council direct eec novemb amend direct eec approxim law member state relat permiss sound level exhaust system motor vehicl council european commun regard treati establish european econom commun articl thereof regard propos commiss cooper european parliament regard opinion econom social committe measur adopt aim progress establish intern market period expir decemb intern market compris area intern frontier free movement good person servic capit ensur european parliament call commiss submit propos lai maximum permiss nois limit take account nois disturb threshold defin organ econom cooper develop oecd council direct eec lai limit valu sound level motor vehicl limit valu reduc time direct eec time direct eec reduct sever case motor buse motor coach lorri amount approxim decibel db council direct eec separ direct eec type approv procedur establish council direct eec februari approxim law member state relat type approv motor vehicl trailer council adopt direct eec amend direct eec decid provis direct review propos commiss propos commiss base studi research legisl measur take account simultan main aspect commun rule motor vehicl sector relat safeti environment protect energi conserv protect public nois pollut requir addit suitabl measur reduc sound level motor vehicl measur account technolog advanc appli time allow implement adopt direct technolog advanc present prototyp stage appli seri product limit valu applic heavi good vehicl effect octob achiev signific effect reduct nuisanc requir differ measur techniqu current actual traffic condit reduc maximum extent type technolog verifi compar hitherto type approv procedur motor vehicl current measur condit definit surfac test track ambient condit test temperatur atmospher pressur humid wind speed background nois requir detail descript closer detail provid mean procedur refer articl direct eec nois pollut eman vehicl caus tyre prove sever vehicl speed exce km protect public effect nois pollut caus traffic urban area requir stage complet stage cover direct consist give addit weight current requir categori vehicl respect sound level mechan part exhaust system motor vehicl stage light detail studi research problem technic solut nois creat contact tyre road surfac result establish realist reproduc criteria method determin import type nois pollut lai requir compli complet stage requir annex direct eec amend reduc sound level valu express db categori vehicl refer annex improv test method high power vehicl type vehicl increasingli design produc higher ratio engin power vehicl mass curv repres torqu function engin speed modifi produc greater motiv forc low engin speed design give rise greater gear ratio urban traffic major influenc nois emit mechan part compar road nois account design modifi measur techniqu type vehicl due allow made speed approach acceler section sound level measur type tyre road surfac exist correspond geograph atmospher condit continu studi research establish criteria met tyre defin numer type approv motor vehicl result studi research permit introduct stage requir addit measur cover nois mechan sourc control sound emiss produc interact tyre roadwai base tyre composit asphalt nois absorb asphalt continu studi research ascertain numer indic order establish object criteria road conform member state allow advanc author introduct vehicl satisfi commun standard mean tax incent impli council octob adopt requir stage commiss present propos march enabl european environ obtain maximum benefit provis time ensur uniti market lai stricter european standard base total harmon adopt direct articl annex direct eec replac annex direct articl effect juli member state ground relat permiss sound level exhaust system refus respect type motor vehicl grant eec type approv issu document refer indent articl direct eec grant nation type approv prohibit initi entri servic vehicl sound level exhaust system type vehicl vehicl compli requir direct eec amend direct effect octob member state longer grant eec type approv issu document refer indent articl direct eec respect type motor vehicl refus grant nation type approv respect type motor vehicl sound level exhaust system compli requir set annex direct eec amend direct effect octob member state prohibit initi entri servic motor vehicl sound level exhaust system compli requir set annex direct eec amend direct articl member state make provis tax incent respect motor vehicl compli direct incent compli provis treati addit meet condit appli nation manufactur motor vehicl import vehicl offer sale market member state meet advanc requir direct due compli termin effect mandatori applic sound level valu laid articl motor vehicl respect type motor vehicl repres amount substanti addit cost technic solut introduc ensur complianc establish valu instal vehicl commiss inform good time plan institut chang tax incent refer subparagraph commiss give consent incent put effect account impact incent intern market articl specif detail condit measur suppli procedur refer articl direct eec subsequ measur intend reconcil safeti requir limit nois aris contact tyre road surfac decid octob council act qualifi major basi propos commiss account studi research perform sourc nois present march member state measur type approv sound level valu publish make wide access octob inform commiss date step compli requir articl member state bring forc law regul administr provis compli direct juli forthwith inform commiss thereof member state adopt provis refer direct accompani refer occas offici public method make refer laid member state member state commun commiss text main provis nation law adopt field govern direct articl direct address member state brussel novemb council presid needham oj oj decis octob publish offici journal oj oj amend direct eec oj oj oj oj amend direct eec oj annex eec type approv respect sound level type motor vehicl definit purpos direct type vehicl mean vehicl differ essenti part shape materi bodywork engin compart soundproof length width vehicl type engin posit compress ignit stroke reciproc rotari piston number capac cylind number type carburettor inject system arrang valv rate maximum power engin speed transmiss system gear ratio test perform relev ratio number type arrang exhaust system number type arrang intak system notwithstand provis item vehicl categori type engin gear ratio regard vehicl type differ provid test method differ consid chang type exhaust intak system exhaust system mean complet set part reduc nois produc vehicl engin exhaust intak system mean complet set part reduc nois produc vehicl engin intak purpos direct system includ manifold type exhaust intak system mean system character fundament differ system compon bea trade mark trade name system characterist materi compon differ compon shape size chang plate procedur galvan aluminium coat deem produc differ type system oper principl compon differ system compon combin differ compon exhaust intak system mean separ compon form exhaust system exhaust pipe silenc proper intak system air filter gear ratio mean number turn made engin turn drive wheel applic eec type approv applic eec type approv respect sound level type motor vehicl submit manufactur vehicl author repres accompani underment document triplic inform descript type vehicl refer point mention item number symbol identifi engin type vehicl type list identif compon part exhaust intak system draw entir exhaust system indic posit vehicl detail draw compon easili locat identifi indic materi vehicl repres type respect type approv sought submit technic servic respons test vehicl manufactur author repres case item singl vehicl repres type question select technic servic conduct approv test accord vehicl manufactur lowest mass run order shortest length specif laid item request technic servic specimen exhaust system engin cylind capac rate maximum power fit vehicl respect type approv sought submit grant type approv compet author verifi exist satisfactori arrang ensur effect control conform product mark exhaust intak system compon exclud fix hardwar pipe bear trade mark manufactur system compon manufactur trade descript mark legibl indel system fit vehicl eec type approv applic mean approv compet author draw certif type appear annex iii attach eec type approv certif vehicl specif gener specif vehicl engin exhaust intak system design construct mount normal condit notwithstand vibrat subject vehicl satisfi requir direct system design construct mount reason resist corros phenomena expos obtain regard condit vehicl specif relat sound level method measur sound emit type vehicl submit eec type approv measur accord method item case move vehicl item case stationari vehicl vehicl maximum permiss mass exceed kg subject addit measur compress air nois vehicl stationari accord item brake equip part vehicl valu measur item record test report certif model shown annex iii detail ambient condit test track type surfac air temperatur wind direct speed ambient nois record test report sound level move vehicl limit valu sound level measur accord item inclus annex exce limit vehicl categori valu express db decibel vehicl intend carriag passeng compris seat includ driver seat vehicl intend carriag passeng equip seat includ driver seat maximum permiss mass tonn engin power kw engin power kw vehicl intend carriag passeng equip seat includ driver seat vehicl intend carriag good maximum permiss mass exceed tonn maximum permiss mass exceed tonn exceed tonn vehicl intend carriag good maximum permiss mass exceed tonn engin power kw engin power kw kw engin power kw vehicl categori limit valu increas db equip direct inject diesel engin vehicl maximum permiss mass tonn design road limit valu increas db engin power kw db engin power kw vehicl categori equip manual oper gear box forward gear engin develop maximum power exceed kw permiss maximum power maximum mass ratio exce kw limit valu increas db speed rear vehicl pass line bb amp prime figur gear greater km measur instrument acoust measur apparatu measur nois level precis sound level meter type public precis sound level meter edit intern electrotechn commiss iec measur carri fast respons sound level meter weight curv public begin end set measur sound level meter calibr manufactur instruct mean sound sourc pistonphon test consid invalid sound level meter error regist calibr exce db speed measur engin speed vehicl speed test section determin accuraci condit measur test site test site consist central acceler section surround substanti flat test area test acceler section level track surfac dry roll nois remain low test track condit free sound field sound sourc microphon attain db condit deem met larg sound reflect object fenc rock bridg build centr acceler section test track surfac compli specif annex vi obstacl affect sound field vicin microphon person stand microphon sound sourc observ carri measur posit affect read measur instrument meteorolog condit measur made poor atmospher condit ensur result affect gust wind ambient nois measur weight sound level sound sourc vehicl test wind effect db sound level produc vehicl suitabl windscreen fit microphon provid account effect sensit direct characterist microphon condit vehicl measur vehicl run order defin item annex direct eec case vehicl uncoupl trailer semi trailer vehicl tyre type fit vehicl manufactur inflat pressur unladen vehicl measur made engin brought normal oper condit temperatur set fuel spark plug carburettor vehicl fit fan automat actuat mechan system interf measur normal highwai drive engag vehicl drive wheel method measur natur number measur maximum sound level express weight decibel db measur vehicl driven line aa amp prime bb amp prime figur measur invalid abnorm discrep peak gener sound level record measur side vehicl posit microphon microphon locat distanc refer line cc amp prime figur track ground axi maximum sensit horizont perpendicular path vehicl line cc amp prime condit oper gener condit measur vehicl driven straight line acceler section median longitudin plane vehicl close line cc amp prime vehicl approach line aa amp prime steadi initi road speed item front end vehicl reach line aa amp prime acceler control fulli oper rapidli practic held fulli open posit rear vehicl reach line bb amp prime acceler control releas quickli trailer articul vehicl uncoupl account cross line bb amp prime approach speed vehicl approach line aa amp prime steadi speed lower speed km speed engin speed equal quarter speed engin develop rate maximum power case vehicl categori case vehicl categori engin power greater kw speed engin speed equal half speed engin develop rate maximum power case vehicl belong categori engin power greater kw case vehicl equip automat transmiss discret ratio chang gear test manufactur select test procedur speed vehicl increas maximum km order avoid chang speed remain km fuel suppli engin limit suppli full load condit consid satisfi case spark ignit engin angl throttl open case compress ignit engin movement central rack inject pump limit travel vehicl equip automat transmiss manual overrid test approach speed km quarter maximum road speed lower test result obtain speed produc maximum sound level choic gear ratio vehicl fit gearbox manual oper automat gearbox vehicl categori equip manual oper gearbox forward gear ratio test gear vehicl categori equip manual oper gearbox forward gear ratio test gear success gear ratio intend normal road consid arithmet sound level record condit calcul test gear engin speed exce engin speed engin develop rate maximum power test repeat approach speed approach engin speed reduc step engin speed attain longer exce vehicl categori forward gear equip engin develop maximum power greater kw permiss maximum power maximum mass ratio exce kw test gear provid speed rear vehicl pass line bb gear greater km vehicl categori total number forward gear ratio includ ratio obtain mean auxiliari gearbox multipl ratio drive axl test turn ratio equal higher test result obtain ratio produc maximum sound level shift gear termin gear engin speed engin develop rate maximum power time reach pass line bb amp prime case vehicl gear ratio includ number gear repres type test vehicl determin highest sound level obtain ratio vehicl select deem repres type highest sound level obtain ratio vehicl select deem repres type vehicl lower gear ratio highest sound level obtain ratio vehicl select deem repres type vehicl higher gear ratio automat transmiss equip manual overrid test conduct selector posit recommend manufactur normal drive extern downshift kickdown put oper interpret result account inaccuraci measur instrument result obtain measur determin deduct db meter read measur consid valid differ consecut measur side vehicl exce db highest sound level measur constitut test result result exce maximum permiss sound level categori vehicl test db measur made microphon posit measur obtain microphon posit fall prescrib limit sound level stationari vehicl sound level vicin vehicl order facilit subsequ check vehicl sound level measur close exhaust system outlet accord requir measur result enter test report drawn purpos issu certif refer annex iii measur instrument acoust measur precis sound level meter defin item measur measur engin speed engin speed determin mean tachomet accuraci tachomet fit vehicl condit measur test site figur area subject signific acoust disturb test site flat surfac cover concret asphalt hard surfac possess high degre reflect suitabl surfac consist earth tamp test site form rectangl side side vehicl rectangl signific obstacl individu observ driver vehicl posit abovement rectangl microphon kerbston meteorolog condit measur made poor atmospher condit ensur result affect gust wind ambient nois read measur instrument produc ambient nois wind db sound level measur suitabl windscreen fit microphon provid account effect sensit microphon condit vehicl vehicl engin brought normal run temperatur measur commenc vehicl fit fan automat actuat mechan system interf sound level measur measur gear lever neutral posit method measur natur number measur maximum sound level express weight decibel db measur oper period refer item measur measur point posit microphon figur microphon locat level exhaust outlet test track surfac whichev higher microphon diaphragm face exhaust outlet distanc axi maximum sensit microphon parallel track surfac angl vertic plane defin direct exhaust gase emit microphon posit side vertic plane greatest distanc microphon vehicl contour exhaust system outlet centr connect silenc microphon face outlet closest vehicl contour outlet highest track surfac case separ measur highest figur record test case vehicl fit vertic exhaust outlet commerci vehicl microphon posit level exhaust outlet face upward axi vertic posit distanc side vehicl closest exhaust outlet design vehicl microphon locat shown figur presenc obstacl form part vehicl spare wheel fuel tank batteri compart draw indic posit microphon made measur conduct microphon nearest obstacl axi maximum sensit face exhaust outlet posit conceal abovement obstacl condit engin oper engin speed stabil quarter speed engin develop rate maximum power constant engin speed reach throttl rapidli return idl posit sound level measur oper period compris mainten constant engin speed entir deceler period maximum sound level meter read test result result test report test report drawn purpos issu certif refer annex iii relev data measur sound stationari vehicl read round nearest decibel measur instrument valu obtain consecut measur differ db consider highest valu constitut test result exhaust system fibrou materi fibrou materi construct silenc suitabl measur undertaken design product stage ensur effici requir compli limit impos item achiev road silenc consid effici road exhaust gase contact fibrou materi silenc prototyp vehicl test accord requir item put normal state road sound level measur achiev test item remov fibrou materi silenc continu road oper km half oper consist town drive half long distanc run high speed continu road oper replac test track programm speed regim altern occas complet test programm includ minimum break hour durat order reproduc effect cool condens occur condit test bench standard part observ vehicl manufactur instruct silenc fit engin coupl dynamomet test conduct hour period break hour period order reproduc effect cool condens occur hour period engin run condit turn minut idl speed hour sequenc load rate maximum speed hour sequenc load rate maximum speed minut sequenc full load rate maximum speed minut sequenc load rate maximum speed minut sequenc load rate maximum speed total durat sequenc hour period compris set abovement sequenc test silenc cool forc draught simul normal airflow vehicl request manufactur silenc cool order exce temperatur record inlet vehicl run maximum speed condit pulsat exhaust system compon thereof fit vehicl refer engin refer case vehicl mount roller dynamomet case engin mount dynamomet test apparatu detail diagram shown figur fit outlet exhaust system apparatu provid equival result accept test apparatu adjust exhaust ga flow altern interrupt establish quick action valv cycl valv open exhaust ga back pressur measur mm downstream intak flang reach bar close pressur differ stabil valv open time delai switch set durat ga exhaust result provis laid item engin speed speed engin develop maximum power power dynamomet full throttl power measur engin speed drainhol close test entir test complet hour cool period observ hour provis articl direct eec eec type approv appli test method set item emploi compress air nois method measur measur perform microphon posit figur vehicl stationari highest weight nois level regist vent pressur regul ventil servic park brake nois vent pressur regul measur engin idl speed ventil nois regist oper servic park brake measur air compressor unit brought highest permiss oper pressur engin switch evalu result microphon posit measur order compens inaccuraci measur equip meter read reduc db reduc result measur result valid differ measur microphon posit exce db highest measur test result exce nois limit db addit measur microphon posit case result measur obtain microphon posit compli nois limit limit sound level exce limit db extens eec type approv vehicl type modifi run unlead petrol approv vehicl type modifi adjust sole purpos make capabl run unlead petrol direct eec extend manufactur certifi subject approv author grant type approv sound level modifi vehicl exce limit valu item vehicl type modifi purpos approv vehicl type extend vehicl type differ regard characterist list annex iii author grant type approv consid modif made substanti advers effect sound level vehicl conform product vehicl manufactur requir direct conform vehicl type approv satisfi requir section order verifi requir item met adequ monitor product carri holder approv ensur exist procedur effect control qualiti product access control equip check conform approv type ensur test result data record annex document remain period determin accord administr servic analyz result type test order verifi ensur stabil product characterist make allow variat industri product ensur type product test prescrib annex carri ensur sampl test piec give evid conform type test consid give rise sampl test step establish conform product compet author grant type approv time verifi conform control method applic product unit inspect test book product survei record present visit inspector inspector sampl random test manufactur laboratori minimum number sampl determin result manufactur verif qualiti level appear unsatisfactori verifi valid test carri applic item inspector select sampl technic servic conduct type approv test compet author carri test prescrib annex normal frequenc inspect compet author year unsatisfactori result record visit compet author ensur step establish conform product rapidli figur microphon posit measur move vehicl figur test site microphon posit measur stationari vehicl distanc metr figur test apparatu condit pulsat inlet flang sleev connect rear test exhaust system hand oper regul valv compens reservoir capac litr pressur switch oper rang bar time delai switch impuls counter quick respons valv exhaust brake valv mm diamet oper pneumat cylind output bar respons time open close exce second exhaust ga evacu flexibl pipe pressur gaug figur microphon posit measur compress air nois measur perform stationari vehicl figur microphon posit distanc contour vehicl ground accord definit item annex direct eec oj stationari vehicl test conduct order establish refer author emploi method inspect vehicl servic vehicl engin power greater kw vehicl engin power greater kw correspond number nearest higher ratio annex ii eec type approv exhaust system separ technic unit replac exhaust system scope annex appli type approv separ technic unit mean articl direct eec exhaust system compon thereof fit type motor vehicl categori replac part definit replac exhaust system compon thereof mean part exhaust system defin section annex intend replac vehicl part type grant eec type approv vehicl accord annex applic eec type approv applic ecc type approv respect replac exhaust system compon thereof separ technic unit submit vehicl manufactur manufactur separ technic unit question author repres applic eec type approv respect type replac exhaust system compon thereof accompani underment document triplic inform descript type vehicl system compon thereof fit refer characterist mention item annex number symbol design engin vehicl type descript replac exhaust system indic rel posit system compon mount instruct detail draw compon easili locat identifi refer materi draw place provid compulsori affix eec type approv request technic servic concern applic submit exampl system respect applic eec type approv made exhaust system type origin fit vehicl eec type approv grant vehicl repres type system fit nois level move concern condit respect limit section annex exce db valu obtain type approv nois level stationari concern respect obtain type approv separ engin type vehicl grant type approv compet author verifi exist satisfactori arrang ensur effect control conform product mark replac exhaust system compon exclud fix hardwar pipe bear trademark trade manufactur replac system compon manufactur trade descript eec type approv number mark legibl indel system fit vehicl eec type approv applic mean approv compet author draw certif model shown annex iv type approv number preced distinct letter countri grant eec type approv specif gener specif replac exhaust system compon thereof design construct capabl mount ensur vehicl compli provis direct normal condit notwithstand vibrat subject exhaust system compon thereof design construct capabl mount reason resist corros phenomena expos obtain regard condit vehicl specif relat sound level acoust effici replac exhaust system compon thereof check method section annex replac exhaust system compon thereof mount vehicl refer section annex sound level obtain method stationari move vehicl satisfi condit exce valu obtain type vehicl grant eec type approv exce sound level valu measur vehicl refer fit exhaust system type fit vehicl eec type approv grant measur vehicl perform replac exhaust system compon thereof ensur vehicl perform compar achiev origin equip exhaust system compon thereof replac exhaust system depend manufactur choic compon system compar origin equip exhaust system compon thereof condit fit turn vehicl refer check form measur pressur loss condit measur replac exhaust system exce measur origin equip system condit mention test method engin test method measur conduct engin refer coupl dynamomet throttl complet open bench adjust obtain engin speed rate maximum power engin measur back pressur pressur tap distanc exhaust manifold figur vehicl test method measur carri vehicl refer item test conduct road roller dynamomet throttl complet open engin load obtain engin speed rate maximum power measur back pressur pressur tap distanc exhaust manifold figur addit provis respect exhaust system compon thereof fill fibrou materi fibrou materi manufactur replac exhaust system compon thereof measur design product stage ensur level effici attain limit set section annex silenc system deem effect traffic exhaust gase contact fibrou materi remov fibrou materi sound level compli requir set exhaust system test vehicl accord method section annex condit observ entir exhaust system subject condit method section annex condit sound level check procedur item emploi applic eec type approv condit origin equip exhaust system submit empti conform product replac exhaust system compon thereof bear eec type approv number pursuant direct conform approv type exhaust system compli requir section order verifi requir item met adequ monitor product carri holder approv ensur exist procedur effect control qualiti product access test equip check conform approv type ensur test result data record annex document remain period determin agreement administr servic analyz result type test order verifi ensur stabil product characterist make allow variat industri product ensur type product test prescrib annex ii carri ensur sampl test piec give evid conform type test question give rise sampl test step restor conform product compet author grant type approv time verifi conform control method applic product unit inspect test book product survei record present visit inspector inspector sampl random test manufactur laboratori minimum number sampl de determin result manufactur verif qualiti level appear unsatisfactori verifi valid test carri applic inspector select sampl technic servic conduct type approv test compet author carri test prescrib annex normal frequenc inspect compet author year unsatisfactori result record visit compet author ensur step restor conform product rapidli back pressur measur point figur figur figur prescrib version direct applic vehicl type approv prescrib version direct applic vehicl type approv figur annex iii model maximum size mm administr annex eec vehicl type approv certif relat sound level articl council direct eec februari approxim law member state relat type approv motor vehicl trailer light amend made pursuant direct eec eec type approv trademark trade vehicl vehicl type list vehicl cover section annex manufactur address applic address manufactur author repres engin manufactur type model rate maximum power kw rev min transmiss automat gearbox automat gearbox number gear equip exhaust silenc manufactur author repres model type accord draw intak silenc manufactur author repres model type accord draw tyre size measur sound level move vehicl measur result left hand side db hand side db posit gear lever measur measur measur fourth measur test result db sound level stationari vehicl db engin speed measur measur measur test result db sound level compress air nois measur result left hand side db hand side db measur measur measur fourth measur test result db date vehicl submit type approv technic servic respons type approv test date test report issu servic number test report issu servic type approv respect sound level grant refus place date signatur document bear abovement type approv number attach annex complet remark establish accord direct eec delet inapplic measur valu db deduct accord provis item annex measur question conduct accord direct measur valu db deduct accord provis section annex delet inapplic annex iv model maximum size mm administr eec type approv certif respect separ technic unit articl council direct eec februari approxim law member state relat type approv motor vehicl trailer separ technic unit replac exhaust system eec type approv number separ technic unit trademark trade type manufactur address applic address manufactur author repres composit separ technic unit trademark trade type motor vehicl silenc fit type vehicl type approv number engin type posit ignit diesel cycl stroke stroke total cylind capac rate maximum engin power kw rev min number gear ratio gear ratio emploi drive axl ratio sound level valu move vehicl db speed stabil acceler km stationari vehicl db rev min variat back pressur restrict respect mount requir date model submit issu eec type approv certif respect separ technic unit technic servic date test report issu technic servic number test report issu technic servic eec type approv separ technic unit grant refus place date signatur document bear abovement type approv number separ technic unit question attach annex complet remark type item inclus complet respect type establish accord direct eec delet inapplic annex eec type approv respect sound level type motor vehicl definit purpos direct type vehicl mean vehicl differ essenti part shape materi bodywork engin compart soundproof length width vehicl type engin posit compress ignit stroke reciproc rotari piston number capac cylind number type carburettor inject system arrang valv rate maximum power engin speed transmiss system gear ratio test perform relev ratio number type arrang exhaust system number type arrang intak system notwithstand provis item vehicl categori type engin gear ratio regard vehicl type differ provid test method differ consid chang type exhaust intak system exhaust system mean complet set part reduc nois produc vehicl engin exhaust intak system mean complet set part reduc nois produc vehicl engin intak purpos direct system includ manifold type exhaust intak system mean system character fundament differ system compon bea trade mark trade name system characterist materi compon differ compon shape size chang plate procedur galvan aluminium coat deem produc differ type system oper principl compon differ system compon combin differ compon exhaust intak system mean separ compon form exhaust system exhaust pipe silenc proper intak system air filter gear ratio mean number turn made engin turn drive wheel applic eec type approv applic eec type approv respect sound level type motor vehicl submit manufactur vehicl author repres accompani underment document triplic inform descript type vehicl refer point mention item number symbol identifi engin type vehicl type list identif compon part exhaust intak system draw entir exhaust system indic posit vehicl detail draw compon easili locat identifi indic materi vehicl repres type respect type approv sought submit technic servic respons test vehicl manufactur author repres case item singl vehicl repres type question select technic servic conduct approv test accord vehicl manufactur lowest mass run order shortest length specif laid item request technic servic specimen exhaust system engin cylind capac rate maximum power fit vehicl respect type approv sought submit grant type approv compet author verifi exist satisfactori arrang ensur effect control conform product mark exhaust intak system compon exclud fix hardwar pipe bear trade mark manufactur system compon manufactur trade descript mark legibl indel system fit vehicl eec type approv applic mean approv compet author draw certif type appear annex iii attach eec type approv certif vehicl specif gener specif vehicl engin exhaust intak system design construct mount normal condit notwithstand vibrat subject vehicl satisfi requir direct system design construct mount reason resist corros phenomena expos obtain regard condit vehicl specif relat sound level method measur sound emit type vehicl submit eec type approv measur accord method item case move vehicl item case stationari vehicl vehicl maximum permiss mass exceed kg subject addit measur compress air nois vehicl stationari accord item brake equip part vehicl valu measur item record test report certif model shown annex iii detail ambient condit test track type surfac air temperatur wind direct speed ambient nois record test report sound level move vehicl limit valu sound level measur accord item inclus annex exce limit vehicl categori valu express db decibel vehicl intend carriag passeng compris seat includ driver seat vehicl intend carriag passeng equip seat includ driver seat maximum permiss mass tonn engin power kw engin power kw vehicl intend carriag passeng equip seat includ driver seat vehicl intend carriag good maximum permiss mass exceed tonn maximum permiss mass exceed tonn exceed tonn vehicl intend carriag good maximum permiss mass exceed tonn engin power kw engin power kw lessthan kw engin power kw vehicl categori limit valu increas db equip direct inject diesel engin vehicl maximum permiss mass tonn design road limit valu increas db engin power kw db engin power kw vehicl categori equip manual oper gear box forward gear engin develop maximum power exceed kw permiss maximum power maximum mass ratio exce kw limit valu increas db speed rear vehicl pass line bb amp prime figur gear greater km measur instrument acoust measur apparatu measur nois level precis sound level meter type public precis sound level meter edit intern electrotechn commiss iec measur carri fast respons sound level meter weight curv public begin end set measur sound level meter calibr manufactur instruct mean sound sourc pistonphon test consid invalid sound level meter error regist calibr exce db speed measur engin speed vehicl speed test section determin accuraci condit measur test site test site consist central acceler section surround substanti flat test area test acceler section level track surfac dry roll nois remain low test track condit free sound field sound sourc microphon attain db condit deem met larg sound reflect object fenc rock bridg build centr acceler section test track surfac compli specif annex vi obstacl affect sound field vicin microphon person stand microphon sound sourc observ carri measur posit affect read measur instrument meteorolog condit measur made poor atmospher condit ensur result affect gust wind ambient nois measur weight sound level sound sourc vehicl test wind effect db sound level produc vehicl suitabl windscreen fit microphon provid account effect sensit direct characterist microphon condit vehicl measur vehicl run order defin item annex direct eec case vehicl uncoupl trailer semi trailer vehicl tyre type fit vehicl manufactur inflat pressur unladen vehicl measur made engin brought normal oper condit temperatur set fuel spark plug carburettor vehicl fit fan automat actuat mechan system interf measur normal highwai drive engag vehicl drive wheel method measur natur number measur maximum sound level express weight decibel db measur vehicl driven line aa amp prime bb amp prime figur measur invalid abnorm discrep peak gener sound level record measur side vehicl posit microphon microphon locat distanc refer line cc amp prime figur track ground axi maximum sensit horizont perpendicular path vehicl line cc amp prime condit oper gener condit measur vehicl driven straight line acceler section median longitudin plane vehicl close line cc amp prime vehicl approach line aa amp prime steadi initi road speed item front end vehicl reach line aa amp prime acceler control fulli oper rapidli practic held fulli open posit rear vehicl reach line bb amp prime acceler control releas quickli trailer articul vehicl uncoupl account cross line bb amp prime approach speed vehicl approach line aa amp prime steadi speed lower speed km speed engin speed equal quarter speed engin develop rate maximum power case vehicl categori case vehicl categori engin power greater kw speed engin speed equal half speed engin develop rate maximum power case vehicl belong categori engin power greater kw case vehicl equip automat transmiss discret ratio chang gear test manufactur select test procedur speed vehicl increas maximum km order avoid chang speed remain km fuel suppli engin limit suppli full load condit consid satisfi case spark ignit engin angl throttl open case compress ignit engin movement central rack inject pump limit travel vehicl equip automat transmiss manual overrid test approach speed km quarter maximum road speed lower test result obtain speed produc maximum sound level choic gear ratio vehicl fit gearbox manual oper automat gearbox vehicl categori equip manual oper gearbox forward gear ratio test gear vehicl categori equip manual oper gearbox forward gear ratio test gear success gear ratio intend normal road consid arithmet sound level record condit calcul test gear engin speed exce engin speed engin develop rate maximum power test repeat approach speed approach engin speed reduc step engin speed attain longer exce vehicl categori forward gear equip engin develop maximum power greater kw permiss maximum power maximum mass ratio exce kw test gear provid speed rear vehicl pass line bb gear greater km vehicl categori total number forward gear ratio includ ratio obtain mean auxiliari gearbox multipl ratio drive axl test turn ratio equal higher test result obtain ratio produc maximum sound level shift gear termin gear engin speed engin develop rate maximum power time reach pass line bb amp prime case vehicl gear ratio includ number gear repres type test vehicl determin highest sound level obtain ratio vehicl select deem repres type highest sound level obtain ratio vehicl select deem repres type vehicl lower gear ratio highest sound level obtain ratio vehicl select deem repres type vehicl higher gear ratio automat transmiss equip manual overrid test conduct selector posit recommend manufactur normal drive extern downshift kickdown put oper interpret result account inaccuraci measur instrument result obtain measur determin deduct db meter read measur consid valid differ consecut measur side vehicl exce db highest sound level measur constitut test result result exce maximum permiss sound level categori vehicl test db measur made microphon posit measur obtain microphon posit fall prescrib limit sound level stationari vehicl sound level vicin vehicl order facilit subsequ check vehicl sound level measur close exhaust system outlet accord requir measur result enter test report drawn purpos issu certif refer annex iii measur instrument acoust measur precis sound level meter defin item measur measur engin speed engin speed determin mean tachomet accuraci tachomet fit vehicl condit measur test site figur area subject signific acoust disturb test site flat surfac cover concret asphalt hard surfac possess high degre reflect suitabl surfac consist earth tamp test site form rectangl side side vehicl rectangl signific obstacl individu observ driver vehicl posit abovement rectangl microphon kerbston meteorolog condit measur made poor atmospher condit ensur result affect gust wind ambient nois read measur instrument produc ambient nois wind db sound level measur suitabl windscreen fit microphon provid account effect sensit microphon condit vehicl vehicl engin brought normal run temperatur measur commenc vehicl fit fan automat actuat mechan system interf sound level measur measur gear lever neutral posit method measur natur number measur maximum sound level express weight decibel db measur oper period refer item measur measur point posit microphon figur microphon locat level exhaust outlet test track surfac whichev higher microphon diaphragm face exhaust outlet distanc axi maximum sensit microphon parallel track surfac angl vertic plane defin direct exhaust gase emit microphon posit side vertic plane greatest distanc microphon vehicl contour exhaust system outlet centr connect silenc microphon face outlet closest vehicl contour outlet highest track surfac case separ measur highest figur record test case vehicl fit vertic exhaust outlet commerci vehicl microphon posit level exhaust outlet face upward axi vertic posit distanc side vehicl closest exhaust outlet design vehicl microphon locat shown figur presenc obstacl form part vehicl spare wheel fuel tank batteri compart draw indic posit microphon made measur conduct microphon nearest obstacl axi maximum sensit face exhaust outlet posit conceal abovement obstacl condit engin oper engin speed stabil quarter speed engin develop rate maximum power constant engin speed reach throttl rapidli return idl posit sound level measur oper period compris mainten constant engin speed entir deceler period maximum sound level meter read test result result test report test report drawn purpos issu certif refer annex iii relev data measur sound stationari vehicl read round nearest decibel measur instrument valu obtain consecut measur differ db consider highest valu constitut test result exhaust system fibrou materi fibrou materi construct silenc suitabl measur undertaken design product stage ensur effici requir compli limit impos item achiev road silenc consid effici road exhaust gase contact fibrou materi silenc prototyp vehicl test accord requir item put normal state road sound level measur achiev test item remov fibrou materi silenc continu road oper km half oper consist town drive half long distanc run high speed continu road oper replac test track programm speed regim altern occas complet test programm includ minimum break hour durat order reproduc effect cool condens occur condit test bench standard part observ vehicl manufactur instruct silenc fit engin coupl dynamomet test conduct hour period break hour period order reproduc effect cool condens occur hour period engin run condit turn minut idl speed hour sequenc load rate maximum speed hour sequenc load rate maximum speed minut sequenc full load rate maximum speed minut sequenc load rate maximum speed minut sequenc load rate maximum speed total durat sequenc hour period compris set abovement sequenc test silenc cool forc draught simul normal airflow vehicl request manufactur silenc cool order exce temperatur record inlet vehicl run maximum speed condit pulsat exhaust system compon thereof fit vehicl refer engin refer case vehicl mount roller dynamomet case engin mount dynamomet test apparatu detail diagram shown figur fit outlet exhaust system apparatu provid equival result accept test apparatu adjust exhaust ga flow altern interrupt establish quick action valv cycl valv open exhaust ga back pressur measur mm downstream intak flang reach bar close pressur differ stabil valv open time delai switch set durat ga exhaust result provis laid item engin speed speed engin develop maximum power power dynamomet full throttl power measur engin speed drainhol close test entir test complet hour cool period observ hour provis articl direct eec eec type approv appli test method set item emploi compress air nois method measur measur perform microphon posit figur vehicl stationari highest weight nois level regist vent pressur regul ventil servic park brake nois vent pressur regul measur engin idl speed ventil nois regist oper servic park brake measur air compressor unit brought highest permiss oper pressur engin switch evalu result microphon posit measur order compens inaccuraci measur equip meter read reduc db reduc result measur result valid differ measur microphon posit exce db highest measur test result exce nois limit db addit measur microphon posit case result measur obtain microphon posit compli nois limit limit sound level exce limit db extens eec type approv vehicl type modifi run unlead petrol approv vehicl type modifi adjust sole purpos make capabl run unlead petrol direct eec extend manufactur certifi subject approv author grant type approv sound level modifi vehicl exce limit valu item vehicl type modifi purpos approv vehicl type extend vehicl type differ regard characterist list annex iii author grant type approv consid modif made substanti advers effect sound level vehicl conform product vehicl manufactur requir direct conform vehicl type approv satisfi requir section order verifi requir item met adequ monitor product carri holder approv ensur exist procedur effect control qualiti product access control equip check conform approv type ensur test result data record annex document remain period determin accord administr servic analyz result type test order verifi ensur stabil product characterist make allow variat industri product ensur type product test prescrib annex carri ensur sampl test piec give evid conform type test consid give rise sampl test step establish conform product compet author grant type approv time verifi conform control method applic product unit inspect test book product survei record present visit inspector inspector sampl random test manufactur laboratori minimum number sampl determin result manufactur verif qualiti level appear unsatisfactori verifi valid test carri applic item inspector select sampl technic servic conduct type approv test compet author carri test prescrib annex normal frequenc inspect compet author year unsatisfactori result record visit compet author ensur step establish conform product rapidli figur microphon posit measur move vehicl figur test site microphon posit measur stationari vehicl distanc metr figur test apparatu condit pulsat inlet flang sleev connect rear test exhaust system hand oper regul valv compens reservoir capac litr pressur switch oper rang bar time delai switch impuls counter quick respons valv exhaust brake valv mm diamet oper pneumat cylind output bar respons time open close exce second exhaust ga evacu flexibl pipe pressur gaug figur microphon posit measur compress air nois measur perform stationari vehicl figur microphon posit distanc contour vehicl ground accord definit item annex direct eec oj stationari vehicl test conduct order establish refer author emploi method inspect vehicl servic vehicl engin power greater kw vehicl engin power greater kw correspond number nearest higher ratio annex ii eec type approv exhaust system separ technic unit replac exhaust system scope annex appli type approv separ technic unit mean articl direct eec exhaust system compon thereof fit type motor vehicl categori replac part definit replac exhaust system compon thereof mean part exhaust system defin section annex intend replac vehicl part type grant eec type approv vehicl accord annex applic eec type approv applic ecc type approv respect replac exhaust system compon thereof separ technic unit submit vehicl manufactur manufactur separ technic unit question author repres applic eec type approv respect type replac exhaust system compon thereof accompani underment document triplic inform descript type vehicl system compon thereof fit refer characterist mention item annex number symbol design engin vehicl type descript replac exhaust system indic rel posit system compon mount instruct detail draw compon easili locat identifi refer materi draw place provid compulsori affix eec type approv request technic servic concern applic submit exampl system respect applic eec type approv made exhaust system type origin fit vehicl eec type approv grant vehicl repres type system fit nois level move concern condit respect limit section annex exce db valu obtain type approv nois level stationari concern respect obtain type approv separ engin type vehicl grant type approv compet author verifi exist satisfactori arrang ensur effect control conform product mark replac exhaust system compon exclud fix hardwar pipe bear trademark trade manufactur replac system compon manufactur trade descript eec type approv number mark legibl indel system fit vehicl eec type approv applic mean approv compet author draw certif model shown annex iv type approv number preced distinct letter countri grant eec type approv specif gener specif replac exhaust system compon thereof design construct capabl mount ensur vehicl compli provis direct normal condit notwithstand vibrat subject exhaust system compon thereof design construct capabl mount reason resist corros phenomena expos obtain regard condit vehicl specif relat sound level acoust effici replac exhaust system compon thereof check method section annex replac exhaust system compon thereof mount vehicl refer section annex sound level obtain method stationari move vehicl satisfi condit exce valu obtain type vehicl grant eec type approv exce sound level valu measur vehicl refer fit exhaust system type fit vehicl eec type approv grant measur vehicl perform replac exhaust system compon thereof ensur vehicl perform compar achiev origin equip exhaust system compon thereof replac exhaust system depend manufactur choic compon system compar origin equip exhaust system compon thereof condit fit turn vehicl refer check form measur pressur loss condit measur replac exhaust system exce measur origin equip system condit mention test method engin test method measur conduct engin refer coupl dynamomet throttl complet open bench adjust obtain engin speed rate maximum power engin measur back pressur pressur tap distanc exhaust manifold figur vehicl test method measur carri vehicl refer item test conduct road roller dynamomet throttl complet open engin load obtain engin speed rate maximum power measur back pressur pressur tap distanc exhaust manifold figur addit provis respect exhaust system compon thereof fill fibrou materi fibrou materi manufactur replac exhaust system compon thereof measur design product stage ensur level effici attain limit set section annex silenc system deem effect traffic exhaust gase contact fibrou materi remov fibrou materi sound level compli requir set exhaust system test vehicl accord method section annex condit observ entir exhaust system subject condit method section annex condit sound level check procedur item emploi applic eec type approv condit origin equip exhaust system submit empti conform product replac exhaust system compon thereof bear eec type approv number pursuant direct conform approv type exhaust system compli requir section order verifi requir item met adequ monitor product carri holder approv ensur exist procedur effect control qualiti product access test equip check conform approv type ensur test result data record annex document remain period determin agreement administr servic analyz result type test order verifi ensur stabil product characterist make allow variat industri product ensur type product test prescrib annex ii carri ensur sampl test piec give evid conform type test question give rise sampl test step restor conform product compet author grant type approv time verifi conform control method applic product unit inspect test book product survei record present visit inspector inspector sampl random test manufactur laboratori minimum number sampl de determin result manufactur verif qualiti level appear unsatisfactori verifi valid test carri applic inspector select sampl technic servic conduct type approv test compet author carri test prescrib annex normal frequenc inspect compet author year unsatisfactori result record visit compet author ensur step restor conform product rapidli back pressur measur point figur figur figur prescrib version direct applic vehicl type approv prescrib version direct applic vehicl type approv figur annex iii model maximum size mm administr annex eec vehicl type approv certif relat sound level articl council direct eec februari approxim law member state relat type approv motor vehicl trailer light amend made pursuant direct eec eec type approv trademark trade vehicl vehicl type list vehicl cover section annex manufactur address applic address manufactur author repres engin manufactur type model rate maximum power kw rev min transmiss automat gearbox automat gearbox number gear equip exhaust silenc manufactur author repres model type accord draw intak silenc manufactur author repres model type accord draw tyre size measur sound level move vehicl measur result left hand side db hand side db posit gear lever measur measur measur fourth measur test result db sound level stationari vehicl db engin speed measur measur measur test result db sound level compress air nois measur result left hand side db hand side db measur measur measur fourth measur test result db date vehicl submit type approv technic servic respons type approv test date test report issu servic number test report issu servic type approv respect sound level grant refus place date signatur document bear abovement type approv number attach annex complet remark establish accord direct eec delet inapplic measur valu db deduct accord provis item annex measur question conduct accord direct measur valu db deduct accord provis section annex delet inapplic annex iv model maximum size mm administr eec type approv certif respect separ technic unit articl council direct eec februari approxim law member state relat type approv motor vehicl trailer separ technic unit replac exhaust system eec type approv number separ technic unit trademark trade type manufactur address applic address manufactur author repres composit separ technic unit trademark trade type motor vehicl silenc fit type vehicl type approv number engin type posit ignit diesel cycl stroke stroke total cylind capac rate maximum engin power kw rev min number gear ratio gear ratio emploi drive axl ratio sound level valu move vehicl db speed stabil acceler km stationari vehicl db rev min variat back pressur restrict respect mount requir date model submit issu eec type approv certif respect separ technic unit technic servic date test report issu technic servic number test report issu technic servic eec type approv separ technic unit grant refus place date signatur document bear abovement type approv number separ technic unit question attach annex complet remark type item inclus complet respect type establish accord direct eec delet inapplic annex check conform product vehicl gener requir consist test held check conform product pursuant section annex test procedur method test measur instrument interpret result annex vehicl test subject test measur nois vehicl motion section annex sampl vehicl chosen test vehicl consid conform requir direct vehicl test evalu result sound level vehicl test pursuant section exce db limit valu prescrib item annex vehicl type consid conform requir direct vehicl test satisfi requir laid section vehicl type test pursuant section sound level vehicl exce db limit valu prescrib section annex vehicl type consid conform requir direct manufactur measur restor conform ii replac exhaust system gener requir consist test held check conform product pursuant section annex ii test procedur method test measur instrument interpret result annex ii exhaust system compon test subject test annex ii section sampl exhaust system compon chosen test sampl consid conform requir direct sampl test evalu result sound level exhaust system compon test pursuant section measur accord section annex ii exce db level measur eec type approv test type exhaust system compon exhaust system compon type consid conform requir direct exhaust system compon test satisfi requir laid section exhaust system compon type test pursuant section sound level sampl exce db level measur eec type approv test type exhaust system compon exhaust system compon type consid conform requir direct manufactur measur restor conform annex vi test track specif annex lai specif relat physic characterist pave layout test track pave requir characterist surfac surfac consid conform direct provid textur void content sound absorpt coeffici measur found fulfil requir provid design requir section met residu void content residu void content vc test track pave mixtur exce section measur procedur sound absorpt coeffici surfac fail compli residu void content requir surfac accept sound absorpt coeffici amp le section measur procedur requir section met sound absorpt measur found amp le textur depth textur depth td measur volumetr method section td amp ge mm homogen surfac practic effort ensur surfac made homogen test area includ textur void content observ roll process result effect roll place textur unev caus bump occur period test order check surfac continu conform textur void content sound absorpt requir stipul standard period test surfac interv residu void content sound absorpt surfac surfac meet requir period test requir meet requir surfac tend clog compact time textur depth td surfac nois test start nb week lai twelv month test surfac design area design test track layout import ensur minimum requir area travers vehicl run test strip cover test materi suitabl margin safe practic drive requir width track length track extend line aa bb end figur show plan suitabl test site minimum area machin laid machin compact test surfac materi figur minimum requir test surfac area shade part call test area design requir surfac test surfac meet design requir dens asphalt concret maximum chip size mm toler mm thick wear amp ge mm binder straight penetr grade bitumen modif guid test surfac constructor aggreg grade curv give desir characterist shown figur addit tabl guidelin order obtain desir textur durabl grade curv fit formula pass dmax squar mesh siev size mm dmax mm curv dmax mm lower toler curv dmax mm upper toler curv addit recommend sand fraction mm lt squar mesh siev size lt mm includ natur sand crush sand base base ensur good stabil even road construct practic chip crush crush face materi high resist crush chip mix wash extra chip ad surfac binder hard express pen depend climat condit countri rule hard binder provid consist common practic temperatur mix roll chosen achiev subsequ roll requir void content order increas probabl satisfi specif section compact studi choic mix temperatur number pass choic compact vehicl figur grade curv aggreg asphalt mix toler tabl design guidelin target valu total mass mix mass apprec toler mass stone squar mesh siev sm gt mm mass sand lt sm lt mm mass filler sm lt mm mass binder bitumen maximum chip size mm binder hard polish stone psv doc bibliographi gt compact rel marshal compact test method measur residu void content purpos measur core track posit equal distribut test area line aa bb figur order avoid inhomogen uneven wheel track core wheel track close core minimum close wheel track core minimum approxim midwai wheel track microphon locat suspicion condit homogen met section core locat test area residu void content determin core averag core calcul compar requir section addit singl core void higher test surfac constructor remind problem aris test area heat pipe electr wire core area instal carefulli plan respect futur core drill locat recommend leav locat size approxim mm wire pipe locat deep order damag core surfac layer sound absorpt coeffici sound absorpt coeffici normal incid measur imped tube method procedur iso di acoust determin sound absorpt coeffici imped tube method test specimen requir residu void content section sound absorpt measur rang hz rang hz centr frequenc octav band maximum valu identifi frequenc rang valu test core averag constitut final result volumetr macrotextur measur purpos standard textur depth measur made posit evenli space wheel track test strip averag compar minimum textur depth annex draft standard iso di descript procedur stabil time mainten ag influenc common surfac expect tyre road nois level measur test surfac increas slightli month construct surfac achiev requir characterist earlier week construct influenc ag nois truck gener car stabil time determin polish compact vehicl drive surfac period check state section mainten surfac loos debri dust significantli reduc effect textur depth remov surfac countri winter climat salt de ic salt alter surfac temporarili perman increas nois recommend repav test area repav test track unnecessari repav test strip width figur vehicl drive provid test area strip met requir residu void content sound absorpt measur document surfac test perform document test surfac data document describ test surfac locat test track type binder binder hard type aggreg maximum theoret densiti concret dr thick wear grade curv determin core test track method compact type roller roller mass number pass temperatur mix temperatur ambient air wind speed lai surfac date surfac laid contractor latest test result includ residu void content core ii locat test area core void measur iii sound absorpt coeffici core measur result core frequenc rang averag iv locat test area core absorpt measur textur depth includ number test standard deviat vi institut respons test iii type equip vii date test date core test track document vehicl nois test conduct surfac document describ vehicl nois test state requir fulfil refer document section