Tests with a silencer according to the present invention yielded {HEAD ~ a sound pressure level} in {TAIL ~ free field vehicle noise measurement} according to the abovementioned Directive 70/157 EWG of 69 dB 
Tests with a silencer according to the present invention yielded { HEAD ~ a sound pressure level } in { TAIL ~ free field vehicle noise measurement } according to the abovementioned Directive 70/157 EWG of 69 dB
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH