Cox, Johnson, and Alexander (2012) report cochlear dead regions (DRs) occur when inner hair cells at a given frequency are lost or malfunctioning. Previous publications have suggested hearing-aid high-frequency gain should be attenuated in the presence of high frequency DRs.
Precondition for a VdS approval procedure, among others, is proof of a certified quality management system in accordance with DIN EN ISO 9001 for the manufacturing facility of the product.
1 European Community Whole Vehicle Type Approval (ECWVTA), currently this applies to passenger cars. 2  On the 29th October 2012, ECWVTA was extended to cover all new road vehicles and their trailers.NECE Regulations to which the Community has acceded and which are listed in Part I of Annex IV and in Annex XI of the frame Directive are part of the EC type-approval of a vehicle in the same way as the separate directives or regulations.