Division 4.1.10 Boundary characteristics linked to interior noise (BP20)
United Kingdom
The interior noise level of passenger vehicles is not considered to be an interoperability constituent. However, the noise level within the driver's cab is an important issue and in this case a permissible equivalent continuous sound pressure level of 84 dB(A) shall not be exceeded over 30 minutes. The measuring methods are defined in Chapter 6 of this TSI. The values recommended for new vehicle designs are indicated in Chapter 7.