During the last meeting, Japan had presented basics for a concept of a GTR. This presentation contain concrete proposal. The operating conditions for sound generation method and attenuation are identical with the requirements that are specified in RE3. However, a contracting party shall have the possibility to allow the fitting of a pause switch.

The type of sound shall be the same as R.E.3, except that the article of “The following and similar types of sounds should be avoided” should be deleted, since it is confusing whether (iv) and (v) are prohibited or not.

The pitch shift shall be quantified. It is proposed to have frequency changes of at least 15% at speeds between 5km/h and 20 km/h. The overall volume level should be [xx] dB(A) or more at the vehicle speed of 10km/h and [xx] dB(A) at 20km/h. Each frequency range of [less than 800Hz] and [over 1.25kHz] in 1/3 octave band frequency should exist one or more bands of [xx]dB(A) or more at the vehicle speed of 10km/h and [xx]dB(A) at 20km/h.

France supports the general concept. A maximum overall needs to be defined. For the US it is at the current point in time difficult to decide about a general maximum level so that this may have to be assigned to the individual contracting parties. From the safety aspect a minimum level is required. COM requests to clear set minimum and maximum levels that are well balanced between safety and environmental aspects. The US there is no federal maximum noise level today (pass-by) and it appears difficult to determine such a value for QRTV. On national level, maximum sound emission should be regulated by adequate legislation, such as ECE R51. France replied that ECE 51 does not cover the critical speed range in question.

WP29 may have to request GRB to further develop R51 to an extended speed range.