Document ID: chunk:federal_register_of_legislation:F2024L00089:front:0:p8
Version: federal_register_of_legislation:F2024L00089
Segment Type: other
Provision Reference: 
Character Range: 22677–25427

the specification range. AVAS may be operational independent of the operation of an internal combustion engine inside or outside of the specified operation range.
If the vehicle that is not equipped with an AVAS fulfils the overall levels as specified in Table 2 below with a margin of +3 dB(A), the specification for one-third octave bands and the frequency shift do not apply.
6.2.1. Constant speed tests
6.2.1.1. The test speeds for approval are 10 km/h and 20 km/h.
6.2.1.2. When tested under the conditions of Annex 3 paragraph 3.3.2., the vehicle shall emit a sound:
(a) That has a minimum overall sound pressure level for the applicable test speed according to Table 2 of paragraph 6.2.8.;
(b) That has at least two of the one-third octave bands according to Table 2 of paragraph 6.2.8. At least one of these bands shall be below or within the 1,600 Hz one-third octave band;
(c) With minimum sound pressure levels in the chosen bands for the applicable test speed according to Table 2 of paragraph 6.2.8., column 3 or column 4.
6.2.1.3. If after a vehicle is tested in accordance with Annex 3 paragraph 3.3.2., for ten consecutive times within a series of measurements without recording a valid measurement because the vehicle's internal combustion engine (ICE) remains active or restarts and interferes with the measurements, the vehicle is exempted from this particular test.
6.2.2. Reversing test
6.2.2.1. When tested under the conditions of Annex 3 paragraph 3.3.3. the vehicle shall emit a sound that has a minimum overall sound pressure level according to Table 2 of paragraph 6.2.8., column 5.
6.2.2.2. If after a vehicle is tested in accordance with Annex 3, paragraph 3.3.3., for ten consecutive times within a series of measurements without recording a valid measurement because the vehicle's ICE remains active or restarts and interferes with the measurements, the vehicle is exempted from this particular test.
6.2.3. Frequency shift to signify acceleration and deceleration
6.2.3.1. The intention of frequency shift is to acoustically inform road users about the change in vehicle speed.
6.2.3.2. When tested under the conditions of Annex 3 paragraph 4, at least one tone within the frequency range as specified in paragraph 6.2.8. emitted by the vehicle shall vary proportionally with speed within each individual gear ratio by an average of at least 0.8 % per 1 km/h in the speed range from 5 km/h to 20 km/h inclusive when driving in forward direction. In case more than one frequency is shifted, only one frequency shift needs to fulfil the requirements.
6.2.4. Stationary sound
 The vehicle may emit a sound when stationary.
6.2.5. Driver selectable sounds
The vehicle manufacturer may define alternative sounds which can be