Document ID: chunk:federal_register_of_legislation:F2006L01279:body:0:p8
Version: federal_register_of_legislation:F2006L01279
Segment Type: other
Provision Reference: 
Character Range: 22695–25436

to 95 per cent of the supply necessary for full load.[2]
2.3.2.4.2.2  Position of the manual selector
    The test shall be conducted with the selector in the position recommended by the 'Manufacturer' for normal driving.
2.3.2.4.2.3  Auxiliary gears.
    If the vehicle is fitted with an auxiliary manual transmission or multi-gear axle, the position used for normal urban driving shall be used. In all cases, the special selector positions for slow movement, parking, or braking shall be excluded.

2.4   Interpretation of results for vehicles in motion.
    2.4.1   The measurements of the noise emitted by the vehicle in motion shall be considered valid if the difference between the two consecutive measurements on the same side of a vehicle is not more than 2 dB(A).
    2.4.2   To allow for lack of precision in the measuring instrument the figures read from it during measurement shall be reduced by 1 dB(A).
    2.4.3   The figure reported shall be that corresponding to the highest sound level. Should that figure exceed by more than 1dB(A) the maximum sound level authorised for the category of vehicle tested a second series of two measurements shall be made. Three out of the four results so obtained must fall within the prescribed limits.

3. Procedure for Stationary Vehicles
(Refer to diagram - Section 4)
3.1   Requirements for tests on stationary vehicles.
    3.1.1   Tests on stationary vehicles (exhaust noise tests) should ideally be carried out consecutively with the tests on the same vehicle in motion.
    3.1.2   The measurements shall be made at an open site where the ambient and wind noise levels are at least 10 dB(A) below the noise level being measured. The site may take the form of an open space where a rectangle with sides no closer than 3 m from the extremities of the vehicle can be described. The test site surface should be practically level, consisting of concrete, asphalt or similar material and not covered with powdery snow, tall grass, loose soil, ashes or the like.
    3.1.3   Measurements shall not be made under adverse weather conditions. Any sound peak which appears to be unrelated to the characteristics of the general sound level of the vehicle shall be ignored in taking the readings. If a wind guard is used, its influence on the sensitivity and the directional characteristics of the microphone shall be taken into account.
    3.1.4   Whilst testing is in progress no person other than any occupants of the vehicle shall be within 1 m of the microphone in use. No person or object other than the person conducting the test and an observer or the objects necessary for the performance of the test shall be within 3m of the microphone in use.
    3.1.5   Before the measurements are