Document ID: chunk:federal_register_of_legislation:F2021C00509:front:0:p28
Version: federal_register_of_legislation:F2021C00509
Segment Type: other
Provision Reference: 
Character Range: 82670–85570

exceeds the noise limit by 1 dB(A), two additional measurements are to be taken at the corresponding microphone position. In this case, three out of the four results of measurement obtained at this position have to comply with the noise limit.

           3. Limiting value

            The sound level shall not exceed the limit of 72 dB(A).
           Annex 6 – Appendix

Figure 1
Microphone positions for measurement of compressed air noise

The measurement is performed at the stationary vehicle according to Figure 1, using two microphone positions at a distance of 7 m from the contour of the vehicles, and at 1.2 m above ground.
           Annex 7

           CHECKS ON CONFORMITY OF PRODUCTION

           1. General

            These requirements are consistent with the test to be held to check conformity of production according to paragraphs 8.3.5 and 8.4.3 of this Regulation.

           2. Testing procedure

            The test site and measuring instruments shall be those as described in annex 3.

           2.1. The vehicle(s) under test shall be subjected to the test for measurement of noise of vehicle in motion as described in paragraph 3.1. of annex 3.

           2.2. Compressed air noise

            Vehicles having maximum mass exceeding 2,800 kg and equipped with compressed air systems must be subjected to an additional test for measurement of the compressed air noise as described in paragraph 1 of annex 6.

           3. Sampling

            One vehicle has to be chosen. If after the test of paragraph 4.1 the vehicle is not considered to conform to the requirements of this Regulation, two more vehicles have to be tested.

           4. Evaluation of the results

           4.1. If the sound level of the vehicle tested pursuant to paragraphs 1 and 2 does not exceed by more than 1 dB (A) the limit value prescribed in paragraph 6.2.2. of this Regulation, for measurement according to paragraph 2.1. above, and in paragraph 3 of annex 6 to this Regulation, for measurement according to paragraph 2.2. above, the vehicle type shall be considered to conform to the requirements of this Regulation.

           4.2. If the vehicle tested according to paragraph 4.1 does not satisfy the requirements laid down in that paragraph, two more vehicles of the same type have to be tested pursuant to paragraphs 1 and 2.

           4.3. If the sound level of the seocnd and/or third vehicle of paragraph 4.2 exceeds by more than 1 dB(A) the limit values prescribed in paragraph 6.2.2 of this Regulation, the vehicle type shall be considered not to conform to the requirements of this Regulation and the manufacturer shall take the necessary measures to re-establish to conformity.
Annex 8

SPECIFICATIONS FOR THE TEST SITE

1. Introduction

            This annex describes the specifications relating to the physical characteristics and the laying of the test track.