Regulation No. 41-04 Proposed Supplement 3

Name:Regulation No. 41-04 Proposed Supplement 3
Description:Noise - Motorcycles. Proposed Supplement 3 to the 04 Series.
Official Title:Proposal for Supplement 3 to the 04 Series of Amendments to Regulation No. 41 (Noise Emissions of Motorcycles).
Country:ECE - United Nations
Date of Issue:2015-04-10
Amendment Level:Original
Number of Pages:3
Information:Provisional Date of Entry into Force: January 20, 2016
Vehicle Types:Motorcycle
Subject Categories:Drafts and Proposals (Historical)
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Keywords:

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Text Extract:

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ECE/TRANS/WP.29/2015/61
PROPOSAL FOR SUPPLEMENT 3 TO THE 04 SERIES OF
AMENDMENTS TO
REGULATION NO. 41
(NOISE EMISSIONS OF MOTORCYCLES)
ADOPTED AT THE 166 SESSION – JUNE 2015
PROVISIONAL DATE OF ENTRY INTO FORCE: JANUARY 20, 2016

Paragraph 1.2.1., amend to read:
"1.2.1. Test Site
Annex 4,
The test site shall consist of a central acceleration section surrounded by a substantially
level test area. The acceleration section shall be level; its surface shall be dry and so
designed that rolling noise remains low.
On the test site the variations in the free sound field between the sound source at the centre
of the acceleration section and the microphone shall be maintained to within 1dB(A). This
condition will be deemed to be met if there are no large objects which reflect sound, such as
fences, rocks, bridges or buildings, within 50m of the centre of the acceleration section. The
road surface covering of the test site shall conform to the requirements of Annex 4 or to
ISO10844:2014.
The microphone shall not be obstructed in any way which could affect the sound field, and
no person may stand between the microphone and the sound source. The observer carrying
out the measurements shall take up position so as not to affect the readings of the
measuring instrument."
After the title, insert the reference to a new Footnote 1 and a new Footnote 1, to read:
" The specifications for the test site reproduced in this Annex are valid until the end of the period
indicated in Paragraph 12.9."
Paragraph 1., the reference to Footnote 1 and Footnote 1, renumber as Footnote 2.
Paragraph 2.2., the reference to Footnote 2 and Footnote 2, renumber as Footnote 3.
Annex 7, Paragraph 3.2.2., amend to read:
"3.2.3. Data Processing and Reporting
The requirements of Paragraph 1.4. of Annex 3 shall be applied.
In addition the engine speed values at AA', BB', and PP' in units of min shall be
mathematically rounded to the nearest integer for further calculations. For a given test
condition the three individual engine speeds shall be averaged arithmetically.
The final sound pressure levels for the full throttle acceleration shall not exceed the limits
specified in Paragraph 2.6. above."
Noise - Motorcycles. Proposed Supplement 3 to the 04 Series.