UNITED

NATIONS

Distr.

Economic and Social	GENERAL

Council	TRANS/WP.29/784
4 May 2001

ENGLISH

Original: ENGLISH and

FRENCH

ECONOMIC COMMISSION FOR EUROPE

INLAND TRANSPORT COMMITTEE

World Forum for Harmonization of Vehicle Regulations (WP.29)

CORRIGENDUM 2 TO THE 01 SERIES OF AMENDMENTS

T0 REGULATION No. 63

(Noise of mopeds)

Note: The text reproduced below was adopted by the Administrative Committee (AC.1) of the amended 1958 Agreement at its seventeenth session, following the recommendation by WP.29 at its one-hundred-and-twenty-third session. It is based on document TRANS/WP.29/2001/4, not amended (TRANS/WP.29/776, para. 118).

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GE.01-

Annex 3,

Paragraph 3.2.3.1., amend to read:

"3.2.3.1.	Nature and number of measurements

The maximum sound level expressed in A-weighted decibels (dB(A)) shall be measured during the period of operation laid down in paragraph 3.2.3.3.2.1. below.

At least three measurements shall be taken at each measuring	point."

Paragraph 3.2.3.3.2.2., amend to read:

"3.2.3.3.2.2.	When the constant engine speed is reached, the throttle shall be returned swiftly to the idle position. The sound level shall be measured during a period of operation consisting of a brief maintenance of the constant engine speed and throughout the deceleration period. "

Insert a new paragraph 3.2.3.3.3., to read:

"3.2.3.3.3.	The values rounded off to the nearest whole decibel, shall be read from the measuring apparatus. If the figure following the decimal point is between 0 and 4, the total is rounded down and if between 5 and 9, it is rounded up.

Only values which are obtained from three consecutive measurements which do not differ by more than 2 dB(A) shall be accepted.

The highest of the three measurements will constitute the test result."

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