1 Scope
This International Standard specifies the essential characteristics of a test surface intended to be used for measuring vehicle and tyre or road noise emissions.
The surface design given in this International Standard
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— produces consistent levels of tyre or road sound emission under a wide range of operating conditions including those appropriate to vehicle sound testing,
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— minimizes inter-site variation,
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— provides minor absorption of the vehicle sound sources, and
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— is consistent with road-building practice.
NOTE For the purposes of this International Standard, the terms noise and sound are used interchangeably.