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The development of a CPX measurement set-up capable of measuring tire-road noise effectively

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NAGDAGA2009/564

The development of a CPX measurement set-up capable of measuring

tire-road noise effectively

Bekke, D.a. Vredestein Banden B.V. bekked@vredestein.com

In the Directive 2001/43 limits are put on the maximum noise level of a pass-by noise measurement on an ISO 10844 surface. This prescribed measurement set-up only gives an LAmaxlevel of the total passage of a whole vehicle equipped

with four tires and does not provide enough information for a problem analysis or model validation. Measuring on one tire with (closed or open) CPX-trailers or -cars gives a better insight into tire-road noise. The difficulties with these measurement set-ups can be the noise generation of the set-up itself, the acoustics of the trailer-interior or vibrations di-rectly disturbing the microphone signals. A CPX measurement set-up has been developed keeping these considerations in mind in order to be able to do proper problem analysis and model validation.

Number of words in abstract: 126 Keywords:

Technical area: Vehicle acoustics Special session: Tire-road noise

Presentation: Poster presentation (Invited paper) Special equipement: No special equipment

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