Noise source identification on rolling tires by sound intensity measurement
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概要
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The sound radiation characteristics of actually rolling tires with three types of the tread patterns were measured by the 2-microphone sound intensity technique. The measerements were performed at a test course in Japan Automobile Research Institute, in which a special trailer equipped with an automatic microphone scanning system was used and the normal sound intensity distribution in a place parallel to the sidewall of a tire was mesured during actul running. The results show that it is possible to identify the source positions on a tire actually rolling on a road surface by means of the sound intensity technique. In the case of a rib tire, the noise was mainly generated from the leading and the trailing edges, not from the contact patch, while in the case of a lug tire, the main source position was the contact patch. The noise radiation pattern varied according to the diffierence of tread pattern. Further, the sound power radiated by three kinds of tires were compared. A-weighted sound power level of the lug tire is the biggest among them.
- 社団法人日本音響学会の論文
著者
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Tachibana Hideki
Institute Of Industrial Science University Of Tokyo
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Oshino Yasuo
Japan Automobile Res. Inst.
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Oshino Yasuo
Japan Automobile Research Institute Inc.
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