An experimental procedure to obtain sound power level of tyre/road noise under Coast-By conditions

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• 作者：Nuria Campillo-Davo ; ^{ncampillo@umh.es} ; Ramon Peral-Orts ; Emilio Velasco-Sanchez ; Hector Campello-Vicente
• 关键词：Tyre ; Noise ; Power ; Coast-By
• 刊名：Applied Acoustics
• 出版年：2013
• 出版时间：May, 2013
• 年：2013
• 卷：74
• 期：5
• 页码：718-727
• 全文大小：2202 K

文摘

The rolling noise from tyre-pavement interaction represents the greatest sound contribution from a vehicle when cruising at a high speed. To evaluate the sound levels from this source, existing standardized methods that establish different measurement procedures in both the immediate tyre surroundings, for example the Close-Proximity method, as well as at greater distances, as the Coast-By method. A fundamental parameter that can quantify the sound generation of a source is its sound power level. The standardized methods establish procedures to measure the sound pressure level but not the power level of a tyre as a noise source. For this reason, this paper presents a novel methodology based on sound pressure measurements to obtain the sound power level that a vehicle emits in Coast-By conditions, where noise is generated at tyre/road interaction. The paper describes the testing procedure used to obtain the sound power level, and it is accompanied by a mathematical simulation that studies the feasibility of the proposal. Finally, the proposed methodology is further validated through a field study.