Padois Thomas, Berry Alain
Groupe d'Acoustique de l'Université de Sherbrooke (GAUS)-Department of Mechanical Engineering, Université de Sherbrooke, 2500 boulevard de l'université, Sherbrooke (Qc) J1K 2R1 Canada
J Acoust Soc Am. 2017 Feb;141(2):EL134. doi: 10.1121/1.4976138.
Snowmobile manufacturers invest important efforts to reduce the noise emission of their products. The noise sources of snowmobiles are multiple and closely spaced, leading to difficult source separation in practice. In this study, source imaging results for snowmobile pass-by noise are discussed. The experiments involve a 193-microphone Underbrink array, with synchronization of acoustic with video data provided by a high-speed camera. Both conventional beamforming and Clean-SC deconvolution are implemented to provide noise source maps of the snowmobile. The results clearly reveal noise emission from the engine, exhaust, and track depending on the frequency range considered.
雪地摩托制造商投入了大量精力来降低其产品的噪音排放。雪地摩托的噪声源多种多样且分布紧密，这导致在实际中难以进行声源分离。在本研究中，讨论了雪地摩托通过时噪声的声源成像结果。实验采用了一个由193个麦克风组成的Underbrink阵列，并将声学数据与高速摄像机提供的视频数据进行同步。同时实施了传统波束形成和Clean-SC反卷积来生成雪地摩托的噪声源地图。结果清楚地揭示了根据所考虑的频率范围，发动机、排气口和履带的噪声排放情况。
