利用声全息方法研究汽车噪声空间传播

Research on Vehicle's Noise Propogation by Acoustic Holography Method

介绍了一种可用于噪声分析研究的声全息技术。从场论及基尔霍夫衍射出发推导了声全息的基本重建公式 ,利用实验对公式进行了验证 ,并利用声全息分析方法对一辆汽车进行了噪声分析。结果显示声全息方法不仅能够有效地识别汽车表面的噪声源 ,而且还能够进一步反映噪声的空间传播过程 。

This paper presents a new method named Acoustic Holography which can be used to identify noise sources. A new formula of holography reconstruction is obtained, based on the Kirchhoff integral formula. Some tests are carried out using the new formula. Using Acoustic Holography, some interesting results are shown about the noise of a vehicle. The results proved that the Acoustical Holography is an effective method for vehicle's noise, and it can be used to study the vehicle's noise propogation.