基于声阵列技术的汽车噪声源识别试验研究

Experimental study on noise sources identification of vehicle based on microphone array technology

声阵列技术通过多个传声器获取声场信息,使用波束形成原理对声场信号进行处理,能对宽带声源进行有效识别。利用基于波束形成的声阵列噪声源分析技术,研究了汽车辐射噪声的频率特性和能量分布特性,通过与光学图像的自动重叠,获得了汽车整车最大噪声源的频率、空间位置及产生来源。试验结果表明,声阵列技术能够快速有效地进行噪声源诊断和声源空间定位,为汽车的噪声控制提供了科学依据。

Using the microphone array system based on beam forming technology, the frequency and energy distribution properties of the noise emission of vehicle were investigated. The frequencies and exact noise poisitions were determined by means of the automatically overlapping of optical pictures. The results show that the microphone array technology is an effective way for noise diagnosis and sound localization, it offers the scientific basis for noise control of vehicle.