基于传声器阵列技术的定置汽车噪声源识别

Noise Source Identification of Customized Vehicles based on Microphone Array Technology

随着人们对汽车噪声的日益关注和汽车噪声限制标准的日渐严格,控制汽车噪声已经成为汽车工业发展中一项重要而又紧迫的任务。文章基于均匀圆形传声器阵列技术,采用MUSIC空间谱估计算法,对某型轿车定置状态时不同转速下分别进行噪声源识别,找出其主要噪声源和声场分布特性,为进一步控制汽车噪声提供依据。试验结果表明:传声器阵列技术能够快速有效地进行汽车噪声源识别和定位。

With people＇s increasing concern on vehicle noise and strict control of vehicle noise limits standard, decreasing vehicle noise has become an important and urgent task in automotive industry development. Based on uniform circular microphone array technology and using MUSIC spatial spectrum estimation algorithm, noise source is identified according to different speed with customized state so as to find main noise source and distribution characteristics of acoustic field. It provides reference for further control of vehicle noise. The test results showed that the microphone array technology can identify and position the noise source quickly and efficiently.