本文利用声场分析技术和谱分析技术对轻型客车的车内噪声进行了测试分析，识别出车内噪声的主要噪声源。

By means of the techniques of noise field analysis and spectrum analysis, the noise inside a light bus was measured and analyzed, and the main noise source was identified.

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因此，研究客车车内声传递规律，识别主要噪声源，进一步研究有效的噪声控制措施具有重要意义。

So, it is important to study on the regularity of sound transmission in bus cavity and identify the major noise source and investigate the efficient corrective to control noise.

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针对某轿车车内异常噪声现象，通过道路试验进行了噪声源识别，发现发动机的进气系统是异常噪声的主要来源。

Aiming for interior abnormal noise in one sedan, the main noise source which is engine intake system is identified by road experiment.

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