用选择性声强技术识别车内噪声及其成因

识别车内噪声的方法有许多。其中,将测试部位噪声信号作为参考信号,与噪声源的声强进行相关分析以确定声源的位置和响应频谱的方法称为选择性声强技术。本文运用此技术,通过对国产轿车给定工况下的测试分析,确定出试验车发动机舱内最大噪声的位置和驾驶员耳旁辐射噪声产生的原因,为进一步降低该车噪声提供了参考依据。

Analyze Reasons of Vehicle Interior Noises with The Selective Sound Intensity Technology

There are many methods to identify vehicle interior noises.Of which,it is known as the selective sound intensity technology that correlation analysis of intensity of noise sources is done by taking the noise signals on testing location as the reference signal to determine noise source and response frequency.In the paper,the technology is applied in testing analysis of one domestic passenger car under the given conditions to determine the max.noise source in the engine room and to find out the reasons for radiant noises near driver's ear.These are references for reducing noises.