摘要
在某微型车的通过噪声测量的改进中,采用一种主观评价分析与客观数据测量相结合的方法,来识别出主要声源,并进行了频谱分析。根据空气中声音随传播距离衰减原理和声能叠加原理,计算出排气系统对总的通过噪声的贡献量,确定了排气系统噪声就是最大的通过噪声源,用较少的试验次数,较低的成本,就识别出主要声源来自排气系统,然后提出了排气消声系统的改进方案,使通过噪声达到国家标准规定的限值范围内。
The objective measurements and subjective evaluation were combined to identify the pass-by noise sources and the Spectrum was analyzed in the research of reducing the pass-by noise of some mini bus.The scale of pass-by noise coming from exhaust system in the total pass-by noise was calculated on principles that the sound will decline with the distance becoming longer,and that the sound energy can be added with each other.In this way,with fewer experiments and less cost,the exhaust system was determined to be the main noise source.At last,we raised a program to improve the muffler and made the pass-by noise locate in the national standard..
出处
《装备制造技术》
2010年第12期15-19,共5页
Equipment Manufacturing Technology
关键词
通过噪声
排气系统
消声器
主观评价
声源识别
远场
近场
pass-by noise
exhaust
muffler
subjective evaluation
noise Source Identification
far field
near field
