燃料电池汽车低频噪声声品质分析

对采集到的燃料电池车(fuel cell vehicle,FCV)车内外噪声经过低通滤波器处理,提取了20—150 Hz声音信号;基于Zwicker模型计算得到客观评价指标,并采用成对比较的主观评价方法对噪声样本进行主观评分;运用主客观参量之间线性相关分析建立低频声多元线性回归声品质分析模型,更为准确地评价了FCV低频噪声声品质。

Analysis of Sound Quality of Low-frequency Noise for Fuel Cell Vehicles

The internal and external noises of a fuel cell vehicle（FCV） are collected.Considering that low frequency noise occupies a large amount of energy,the noise signals in the range from 20Hz to 150Hz are extracted through the low-pass filter.Then,based on Zwicker model,the objective evaluation index is calculated.The score of subjective evaluation of the noise sample is given by means of the paired comparison method.Finally,the multiple linear regression model for low-frequency sound quality analysis is established according to the linear correlation between subjective score and objective index,in order to get more accurate evaluation of sound quality of FCV noise in low frequency range.