加速行驶时车内噪声品质的评价方法及数学模型构建

开发了一种专门用于评价非稳态工况下汽车车内噪声品质的软件系统,并利用该软件对6类轿车从50km/h到120km/h加速时的车内噪声样本进行了主观评价试验,得到了每个样本的主观评价等级值。计算了各噪声样本的主要心理声学客观参数,并通过相关分析和多元线性回归分析,建立了以响度、粗糙度为变量的声品质的数学模型。对另外6个加速工况下的噪声样本进行了主观评价试验,以验证模型的准确性。结果表明,模型的评价结果与主观评价结果间具有很高的相关性,证明了所建模型的有效性。

Evaluation method and mathematical model of vehicle interior sound quality during acceleration

A software system was developed for subjective evaluation test of vehicle interior sound quality under non-steady driving condition.It was employed for the subjective evaluation of the interior noises of six types of cars during acceleration from 50km/h to 120km/h.The subjective rate of each sample was obtained by this software first.Then several primary objective psycho-acoustical parameters of these samples were calculated.Using correlation analysis and multi-dimensional linear regression analysis,a mathematical model of sound quality was established,in which the loudness and roughness were taken as the variables.The subjective evaluation test was carried out for other six samples under different acceleration condition to verify the accuracy of the proposed model.It was shown that there exists a strong correlation between the model evaluation result and subjective evaluation result,which validates the model.