基于相关分析的车内声品质偏好性评价模型

Vehicle interior sound quality preference evaluation model based on correlation analysis

以四种类型轿车在不同档位和不同车速下匀速行驶时副驾驶员耳旁噪声信号采集样本为评价对象,利用成对比较法对车内声品质进行了主观评价试验;分析计算了各噪声信号样本的主要心理声学客观参数,应用双耳声压级频谱合成的方法对左右耳响度进行加权,得出双耳响度与声品质主观评价结果的相关系数比单左耳高出0.107,证明了双耳响度客观评价模型更加接近人的主观评价;通过相关分析和多元回归分析的方法,建立了车内声品质偏好性评价模型,对评价模型研究表明,稳态工况下轿车车内声品质主要受响度和尖锐度两个心理声学参数影响。

Interior noise samples in the assistant driver ear's position from four types of cars at different gears and velocities were selected as the evaluation objects.Subjective evaluation test of sound quality was carried out with the paired comparison.Several primary psycho-acoustical objective parameters of these samples were calculated.Applied the binaural sound pressure level spectrum synthesizing method to weight the left and right ear loudness,the correlation coefficient of the binaural loudness and sound quality subjective evaluation result are higher 0.107 than that of left ear loudness,proved that the binaural loudness objective evaluation model is more nearly the subjective evaluation result.By way of correlation analysis and multi-dimensional regression analysis,the equation between subjective evaluation level and psycho-acoustical objective parameters was gained.The research results indicate that vehicle interior sound quality preference under the stable state condition is affected by two psycho-acoustical parameters of loudness and sharpness.