轿车声品质主观评价研究

轿车的声品质理应取决于客观的噪声测试结果，但也和人为对噪声特征的感知程度切切相关，两者经常不会同步吻合。因而对人所感受的轿车声品质进行科学的主观评价试验就显得十分重要。通过采集6款轿车的车内外声音信号并进行筛选，作为声品质主观评价的样本库，根据不同频段声音信号表现不同特性的特点，对样本信号进行分频段预处理；通过试验确定出进行声品质主观评价试验的主体最佳的男女比例为3/1；选取对评价主体要求较低的成对比较法对轿车声音样本进行声品质主观评价试验。研究结果表明：对轿车声音特性影响最大的频段为500～4 000 Hz频段，其次是20～150 Hz频段，4 000 Hz以上频段对其影响最小。

Study on Subjective Evaluation of Vehicle’s Sound Quality

As for M1 class vehicle sound quality, this paper first proposed subjective evaluation test by considering the subjective feelings. First, collected a large number of sound signals of vehicles as for the database of sound quality evaluation, collected a large number of sound signals as for the database of sound quality evaluation, according to different frequency bands of sound signals show different characteristics, sound signals were divided to different frequency band. Then determined the best proportion of male and female while do subjective evaluation test. And then did sound quality subjective evaluation test by specific paired comparison. Finally, analyzed the test results and obtained: M1 class vehicle sound characteristic is most influenced by the frequency band 500-4000Hz, followed by 20-150Hz, the frequency band above 4000Hz has minimal impact.