不同关门力度下乘用车关门声声品质评价
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重庆市基础与前沿研究计划项目(CSTC2015JCYJBX0075)。


The evaluation of sound quality for automotive door closing sounds with different closing force
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    摘要:

    针对在主观偏好性试验中关门力度对听审者的主观评价有很大影响这一问题,考虑轻、重关门力度对声品质评价的影响,提出了一种新的关门声声品质评价参数——SE(sharpness-energy)。即利用二次EEMD分解和Wigner-Ville分布得到样本的能量分布,参考尖锐度计算公式推导得到SE计算公式,并将其归一化为百分制,SE突出了高频成分对声品质主观偏好性的影响。为验证参数SE的有效性,将该参数和主观评价结果进行相关性分析,结果表明当关门力度不同时,SE与样本评价结果相关性更高,SE比尖锐度能更准确地反映高频成分对声品质的影响。

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    The result of correlation analysis in the subjective preference evaluation illustrates that the strength used to close the automotive door influences the judgment of sound quality seriously. So we acquired and studied the samples of the sounds from the driver's ears when a car's front door was closed heavily and lightly. And a new sound quality evaluation parameter named sharpness-energy (SE) was proposed. Firstly, energies of noise samples were calculated numerically based on dual ensemble empirical mode decomposition (EEMD) and Wigner-Ville distribution. Then SE was acquired through the calculation formula of sharpness. Finally, SE was normalized to a centesimal system. SE underlines the influence of high-frequency component in the judgment of sound quality. In order to verify the validity of the extraction process, we carried out a correlation analysis between SE and subjective evaluation results. The results illustrate that the SE method acquires better performance than sharpness when evaluating the sound of closing door.

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徐中明,吴丹,夏小均,贺岩松,张志飞.不同关门力度下乘用车关门声声品质评价[J].重庆大学学报,2017,40(1):11-19.

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  • 收稿日期:2016-08-10
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  • 在线发布日期: 2017-01-16
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