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(sharpnessenergy)。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。
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.
作者
徐中明
吴丹
夏小均
贺岩松
张志飞
XU Zhongming WU Dan XIA Xiaojun HE Yansong ZHANG Zhifei(The State Key Lab of Mechanical Transmission, Chongqing University, Chongqing 400044, P.R.China College of Automotive Engineering, Chongqing University, Chongqing 400044, P.R.China)
出处
《重庆大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2017年第1期11-19,共9页
Journal of Chongqing University
基金
重庆市基础与前沿研究计划项目(CSTC2015JCYJBX0075)~~
关键词
魏格纳-维尔分布
聚合经验模态分解
偏好性
主客观评价
声品质
Wigner-Ville
EEMD（ensemble empirical mode decomposition）
preference
subjective and objective evaluation
sound quality
