汽车制动工况下车内时变噪声响度特征  

Loudness Characteristics for Vehicle Interior Time-Varying Noise Under Braking Condition

作　　者：刘程[1] 贺岩松[1,2] 于海兴[1] 刘建立[1] 

机构地区：[1]重庆大学机械工程学院,重庆400030 [2]重庆大学机械传动国家重点实验室,重庆400030

出　　处：《汽车工程学报》2013年第1期40-46,共7页Chinese Journal of Automotive Engineering

基　　金：国家自然科学基金项目(50975296);重庆市科技攻关项目(cstc2012gg_yyjs60001)

摘　　要：汽车车内噪声对驾驶员和乘员的舒适性有重要影响,因此研究基于人耳的汽车制动工况下车内时变噪声响度特征具有重要意义。对Moore时变响度模型的计算方法进行了详细研究,在Matlab中建立其模型并验证了模型的正确性。然后建立了汽车制动工况下车内噪声测试系统,获得了某款混合动力城市客车制动工况下乘员耳旁降噪前、后的噪声,并以此噪声为研究对象,对比分析传统时频方法、Zwicker和Moore特征响度分析方法的异同点。结果表明,特征响度比时频分析方法更能准确反映影响人响度感受的车内噪声来源;短期响度能够反映人的响度感觉,但最大值并不能全面反映汽车车内噪声的响度特征;Moore响度模型比Zwicker响度模型频率分辨率更高且能量分布更为集中。Have an important impact on the driver and passengers comfort of the vehicle interior noise, therefore the analysis of loudness characteristics for vehicle interior time-varying noise under braking condition has important significance. The calculation method of time-varying loudness based on Moore model was studied. The accuracy of this model is verified with Matlab. A test system of vehicle interior noise was also built and used to test the crew ear side noise befbre and after noise reduction for a hybrid city bus under braking condition, the noise was taken as the research object, and a comparative analysis of the traditional time-frequency method, Zwicker and Moore characteristics loudness analysis method was completed to find the similarities and differences between them. The results show that Zwicker and Moore specific loudness model can reflect the source of vehicle interior noise which impacts on human loudness perception more accurate than time-frequency analysis; short-term loudness can reflect human loudness perception, but the maximum of loudness is not able to completely reflect the noise loudness characteristics of vehicle interior noise; compared with Zwicker loudness model, Moore loudness model has a higher frequency resolution and its energy distribution is more concentrated.

关 键 词：Moore时变响度模型 噪声测试系统 制动噪声 特征响度 噪声来源 

分 类 号：U467.51[机械工程—车辆工程]