基于声品质评价模型的车内噪声优化研究

噪声被动控制方法能简单有效地改善噪声的声品质。首先对8辆各种型号汽车进行了怠速状态下车内噪声样本的采集,通过噪声信号的主客观分析研究,得出车内噪声评价的主客观评价模型,明确了响度、尖锐度及粗糙度是影响怠速状态车内声品质的主要因素。而后,对声品质最差的7号车实施噪声优化试验,采取添加塞丽隔声阻尼毡的方案。通过对比发现,车内噪声的响度等参量值变小。将数据代入声品质客观计算模型,同时进行主观评价试验,结果表明其评分等级从13级降至10级,从而证明了噪声被动控制方法能有效提高车内噪声的声品质。

Improvement of Inner-vehicle Sound Quality Based on Sound Quality Evaluation Model

Passive control noise technology inner-vehicle noise samples at idle speed were can improve inner-vehicle noise effectively. Firstly 8 acquired from 8 vehicles of various types of cars. Based on the subjective and objective analysis of noise samples, the correlation between subjective evaluation and objective parameters was formed： the loudness, the sharpness and the roughness of sound are the most important factors influencing the inner-vehicle sound quality. The passive noise control experiment specific to the worst noise sample was conducted, and through the comparison, the objective parameters were reduced significantly. By using objective calculation model and subjective evaluation test, the annoyance level fell from 13 to 10, which demonstrates that the noise control method can effectively enhance sound quality in the vehicle.