用主动噪声控制法改善车内声品质

以从4种类型轿车内采集到的16个不同噪声样本为评价对象，通过主观评价试验和统计分析计算建立了以心理声学客观参数描述主观评价结果的车内声品质分析模型，确定了稳态工况下车内噪声品质的主要影响因素为响度和尖锐度。并依此对声品质最差的两个样本实施了主动控制试验。试验结果表明，车内噪声的响度、尖锐度均减小。应用所建立的声品质模型进行计算，并结合二次主观评价试验结果验证声品质改善效果，两种方法均显示声品质烦躁度等级下降了5级左右，证明了主动控制方法用于改善汽车声品质的可行性和有效性。

Improving sound quality inside vehicle by active noise control method

Taking 16 in-vehicle noise samples acquired from 4 types of car under different conditions as evaluation objects, by means of the subjective evaluation test and the statistical analysis, a sound quality model was built to describe the subjective evaluation level by the objective psycho-acoustical parameters. It was found that the key factors affecting the in-vehicle sound quality under the steady conditions are the loudness and the sharpness. The active noise control experiments on the worst 2 noise samples were performed, and the results show that the loudness and the sharpness of the invehicle noise were both reduced. The improvement of the sound quality was confirmed by calculation using the established model and 2 subjective evaluation tests, the annoyance level of the sound was decreased by about 5. The active noise control is proved to be feasible and effective in the vehicle sound quality improvement.