车内噪声低频特征模型研究

摘要

车内的低频噪声影响汽车的乘坐舒适性。为此以人工头双耳记录的车内噪声信号为研究对象，通过主观评价试验，并对结果进行分析。提取了影响车内噪声低沉度的特征参量，建立了以1/3倍频程声压级、锐度和粗糙度为变量的低沉度参量特征模型。采用两种不同的主观评价，结果表明，低沉度模型的预测结果与主观评价结果具有很高的相关性。%The internal low-frequency noise is an important measure of car’s riding comfort. In this paper, the character of car’s interior noise is studied. The internal noise signals are recorded by using binaural digital head. Results of subjective evaluation of the signals are analyzed. The characteristic parameters related to the low-and-deep noise inside the car are extracted. The characteristic model for low-and-deep noise parameters is established with the 1/3 octave sound pressure level, sharpness and roughness as the variables. It is found that results of perception of this model agree well with those resulted from the subjective evaluations.