基于听觉相关量的怠速噪声诊断与声品质优化

Diagnosis of Idle Noise and Optimization of Sound Quality Based on Auditory Correlative Quantity

针对某自主SUV怠速时车内噪声较大、声品质较差的问题,利用听觉相关量分析得到声音采样中最易被人耳察觉的频率成分,采用噪声源分离方法查找噪声源并进行整改。采取性能优化措施后的测试数据表明,车内怠速N挡空调关工况声压级从43.86 d B(A)降低至37.5 d B(A),已达到同级别合资品牌SUV车型优秀水平,车内声品质主观评价得分提高。

A homemade SUV is diagnosed with high interior noise and poor sound quality at idle speed, to solve this problem, we use auditory correlative quantity analysis to obtain frequency components from sound sample which is most perceivable by human ears, and use noise source separation method to identify sound source and rectify. With performance optimization, the test data show that the sound pressure level of at N- gear of idle speed with the air conditioner off decreases from 43.86 d B（A） to 37.56 d B（A）, which improves its sound level to excellent level of joint venture SUVs of the same class, and subjective evaluation score of interior sound quality is improved.