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为提升某乘用车急加速排气噪声运动感声品质,针对具有运动感声品质的汽车加速排气阶次噪声频谱特征及其结构实现方法开展研究.以原车加速排气阶次噪声频谱特征为基础,利用穷举法调制出若干声音样本,经主观评价确定运动感排气噪声目标样本;分析其2,4和6阶噪声相较原车变化特征,确定其在频率上的调整方案,再以此为目标对排气系统结构进行改进设计,实现上述频率段上声压级的调校.经实测与主观评价,改进方案的加速排气噪声运动感声品质评分提升至7.4,加速过程声品质运动感特征显著.研究表明:通过排气系统结构设计对阶次噪声频谱特征进行调校,可实现汽车加速排气噪声运动感声品质提升.
In order to improve the sensory quality of a passenger car for accelerating exhaust noise, this paper studies the frequency spectrum and the structure of the accelerating exhaust gas with motion-sensitive sound quality, Characteristics of the basis of the use of exhaustive method to prepare a number of sound samples, subjective assessment to determine the sense of sport exhaust noise target samples; analysis of its 2,4 and 6 noise compared to the original car changes in the characteristics to determine its frequency adjustment program , And then take this as the target to improve the design of the exhaust system structure to achieve the sound pressure level of the above-mentioned frequency tuning.According to the measured and subjective evaluation, the improved program of accelerated exhaust noise movement sense of sound quality score increased to 7.4, accelerated The sound quality of the process has significant movement characteristics.The research shows that the spectral characteristics of the order noise can be adjusted through the structural design of the exhaust system, which can improve the sound quality of the acceleration noise of the vehicle during acceleration.