CAJ | 학술논문

　　编写Matlab程序生成不同频率和声级的单频噪声（模拟增压器噪声），分别加入到同一汽车背景噪声中，合成24个声样本。对这些声音进行主观评价实验，听者用分数来评价背景噪声中单频声的可听见性和可接受程度。对主观评价分数与对应的单频噪声高出背景噪声的分贝数之间、前者与对应的单频噪声的音噪比之间作相关和回归分析，由此得出增压器噪声的限值，作为产品质量控制的参数之一。
　　편사Matlab정서생성불동빈솔화성급적단빈조성（모의증압기조성），분별가입도동일기차배경조성중，합성24개성양본。대저사성음진행주관평개실험，은자용분수래평개배경조성중단빈성적가은견성화가접수정도。대주관평개분수여대응적단빈조성고출배경조성적분패수지간、전자여대응적단빈조성적음조비지간작상관화회귀분석，유차득출증압기조성적한치，작위산품질량공제적삼수지일。
A program for generating single-frequency noise was written using MATLAB code. The 24 pure tones of different frequencies and sound pressure levels were generated using this program to simulate the turbocharger’s noise. Then these pure tones were respectively added to the background noise recorded in the cab of a modern car to synthesize 24 sound samples. Subjective evaluation experiment was carried out on these samples, in which scores between 1 and 10 were given by the auditors to evaluate the detestableness and acceptableness of the pure tones in the background noise. Finally, for each sound sample, the subjective evaluation was compared with the power-spectral-level difference between the pure tone and the background noise, and also compared with the ratio of the pure tone to the noise. The corresponding correlation and regress analyses were conducted. And the limitation value of the turbocharger’s noise was obtained. From this study, the criteria for controlling turbo noise can be established.