Speech Intelligibility Index in Objective Evaluation of Vehicle Interior Noise

摘要

The research on objective evaluation of sound quality is a very important application. It aims topropose objective guidelines or characterizing its noise quality, and a valuable tool for theproduct sound design. Along with the development of the noise control technology, theresearch on noise quality has being paid more and more attentions, especially in the fields ofautomobile and household appliance in China. With loudness-adjusted vehicle interior noise assound stimuli, research on objective evaluation and analysis methods for sound quality ofloudness-adjusted vehicle interior noise is made. Based on subjective experiment and analysis,the effect of characters of physics-acoustics, psychoacoustics and statistics on evaluation of sound quality is investigated. In the study, multivariate linear regression can be used to extractless information redundancy and larger interpretive feature from too many parameters at a fewsamples condition. It’s found that along with sharpness and average special loudness, speechintelligibility index exert major effect on evaluation of vehicle interior noise quality. Based onpair-wise comparison of 15 samples, preference mode is established. And the mode is validatedby data from semantic differential method of 40 samples. The preference mode proposed bythis disquisition has better goodness of fit.