Sound quality analysis of a passenger car based on electroencephalography

This paper presents the correlation between psychological and physiological acoustics for automobile sounds. The purpose of this paper is to evaluate the quality of the interior sound in passenger cars based on electroencephalogram (EEG). Previous objective evaluation method of sound quality involved the use of sound metrics based on psychological acoustics. The proposed method employed not only the psychological but also the physiological acoustics. In this work, the sounds of seven premium passenger cars were recorded, and they were evaluated subjectively by 33 people. The correlation between the subjective rating and the sound metrics was calculated based on psychological acoustics. Finally, the correlation between the subjective rating and the brain EEG was also calculated. Based on these results, a new evaluation system for evaluating the quality of the interior sounds of passenger cars was developed based on bio-signals.