철도차량 소음에 대한 음압레벨과 음질지수 비교 평가

초록

Recently attempts to reduce annoyance due to noise considering auditory sensation have been made for many products comparing to previous attempts to reduce sound pressure level. The A-weighted sound pressure level also reflects auditory characteristics of a human being, however, subjective feelings of a human being depends not only on frequency spectrum but also on other factors such as noise level, frequency bandwidth, and attenuation. Therefore indices such as loudness, sharpness, roughness are proposed to consider subjective feelings and they are used to develop a parameter to optimize sound quality of different products. This paper evaluates and compares sound pressure level and sound quality indices for high-speed train noise and analyzes their characteristics. Subjective tests will be carried out using the evaluated indices to develop a parameter representing annoyance of train noise.