철도소음 분석방법 및 불쾌감 평가에 적합한 라우드니스 모델 비교

초록

It is certain that the measurement and analysis of noise are the most important issue in assessing the impact of noise on people. In previous study, it was identified that the response in frequency domain is different between a binaural signal measured by dummy head signal and a monaural signal and it is resulted form physical phenomena such as diffraction and refraction. Also, the loudness is known for an appropriate index in evaluating the sound quality and is standardization for steady sounds. In the present study, railway noise was recorded using dummy head on the basis of binaural effect and those signals’ specific loudness on critical-band rate were calculated and compared with frequency analysis. In addition, a statistical analysis by linear regression model was conducted to get the correlation between subjective annoyance and loudness models. As a result, the Zwicker’s loudness(ISO532) showed significance level with railway noise higher than time-varying loudness model.