Analysis on Correlation between Objective Parameters and Subjective Evaluation of Sound Quality of High Speed Passenger Train

The HMSⅢ biauricular signal collector of the noise and vibration analysis system was used to extract objective parameters of sound quality including loudness,sharpness,roughness and so on and to carry out objective evaluation.It is concluded that the A-weighting network significantly attenuates the sound pressure level(SPL)of noises in the low frequency range.So noises are underestimated in the low frequency range in high-speed passenger cars.In addition the high frequency components(sharpness)has great influence on subjective feeling of human ears,as a result,even when noises inside high-speed passenger cars satisfy the requirements of A-weighting SPL,the noise transmission mechanism cannot accord with the distribution rule of the sound field,which will cause deviation to vibration and noise reduction design of high-speed passenger trains.The results show as follows:The sharpness of noises inside general carriages of high-speed passenger trains demonstrates an intensifying tendency with raizing of train speeds;but the roughness changes little when train speeds are raized.The study provides reference to design of vibration and noise reduction of high-speed passenger trains.