Interior Noise Analysis in the Compartment of a New Type Sleeping EMU Based on Psychoacoustic Parameters

doi:10.3901/JME.2018.04.222

Abstract

Abstract: Interior noise in the compartment of a new type sleeping EMU is measured on an operating line. Based on the psychoacoustic parameters including loudness, sharpness, fluctuation strength and roughness, sound quality characteristics of different types of sitting and lying in the compartment are analysed. The interior noise sources based on psychoacoustic parameters are identified. The results show that, the main differences between lying on the upper and lower berth are loudness and fluctuation strength, and there are a few difference in sharpness and roughness. The sound quality distribution characteristics of lying on the upper and lower berth are similar between the left ear and the right ear. However, the differences between lying on the upper and lower berth of the right ear are bigger than that of the left ear. When sitting and lying on the lower berth, the sound quality distribution characteristics of different ears are quite different. There is dominant difference in loudness of the left ear, while there is a big difference in sharpness of the right ear. The loudness source is mainly located on the window and roof. The sharpness source is mainly located on the floor. This work provides a theoretical base for the optimization of interior noise in the compartment of sleeping EMUs.

Key words: loudness, noise, noise identification, psychoacoustic, sleeping EMU, sound quality

CLC Number:

U270

ZHANG Jie, XIAO Xinbiao, YAO Dan, FU Rong, ZHANG Jun. Interior Noise Analysis in the Compartment of a New Type Sleeping EMU Based on Psychoacoustic Parameters[J]. Journal of Mechanical Engineering, 2018, 54(4): 222-230.

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