Subjective and Objective Evaluation of High-Speed EMU Interior Sound Quality Preference and Correlation Analysis

Abstract

Taking a high-speed electric multiple unit (EMU) train as the research object, the noise samples of vehicle at different speeds are collected, the subjective evaluation experiments of sound quality preference are conducted using paired comparison method. After calculation and analysis of the main psychoacoustic parameters of each sample, it can be found that the sound quality preference in EMU decreases with the increasing of speed. SPSS are used to analysis the multivariate linear relationship of preference and objective parameters in EMU. It can be found that the relationship between preference and objective parameters are linear negatively. The preference has obvious strong linear relationship with loudness and sharpness, which show that sound quality in EMU is closely related to loudness and sharpness. The mathematical fitting model between subjective assessment of preference and objective parameters is established by calculating loudness and sharpness. Then through the comparative analysis of the sound quality preference curve from evaluation model and experiment, the evaluation results of the overall sample has strong consistency with the evaluation results of the traditional method of paired comparison. It can be used to predict and calculate the interior sound quality of EMU.