Abstract
Even the overall level of vehicle interior noise of hybrid electric vehicle (HEV) reduced to a certain degree, the vibration and noise generated by the engine, motor, generator and power split have made greater effect on the vehicle interior sound quality in HEV. In order to research the feature of vehicle interior sound quality in HEV, the HEV is used to be the research object, the binaural noise sample of the driver when playing different kinds of music in the vehicle with the speed of sixty kilometers per hour is collected. ArtemiS is used to conduct frequency division processing, so as to obtain the relative weight of each frequency band and the overall noise. The tone, roughness and sharpness of sound quality subjective evaluation parameters are quantified, the SPSS is used to establish the linear regression model of the sample, and the best masking music tracks are found out. Then, the sound samples that contains the best music tracks and the simple vehicle interior noise are re-collected, the regression model and ArtemiS are used to predict the subjective evaluation value. The research results show that when adding the music, the tone degree rises and the lowering degree decreases, thus the disturbing degree reduces, which significantly improves the sound quality in the HEV.
Highlights
IntroductionMusic spectrum is completely different with the low frequency noise in vehicle
The strength of music in vehicle is usually higher than the noise level
In order to analyze the improvement degree of music on the vehicle interior sound quality, 24 tracks that are selected in accordance with the provisions are played in vehicle with the uniform speed condition of 60 km/h of hybrid electric vehicle (HEV) [4], and the 24 sound samples contain tracks and vehicle interior low frequency noise collected by SQuadriga I and binaural microphone are studied
Summary
Music spectrum is completely different with the low frequency noise in vehicle. These factors can effectively distribute the attention of people on the low frequency noise in vehicle, so as to improve the vehicle interior sound quality [1,2,3]. In order to analyze the improvement degree of music on the vehicle interior sound quality, 24 tracks that are selected in accordance with the provisions are played in vehicle with the uniform speed condition of 60 km/h of HEV [4], and the 24 sound samples contain tracks and vehicle interior low frequency noise collected by SQuadriga I and binaural microphone are studied. The study results provide theoretical guidance for improving the vehicle interior sound quality in HEV
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