Vehicle interior sound quality preference evaluation model based on correlation analysis

Interior noise samples in the assistant driver ear's position from four types of cars at different gears and velocities were selected as the evaluation objects.Subjective evaluation test of sound quality was carried out with the paired comparison.Several primary psycho-acoustical objective parameters of these samples were calculated.Applied the binaural sound pressure level spectrum synthesizing method to weight the left and right ear loudness,the correlation coefficient of the binaural loudness and sound quality subjective evaluation result are higher 0.107 than that of left ear loudness,proved that the binaural loudness objective evaluation model is more nearly the subjective evaluation result.By way of correlation analysis and multi-dimensional regression analysis,the equation between subjective evaluation level and psycho-acoustical objective parameters was gained.The research results indicate that vehicle interior sound quality preference under the stable state condition is affected by two psycho-acoustical parameters of loudness and sharpness.