The Study Of Active Control On Car Interior Sound Quality

Car audio sound quality is the vehicle description of the nature,It reflects the vehicle occupant's perception of sound events。Proposal of the concept of sound quality,Actually propose a new concept of the modern noise control, what is that Noise control technology that is not only to reduce the noise level, but also able to adjust the sound characteristics, and at last realize selective noise control, Eliminate the restless noise in the overall composition,and retain its pleasant composition, So that the sound quality requirements meet the user's subjective. The subject on the basis of the study of sound quality, designed the Active control method to improve the sound quality inside the car. Details are as follows:1,The objective description of the four psychoacoustic parameters:methods loudness, sharpness, roughness and jitter degree,has been Proposed,and the method of Verifing the reliability and applicability of the results has also been proposed.2,This article designed the whole process of subjective evaluation tests with rating score,and proposed a complete process and methods for subjective evaluation results and psychoacoustic parameters of noise samples.Through multiple linear regression analysis, a mathematical model has been established which can describe the results of subjective evaluation with objective parametric psychoacoustic, and a variety of test methods has been given.3,Adaptive active control technology has been used to Select the adaptive active control algorithm for improving sound quality,on this basis, a sound quality Active Control System has been built,the preparation and configuration of the hardware and the software of system has been proposed,and the content and conditions of the Sound quality control tests has been given.