Method for objectively and quantifiably evaluating noise fret degree in vehicle based on auditory model

Abstract

The invention relates to a method for objectively and quantifiably evaluating noise fret degree in a vehicle based on an auditory model, in particular to an evaluation method of psychoacoustics and vehicle sound quality. The method comprises the following steps: designing a dummy head model; imitating a processing mechanism of the middle ear and the inner ear of a human body to the sound by usingan auditory peripheral calculation model; collecting vehicle noise signals under the working conditions of uniform, accelerated and idle speed; pre-treating the noise sample and processing the loudness in specification; obtaining a psychoacoustics parameter by using a sound quality calculation model; obtaining subjective evaluation result test data by using a grouped and paired comparison method;calculating and painting a correlated scatter plot chart between each parameter and the ranking value of the subjective evaluation result; and analyzing and calculating to obtain the objectively quantifiable model of the subjective fret degree under each working condition. The invention can realize the psychoacoustic parameter calculation of objectively evaluating the sound quality with differentvehicle types, gears and speeds, wherein the calculated value has good pertinence and consistency with the evaluated result of the subjective evaluation method. The invention has stable evaluated result and high reliability, and can improve the sound quality and competitiveness of vehicles combined with the design of new CAE cars.

Description

technical field

[0001] The invention relates to psychoacoustics and a car sound quality evaluation method, in particular to a psychoacoustic sound quality objective evaluation method of vehicle interior noise. Background technique

[0002] Sound quality reflects people's subjective perception of sound. Currently, existing testing instruments and related methods cannot directly measure this index, but sound quality can be described by directly measured and calculated psychoacoustic parameters. These parameters can reflect different The objective physical parameters of the difference in subjective experience caused by the sound signal, and at the same time, it can also comprehensively consider the human body's psychological response mechanism and acoustic perception characteristics. Therefore, the desired objective evaluation of sound quality is a method capable of analyzing, processing and evaluating sound quality of any sound signal, and calculating relevant psychoacoustic p...

Images