System for detecting influence of structural transfer path on sound quality of passenger compartment

Abstract

The invention discloses a system for detecting influence of a structural transfer path on sound quality of a passenger compartment, comprising an excitation acquisition module, a sound quality prediction module, a structural transfer path identification module, and an optimization design module. The excitation acquisition module confirms a vibration excitation source and collects excitation signals. The sound quality prediction module collects noise signals of the passenger compartment, performs subjective evaluation, and calculates psychoacoustic parameters, and is used to establish a prediction model of the sound quality of the passenger compartment. The structural transfer path identification module is used to confirm the transfer path between the vibration excitation source and the noise of the passenger compartment, the calculation of a transfer function of each transfer path and contribution calculation of each path to a sound quality evaluation result. The optimization design module is used to analyze the effect of the transfer function of the main transfer path on the sound quality. By applying an optimized design method, the characteristic parameters of relevant structuresin the path are improved, and the transfer function that can improve the sound quality is obtained.

Description

technical field [0001] The invention relates to the field of vehicle comfort research, in particular to a structural transmission path detection system for sound quality in a passenger room. Background technique [0002] The vibration and noise of the mechanical system are superimposed by multiple excitations arriving at the target position through different transmission paths. In order to better diagnose and optimize vibration and noise, it is necessary to comprehensively consider the conditions of each excitation and transfer path, and transfer path analysis (TPA: Transfer Path Analysis) is an effective method. [0003] Sound quality is a description of the nature of sound, reflecting people's subjective feelings about sound events. Refers to the auditory perception process of the human ear, and then people make subjective judgments based on their own perception. After the researchers proposed the concept of sound quality, they successively proposed objective parameters ...

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Problems solved by technology

[0004] Studies have shown that: sound pressure level (A, B, C weighted) as the main objective parameter for evaluating noise cannot accurately reflect people's subjective perception of noise. The detection of the contribution of the pressure level, and optimize the design on this basis, but the research on the contribution of the sound quality is still in the exploratory stage

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