Research and Application of Contribution Rate of Acoustic Transfer Function in Vehicles

How to quickly identify weak areas and design redundancies in vehicle acoustic package design is an industry challenge. To address this issue, this paper investigates the relationship between acoustic parts and acoustic transfer function of vehicle. The contribution rates of each acoustic part to acoustic transfer function are calculated, and the area with the highest contribution rate is the weak area of the acoustic package. The area with the lowest contribution rate based on vehicle positioning can be identified as design redundancy. Firstly, establish a three-level architecture of acoustic transfer function - system - acoustic parts, determine the relationship formula between adjacent levels, and then establish the contribution rate relationship formula. Through simulation method, the contribution rate of each acoustic part to acoustic transfer function is obtained. Through test method, the contribution rate of each system to acoustic transfer function is analyzed. And optimize acoustic part and system with the highest contribution rate, improve the transfer function, and verify the feasibility of contribution rate analysis method.