车辆主动声浪研究与实现  

Research and Implementation of Active Sound System in Vehicle

作　　者：李博学[1] 张红川 Li Boxue;Zhang Hongchuan(R&D Center of Great Wall Motor Company,Hebei Auto Technology Innovation Center,Baoding 071000)

机构地区：[1]长城汽车股份有限公司技术中心,河北省汽车技术创新中心,保定071000

出　　处：《中国汽车》2023年第6期33-37,共5页China Auto

摘　　要：本文介绍了车辆声浪模拟系统的合成算法与基本硬件组成。其中谐波合成算法与粒子合成算法为两种常见的主动声浪合成算法,谐波合成算法是通过正弦波来模拟不同阶次,最终将所有正弦信号线性叠加进行合成。粒子合成算法是将采集声源在时域下按照发动机发火特性将全转速段声音分割成细小的声音片段,再按规则建立索引及转速关联,最终通过索引调用进行合成。本文以某纯电动车为例,介绍了车辆主动声浪所需硬件,并通过谐波合成算法进行了主动声浪的实车验证,结果表明实时合成声浪与原始声源相似度较高,实车主观评价效果理想。This paper introduces the sound wave synthesis algorithm and basic hardware composition of vehicle sound simulation system.The harmonic synthesis algorithm and particle synthesis algorithm are two common active sound wave synthesis algorithms.The harmonic synthesis algorithm simulates different orders through sine waves and finally synthesizes all sine signals linearly.The particle synthe-sis algorithm segments the collected sound source into small sound fragments according to the ignition characteristics of the engine in the time domain,and establishes an index and speed correlation according to the rules.Finally,the index call is used for synthesis.Taking a certain pure electric vehicle as an example,this article introduces the hardware required for vehicle active sound wave,and validation the real vehicle's active sound wave through harmonic synthesis algorithm.The results show that the real-time synthesized sound wave has a high similarity with the original sound source,and the subjective evaluation effect of the actual vehicle is ideal.

关 键 词：主动声浪 声音合成 谐波合成 粒子合成 

分 类 号：TP3[自动化与计算机技术—计算机科学与技术]