汽车声品质技术研究.pdf

学兔兔 汽车实I{]技术 20l 5年第8期 设计研究 AUTOMOBILE APPLIED TECHNOL0GY 2Ol 5 N0．8 汽车声品 质技术研究 魏兆平 (中国汽车技术研究中心汽车试验研究所，天津 300300) 摘 要：为了降减汽车噪声危害需提高声品质，应分析减振、隔声、吸声材料和消声器技术性能，要做车身气密和 轮胎噪声试验，以消除共振和共鸣峰值噪声；消声室数采发动机振动噪声和定位噪声源，测量声源声级、响度、波 长和频率，噪声经频谱分析滤掉刺耳声频，不同相位、波长和功率噪声匹配传出低声级悦耳声音，提高汽车NVH 性能和人类安全工作效率。 关键词：共鸣噪声；吸声材料和消声器；消声室；声品质技术；声源晌度 中图分类号：U463．9 文献标识码：A 文章编号：1 671—7988(201 5)o8—33—03 A Study On Technology Of Vehicle Sound Quality Wei Zhaoping (Aotomotive Testing Research Institute Of China Aotomotive TechnologyResearch Center,Tianjin 300300) Abstract：In order to decrease hazard of vehicle noise which needs improving sound quality,we should analyze technical performance of materials of vibration reduction and sound insulation and sound absorption and silencer,we need making a test of vehicle body airtight and tire noise，to eliminate sympathetic vibration and the resonance peak noise；through data collectin s~tem aquiring vibration noise of engine and positioning noise source in anechoic chamber,measuring noise level and loudness and wave length and frequency for sound source，noiser will be analyzed by frequency spectrum and filtrated ear-piercing audio frequency,noiser of different phase and wave length and power should be matched up to emit low sound level and musical sound,to improve vehicles perform ance of Noise Vibration and Harshness and mankind safe working efficiency． Keywords：Resonance noise；Material of sound absorption and silencer；Anechoic chamber；Technology of sound