噪声与振动控制Issue(2)：212-215,4.DOI:10.3969/j.issn.1006-1335.2014.02.049
汽车前围板隔声量测定及改进
Measurement of Transmission Loss and Improvement of Structure of a Car’s Dash Panel
杨洋 1褚志刚 2袁苗达 1段妍1
作者信息
- 1. 重庆工业职业技术学院 车辆工程学院，重庆 401120
- 2. 重庆大学 机械工程学院，重庆 400044
- 折叠
摘要
Abstract
The transmission loss of a car’s dash panel is measured based on reverberation-room and anechoic-room method of sound intensity testing. Results show that the change-over valve for the inside cycle and the outside cycle at the air inlet of the air conditioner is primarily the acoustic weak link because of its poor fit with the valve port. On this basis, some sealing material is pasted between the valve’s body and the valve’s port. Besides, the original acoustic material, EVA+ Low Melting Point Felt, is replaced by EVA+ Low Melting Point Felt+ Bi-component acoustic material. Measurement results show that the transmission loss of the car’s dash panel is raised by about 7 dB in average in 500~6 300 Hz frequency range. This work is of great significance in the improvement of the sound insulation property of the dash panel and the acoustic environment in the car.关键词
声学/隔声量/声强/改进Key words
acoustic/transmission loss/sound intensity/improvement分类
通用工业技术引用本文复制引用
杨洋,褚志刚,袁苗达,段妍..汽车前围板隔声量测定及改进[J].噪声与振动控制,2014,(2):212-215,4.
