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| Study on Influencing Factors of Location Deviation of Sound Transmission Path in Anechoic Chamber Calibration |
| RUAN Zhangfeng1,GU Chengcheng1,CHEN Haiyong1,DING Jijie2,MENG Ziwei2 |
1. Shanghai Institute of Quality Inspection and Technical Research, Shanghai 200233, China
2. School of Mechanical and Power Engineering, East China University of Science and Technology, Shanghai 200237, China |
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Abstract Anechoic chamber acoustic measurement is an important means to measure the acoustic characteristics of products, and its performance directly affects the accuracy of relevant acoustic tests. The accuracy of measurement process is not only limited by theoretical calculation, but also affected by practical measurement process. Due to the dead weight of the sound transmitting device and the wire rope, the sound transmitting path is deformed from an ideal straight line to a curve, which affects the accuracy of the acoustic performance measurement. Therefore, it is particularly important to calibrate the sound transmission path of anechoic chamber. Finite element simulation focuses on the influence of rope length, tightness and inclination on the sound transmission path, verifies the accuracy of the simulation model through corresponding experiments, and studies the specific influence of different parameters on the sound transmission path through lateral comparison of parameters. Aiming at the study of parameters on the deviation of sound transmission path, a way for the calibration of sound transmission path error from multiple perspectives is provided, which is helpful to improve the accuracy of anechoic chamber measurement device and promote the development of high-precision automatic calibration system of anechoic chamber to a certain extent.
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Received: 30 December 2022
Published: 03 April 2024
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| Fund:Scientific research project of Shanghai Institute of Quality Inspection and Technical Research |
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2024, Vol. 45 
