Abstract：Anechoic chamber acoustic measurement is an important means to measure the acoustic characteristics of products, and its performance will directly affect the accuracy of related 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 transmission device and the wire rope, the sound transmission path deforms from an ideal straight line to a curve, thus affecting the accuracy of acoustic performance measurement. Therefore, it is very important to calibrate the transmission path of anechoic chamber. The finite element simulation focuses on the influence of rope length, tightness, and inclination angle on the sound transmission path. The accuracy of the simulation model is verified by corresponding experiments, and the specific influence of different parameters on the sound transmission path is studied by horizontal comparison of parameters. The research on the deviation of the parameters on the acoustic transmission path provides a train of thought for the error calibration of the sound transmission path from multiple angles, which is helpful to improve the accuracy of measuring devices in the anechoic chamber and promotes the development of high-precision automatic calibration system in an anechoic chamber to a certain extent.
2024, Vol. 45 
