Abstract：In order to develop a pressured, low-frequency and wide-band acoustic barrier which can shield the noise and improve the spatial gain of acoustic array in underwater sonar system, the acoustic tube sample was designed. According to the sound propagation theory in layered medium, the sound pressure reflection coefficient and transmission coefficient under the backing of air and water were calculated by using the transfer matrix method of multilayer uniform structure, and there were obvious different acoustic properties. A measured sample with a diameter of 206mm was made. The acoustic performance of the acoustic baffle sample in the frequency range of 100Hz～4kHz and the hydrostatic pressure range from normal pressure to 2MPa was tested by using the standing wave tube and traveling wave tube measurement system in Hangzhou Research Institute of Applied Acoustics. The measured results are basically agreed with the theoretical calculation value. The acoustic baffle sample has certain low-frequency and wide-band echo characteristics under hydrostatic pressure.
李水,罗马奇,易燕. 高静水压下障板样品声特性的计算与测量[J]. 计量学报, 2022, 43(5): 636-642.
LI Shui,LUO Ma-qi,YI Yan. Calculation and Measurement for Acoustic Characteristics of Baffle Sample under High Hydrostatic Pressure. Acta Metrologica Sinica, 2022, 43(5): 636-642.
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2022, Vol. 43 
