Volume 37, Number 5, October 2019
|1036 - 1043
|14 January 2020
The Reflection Coefficients Measurement Method for the Underwater Acoustic Materials Based on the Single Vector Hydrophone
Acoustic Science and Technology Laboratory, Harbin Engineering University, Harbin 150001, China
2 Key Laboratory of Marine Information Acquisition and Security(Harbin Engineering University), Ministry of Industry and Information Technology, Harbin 150001, China
3 College of Underwater Acoustic Engineering, Harbin Engineering University, Harbin 150001, China
In order to obtain the normal acoustic reflection coefficients of underwater acoustic materials in the free field with the wideband pulse signal, a new measuring method with a single vector hydrophone and the post-processing inverse filtering is put forward. Numerical simulations had been conducted to comparatively analyze the measurement performances of the measuring method. The simulation results show that the present method should be established on the high ratio of signal to the noise and it is not sensitive to the system error. The experiment result shows that the post-processing inverse filtering measuring method is more effective comparing with the method without the post-processing inverse filtering, especially the measurement consequence of the post-processing inverse filtering measurement method tends to the theoretical value when the frequency is higher than 2.5 kHz, because limitation of the transducer.
Key words: single vector hydrophone / post-processing inverse filtering / wide band pulse signal / acoustic reflection coefficients
关键字 : 矢量水听器 / 后置逆滤波 / 宽带脉冲 / 声反射系数
© 2019 Journal of Northwestern Polytechnical University. All rights reserved.
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