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| A Wide-band Measurement Method for Transmission Coefficient Based on Pulse Compression Technique |
| YU Sheng-qi YANG Shi-e HUANG Yi-wang WU Qiong |
| Science and Technology on Underwater Acoustic Laboratory, Harbin Engineering University, Harbin 150001, China |
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Abstract Transmission coefficient is one of the most significant parameters of underwater acoustic materials. In order to measure the transmission coefficient in tank, a method based on pulse compression technique is proposed, where the directive wave are extracted from the compressed signal. The method can overcome unavoidable multi-path disturbance in experiment, and easily obtain the transmission coefficient for all the frequencies in the measured frequency band simultaneously. That is, wide-band measurement is realized. This method is verified through comparison between the results of narrow and wide-band measurements to a glass box, which are conducted in the frequency range of 20kHz-60kHz in a tank.
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Received: 06 December 2011
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2013, Vol. 32 
