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The Use of Several Signal Processing Methods in the Field of Vector Acoustic Signal Processing

Author: SunShaoWu
Tutor: ZhangLin
School: Harbin Engineering University
Course: Underwater Acoustics
Keywords: Vector Hydrophone Anisotropic noise field Correlation function Wavelet Transform STFT
CLC: U666.7
Type: Master's thesis
Year: 2003
Downloads: 380
Quote: 3
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Abstract


Vector hydrophone detection technology is one of the underwater acoustic technology emerging in recent years , it has broad application prospects in weak signal detection , low noise objective measurement field , which is referred to as \Relative to the traditional sound pressure hydrophone vector hydrophone detection technology to be able to detect the acoustic vector signal contains spatial orientation information . Based the vector hydrophone sound use of space energy flow detector sound energy flow offset technology relative to the sound pressure detector available time- bandwidth product is proportional to the space-time gain . This is the vector hydrophone detection technology, part of the allure . In the ideal case , when the noise field is isotropic noise field , via the acoustic energy flow long integration , a single vector hydrophone infinitely large gain can be obtained . But in practice, the anisotropic component of the noise field , the noise sound energy flow can only be limited offset. Anisotropic noise field , for example , the sound pressure in the acoustic vector signal , vibration speed to investigate the application of adaptive filtering , wavelet transform , the short time Fourier transform smooth sound of water and the application of non- stationary signals effect . The results show that : the adaptive filtering for anisotropic noise field line spectrum detection with good results ; wavelet transform and short time Fourier transform of anisotropic noise field of ship noise modulation signal detection with good results .

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CLC: > Transportation > Waterway transport > Marine Engineering > Navigation equipment, acoustic equipment > Acoustic equipment
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