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Laser Doppler vibrometer for real-time speech-signal acquirement

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【Author】 Jianhua Shang,Yan He,Dan Liu,Huaguo Zang,and Weibiao Chen Shanghai Key Laboratory of All Solid-State Laser and Applied Techniques,Shanghai Institute of Optics and Fine Mechanics,Chinese Academy of Sciences,Shanghai 201800,China

【机构】 Shanghai Key Laboratory of All Solid-State Laser and Applied Techniques,Shanghai Institute of Optics and Fine Mechanics,Chinese Academy of Sciences；

【摘要】 Laser Doppler vibrometer (LDV) has a potential application prospect in remote sensing.Based on the correlation theories of heterodyne detection,a LDV system with a configuration of all fiber and heterodyne techniques is developed to detect the sound signal through the vibration of glass.Experimental results show that the LDV system has an ability to acquire the real-time speech signal 25 m away through glass.While,the system signal-to-noise ratio (SNR) value decreases with the increase of the glass thickness and the detection distance.更多还原

【Abstract】 Laser Doppler vibrometer (LDV) has a potential application prospect in remote sensing.Based on the correlation theories of heterodyne detection,a LDV system with a configuration of all fiber and heterodyne techniques is developed to detect the sound signal through the vibration of glass.Experimental results show that the LDV system has an ability to acquire the real-time speech signal 25 m away through glass.While,the system signal-to-noise ratio (SNR) value decreases with the increase of the glass thickness and the detection distance.更多还原

【关键词】 acquire； prospect； transmitted； quadrature； transmitter； dynamically； oscillator； transducer； broadcasting； filtered；

【文献出处】 Chinese Optics Letters ,中国光学快报(英文版) , 编辑部邮箱 ,2009年08期

【分类号】TN912.3;TH744.5
【被引频次】27
【下载频次】188

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