Target Detectability Using Coded Acoustic Signal in Indoor Environments
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概要
- 論文の詳細を見る
An acoustic method in air has the potential to allow for the fast and accurate characterization of objects in air. Nevertheless, it is difficult to identify acoustic signals clearly because of environmental noises and the scattering of signals on the object surface. Therefore, it is required to establish a sensing system, which enables measurements in air. In this paper, we present the object detection using an $M$-sequence signal in an indoor environment. Using the $M$-sequence signal enabled the improvement in signal-to-noise (SN) ratio and the stable measurement of reflected waves that cannot be detected using a conventional impulse. The noise and reverberation components are included in the received signals and reflected waves from the target. We confirmed that in the case of a high-order $M$-sequence signal, target detectability is limited by reverberation. In addition, we eliminated the reverberation component from the received signals using the signals without the target in the reverberation limited case and determined the reflection characteristics of the target.
- Published by the Japan Society of Applied Physics through the Institute of Pure and Applied Physicsの論文
- 2008-05-25
著者
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Yamaguchi Tadashi
Research Center For Frontier Medical Engineering Chiba University
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Matsuo Hiroshi
Graduate School Of Material Science And Engineering University Of Fukui
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Hachiya Hiroyuki
Graduate School Of Science And Engineering Tokyo Institute Of Technology
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Yamaguchi Tadashi
Research Center for Frontier Medical Engineering, Chiba University, 1-33 Yayoi-cho, Inage-ku, Chiba 263-8522, Japan
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MATSUO Hiroshi
Graduate School of Fiber Amenity Engineering, University of Fukui
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Hachiya Hiroyuki
Graduate School of Science and Engineering, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo 152-8550, Japan
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Matsuo Hiroshi
Graduate School of Advanced and Integration Science, Chiba University, 1-33 Yayoi-cho, Inage-ku, Chiba 263-8522, Japan
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