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首页> 外文期刊>Japanese journal of applied physics >Reconstruction of Three-Dimensional Sound Field from Two-Dimensional Sound Field Using Optical Computerized Tomography and Near-Field Acoustical Holography
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Reconstruction of Three-Dimensional Sound Field from Two-Dimensional Sound Field Using Optical Computerized Tomography and Near-Field Acoustical Holography

机译：使用光学计算机断层扫描和近场声全息术从二维声场重构三维声场

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摘要

We propose a method for reconstruction of a three-dimensional sound field using optical computerized tomography (O-CT) and near-field acoustical holography (NAH). The center of a transducer is the origin, and a sound wave is radiated along the z-axis. An ultrasonic wave affects the phase of light passing through the sound field, and the phase change is determined using a Michelson interferometer. Projections of the underwater sound field were obtained by mechanical scanning, and the sound field was reconstructed from 18 of these projections by O-CT. To determine sound velocity for reconstruction of the three-dimensional sound field, two-dimensional sound fields at z = 40 and 41 mm were reconstructed using O-CT in a region of 28 × 28 mm~2. The sound velocity was determined to be 1508m/s using inverse analysis of NAH. Using NAH and the determined sound velocity, the three-dimensional sound field of 28 × 28 × 5 mm~3 was reconstructed from the two-dimensional sound field at z = 40 mm. The sound field reconstructed using NAH was in good agreement with the sound field reconstructed using O-CT.
机译：我们提出了一种使用光学计算机断层扫描（O-CT）和近场声全息（NAH）重建三维声场的方法。换能器的中心是原点，并且声波沿z轴辐射。超声波会影响通过声场的光的相位，并使用迈克尔逊干涉仪确定相位变化。通过机械扫描获得水下声场的投影，并通过O-CT从这些投影中的18个重建声场。为了确定用于重建三维声场的声速，使用O-CT在28×28 mm〜2的区域内重构了z = 40和41 mm处的二维声场。使用NAH的逆分析将声速确定为1508m / s。使用NAH和确定的声速，从z = 40 mm的二维声场重建28×28×5 mm〜3的三维声场。使用NAH重建的声场与使用O-CT重建的声场非常吻合。

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  • 来源
    《Japanese journal of applied physics》 |2009年第7issue2期|07GC03.1-07GC03.5|共5页
  • 作者

    Takeshi Ohbuchi; Koichi Mizutani; Naoto Wakatsuki; Kojiro Nishimiya; Hiroyuki Masuyama;

  • 作者单位

    Graduate School of Systems and Information Engineering, University of Tsukuba, Tsukuba, Ibaraki 305-8573, Japan;

    Graduate School of Systems and Information Engineering, University of Tsukuba, Tsukuba, Ibaraki 305-8573, Japan;

    Graduate School of Systems and Information Engineering, University of Tsukuba, Tsukuba, Ibaraki 305-8573, Japan;

    Graduate School of Systems and Information Engineering, University of Tsukuba, Tsukuba, Ibaraki 305-8573, Japan;

    Electronic Mechanical Engineering Department, Toba National College of Maritime Technology, Toba, Mie 517-8501, Japan;

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