Reconstruction of Three-Dimensional Sound Field from Two-Dimensional Sound Field Using Optical Computerized Tomography and Near-Field Acoustical Holography
Reconstruction of Three-Dimensional Sound Field from Two-Dimensional Sound Field Using Optical Computerized Tomography and Near-Field Acoustical Holography
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DOI：
10.1143/jjap.48.07gc03
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发表时间：
2009-07-01
影响因子：
1.5
通讯作者：
Masuyama, Hiroyuki
中科院分区：
文献类型：
--
作者：
Ohbuchi, Takeshi;Mizutani, Koichi;Masuyama, Hiroyuki
提出了一种利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轴沿着辐射。超声波影响通过声场的光的相位，并且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。为了确定三维声场重建的声速，使用O-CT在28 x 28 mm的区域中重建z = 40和41 mm的二维声场（2）。利用NAH的逆分析确定声速为1508 m/s。使用NAH和确定的声速，从z = 40 mm处的二维声场重建28 x 28 x 5 mm（3）的三维声场。使用NAH重建的声场与使用O-CT重建的声场一致。(C)2009日本应用物理学会
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 x 28 mm(2). The sound velocity was determined to be 1508 m/s using inverse analysis of NAH. Using NAH and the determined sound velocity, the three-dimensional sound field of 28 x 28 x 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. (C) 2009 The Japan Society of Applied Physics