近场声全息理论与应用的研究现状与展望

REVIEW AND OUTLOOK OF RESEARCHES ON NEAR FIELD ACOUSTICAL HOLOGRAPHY THEORIES WITH APPLICATION

回顾近场声全息(NAH,nearfieldacousticalholography)理论与应用的发展历史及国内外研究现状。对NAH技术进行分类,并对各类NAH技术的重建算法及适用范围进行评述。重点介绍近十几年来NAH的发展:正交共形结构NAH技术中关于测量孔径有限性对重建精度影响的研究,特别是关于数据外推技术的发展;全息面数据采集方法研究,包括参考源互谱测量法及基于声强测量的宽带声全息重建技术(broadbandacousticalholographyfromintensitymeasurement,BAHIM)法;任意形结构NAH技术中声场重建病态性研究的发展,特别是正则化理论的应用;NAH在工程中的应用研究,包括移动声源、封闭空间声场等场合的应用等。另外,还介绍一些其他的声场重建技术,包括Helmholtz积分方程最小均方误差法(HELS)、边界点方法等。最后,讨论NAH研究有待解决的问题,并探讨NAH研究的发展趋势。

The researches on near field acoustical holography (NAH) are reviewed. NAH techniques are classified, and their reconstruction algorithm and scopes of application are also introduced. The main developments of NAH in near decades are emphatically discussed such as about solving the implement to reconstruction precision of finiteness of the measurement aperture in orthonormal and conformal NAH technique, especially, the application of the data extrapolation method in NAH, about the sampling method of hologram data including spatial transformation of sound field with multiple reference and BAHIM (broadband acoustical holography from intensity measurement), about ill-posed inverse problem of BEM(boundary element method)-based NAH, especially, the application of regularization method in NAH, the application of NAH in engineering including moving source and sound field of enclosed spaces, etc. In addition, other techniques about sound field reconstruction are introduced including Helmholtz equation least squares and boundary point method, etc. Finally, the current difficulties in NAH are discussed, and a preview of the future development is provided.