Statistically optimized near field acoustic holography using an array of pressure-velocity probes
Statistically optimized near field acoustic holography using an array of pressure-velocity probes
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DOI：
10.1121/1.2434245
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发表时间：
2007-03-01
影响因子：
2.4
通讯作者：
Jaud, Virginie
中科院分区：
文献类型：
--
作者：
Jacobsen, Finn;Jaud, Virginie
统计优化的近场声全息（SONAH）不同于传统的近场声全息（NAH），因为它避免了空间傅里叶变换;处理直接在空间域中完成。与NAH相比，SONAH的主要优点是可以放宽通常对测量孔径的要求，使其远远超出光源。NAH和SONAH都是基于这样的假设，即所有源都在测量平面的一侧，而另一面是免费的。提出了一种基于双层压力传声器阵列测量的SONAH方法的扩展。双层技术使得有可能区分阵列两侧的源，从而抑制来自“错误”侧的外来噪声的影响。最近还证明，与基于压力麦克风阵列的NAH相比，基于声粒子速度换能器阵列（单层）的NAH具有显著的优势。这项调查结合了这两个想法，并通过计算机模拟以及实验研究SONAH的压力-速度强度探头阵列的基础上。(c)2007年，美国声学学会。
Statistically optimized near field acoustic,holography (SONAH) differs from conventional near field acoustic holography (NAH) by avoiding spatial Fourier transforms; the processing is done directly in the spatial domain. The main advantage of SONAH compared with NAH is that the usual requirement of a measurement aperture that extends well beyond the source can be relaxed. Both NAH and SONAH are based on the assumption that all sources are on one side of the measurement plane whereas the. other side is source free. An extension of the SONAH procedure based on measurement with a double layer array of pressure microphones has been suggested. The double layer technique makes it possible to distinguish between sources on the two sides of the array and thus suppress the influence of extraneous noise coming from the "wrong" side. It has also recently been demonstrated that there are significant advantages in NAH based on an array of acoustic particle velocity transducers (in a single layer) compared with NAH based on an array of pressure microphones. This investigation combines the two ideas and examines SONAH based on an array of pressure-velocity intensity probes through computer simulations as well as experimentally. (c) 2007 Acoustical Society of America.