Single layer planar near-field acoustic holography for compact sources and a parallel reflector

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• 作者：Elias Zea^a ; ^{zea@kth.se" class="auth_mail" title="E-mail the corresponding author} ; ; Ines Lopez Arteaga^a ; ^b ; ^{inesla@kth.se" class="auth_mail" title="E-mail the corresponding author}
• 关键词：NAH ; Feld separation techniques ; Reflective environments
• 刊名：Journal of Sound and Vibration
• 出版年：2016
• 出版时间：13 October 2016
• 年：2016
• 卷：380
• 期：Complete
• 页码：129-145
• 全文大小：3139 K

文摘

We consider the problem of planar near-field acoustic holography (PNAH) and introduce a new reconstruction method that can be used to process single layer pressure measurements performed in the presence of a reflective surface that is parallel to the measurement plane. The method is specially tailored for compact sources, or for problems in which the scattered field due to the source can be neglected. The approach consists in formulating a seismic model (WRW model) in wavenumber–space and employ it for sound source reconstructions. The proposed method is validated with numerical and experimental data, and, although the most accurate results are obtained when an estimate of the surface impedance is known beforehand, we show that it can substantially improve the reconstruction performance with respect to that of free-field PNAH.