Webundertaken under ONR Grant N00014-82-K-0610, 'Research with Nearfield Acoustic Holography'. Most of the technical details of the research may be found in the publication 'Nearfield Acoustic Holography (NAH). I. Theory of Generalized Holography and the Development of NAH: [J. Acoust. Soc. Am. 78, 1395 (1985)] and in Appendix I of this report, WebNearfield acoustic holography (NAH) is a methodology that enables the reconstruction of acoustic quantities in three-dimensional space from a two-dimensional measurement of …

Experimental study using nearfield acoustic holography of …

WebSep 25, 2024 · Hallmann, J. S. Bolton, S. M. Dumbacher, D. L. Brown, B. W. Libbey, and M. J. Lally, “ Acoustic source location in vehicle cabins and free-field with nearfield … WebJan 20, 2024 · Data measurement. The first step of 3DSNAH is the data measurement. In this step, the data is acquired by the 3D scanning measurement system depicted in Fig. … speedway naperville il

Nearfield acoustic holography-based methods for far field …

WebIt also presents a cornerstone of acoustic holography: it enables one to estimate all acoustic field quantities—sound pressure, particle velocity, sound intensity vector, the sound power radiated by a source, and its directivity pattern. It would seem fair to argue that an acoustic hologram is worth 5 10003/2 words. WebIn this thesis the techniques of Nearfield Acoustical Holography (NAH), a method for predicting acoustic radiation based upon measured acoustical field data, were extended to apply to acoustical radiation in interior spaces. A separation of variables approach to the problem was formulated, which was shown to provide a uniform approach to the … WebThe title is "Nearfield Acoustic Holography (NAH): II. Computer Algorithms." A preprint of this paper will be forwarded in the near future, pending editorial corrections. d) A … speedway nappanee gas prices