Journal
JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA
Volume 140, Issue 1, Pages 114-120Publisher
ACOUSTICAL SOC AMER AMER INST PHYSICS
DOI: 10.1121/1.4954757
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- U.S. Department of Energy, Office of Energy Efficiency and Renewable Energy, Office of Building Technology [DE-AC02-06CH11357]
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This paper evaluates the performance of various regularization parameter choice methods applied to different approaches of nearfield acoustic holography when a very nearfield measurement is not possible. For a fixed grid resolution, the larger the hologram distance, the larger the error in the naive nearfield acoustic holography reconstructions. These errors can be smoothed out by using an appropriate order of regularization. This study shows that by using a fixed/manual choice of regularization parameter, instead of automated parameter choice methods, reasonably accurate reconstructions can be obtained even when the hologram distance is 16 times larger than the grid resolution. (C) 2016 Acoustical Society of America.
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