Scanning camera for continuous-wave acoustic holography
Hillary W. Gao, Kimberly I. Mishra, Annemarie Winters, Sidney Wolin, and David G. Grier
TL;DR
This paper introduces a scanning camera system for continuous-wave acoustic holography that accurately measures pressure fields to enable precise volumetric sound field reconstructions and dynamic analysis of objects.
Contribution
It presents a novel measurement system for acoustic holography and demonstrates volumetric reconstruction using the Rayleigh-Sommerfeld integral, including dynamic property analysis.
Findings
Successful volumetric reconstructions of simple objects
Effective analysis of dynamic properties of insonated objects
Complete specification of acoustic holograms in the recording plane
Abstract
We present a system for measuring the amplitude and phase profiles of the pressure field of a harmonic acoustic wave with the goal of reconstructing the volumetric sound field. Unlike optical holograms that cannot be reconstructed exactly because of the inverse problem, acoustic holograms are completely specified in the recording plane. We demonstrate volumetric reconstructions of simple arrangements of objects using the Rayleigh-Sommerfeld diffraction integral, and introduce a technique to analyze the dynamic properties of insonated objects.
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Taxonomy
TopicsDigital Holography and Microscopy · Aerodynamics and Acoustics in Jet Flows · Underwater Acoustics Research