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- W1999718911 abstract "With holography, an entire 3D wave field can be reconstructed from data obtained on a single 2D surface. Such high information content has made holography a powerful research tool, and useful extensions from its original optical domain to other wave fields, such as sound, have naturally been pursued. However, it has usually been assumed that the resolution of a holographic reconstruction is limited by the wavelength of the radiation; this limitation severely diminishes the usefulness of holography for sound fields when the wavelengths are many times larger than the objects to be imaged. We have developed a new technique called nearfield holography, which eliminates the wavelength resolution limit and in addition permits a determination of: (1) the complete sound pressure and particle velocity fields produced by the source; (2) the mode of vibration of the surfaces of the source; (3) the vector intensity field (showing flow of acoustic energy) around the source; (4) the farfield directivity pattern; (5) the total power radiated into a half-space. A particularly interesting application of nearfield holography occurs in the study of sound radiation from musical instruments. [Work supported by ONR.]" @default.
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- W1999718911 date "1982-11-01" @default.
- W1999718911 modified "2023-09-24" @default.
- W1999718911 title "Sound radiation measurement with nearfield holography" @default.
- W1999718911 doi "https://doi.org/10.1121/1.2019988" @default.
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