A frequent first reaction to the suggestion that sound can be used to form images is one of surprise, for the sensing of sonic images is outside the realm of our normal experience. Since the wavepropagation characteristics of sound are similar to those of light, however, such a possibility exists, providing that a sonic image can somehow be converted into a visual experience. A number of means of doing that have been developed; their advantages and disadvantages are discussed below. The ability to “see” with sound would allow us to “look” into opaque objects or “see” through murky water.
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D. Gabor, Nobel lecture, Stockholm (1972).
2.
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B. P. Hildebrand, B. B. Brenden, An Introduction to Acoustical Holography, Plenum, New York (1972).
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Acoustical Holography, vols. 1–4, Plenum, New York (1969–1973).
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M. Falus, H. J. Caulfield, P. Greguss, 2nd World Congress in Ultrasonics in Medicine, Rotterdam, 1973 (in press).
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D. Gabor, US Patent No. 3 745 814 (1973).
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P. Greguss, US Patent Pending; French Patent No. 2 177 410 (1973).
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J. B. Farr, US Patent 3 729 704 (1973).
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© 1974 American Institute of Physics.
1974
American Institute of Physics
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