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1 August 1972 Bragg-Diffraction Imaging And It's Application For Non Destructive Testing
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Proceedings Volume 0029, Imaging Techniques for Testing and Inspection; (1972) https://doi.org/10.1117/12.978148
Event: Imaging Techniques for Testing and Inspection, 1972, Los Angeles, United States
Abstract
Though nature abounds with sonic detecting systems, men have been slow to recognize the potential use of acoustic energy as a means of visualization, that is, for "seeing" with sound. In the 18th Century a rather inventive Italian scientist named Spallanzani carried out a study of the remarkable ability possessed by bats for avoiding obstacles in the dark. (Ref. 1) He and his co-workers finally concluded that bats must have some unknown "sixth sense". One hundred years later the Frenchman Langevin proposed a sonic-echo system as a possible means of locating objects submerged in the sea, German U-boats in particular. Shortly after, Hartridge recognized and suggested a possible similarity between Langevin's system and the system used by bats (Ref. 2,3).
© (1972) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
J. Landry and G. Wade "Bragg-Diffraction Imaging And It's Application For Non Destructive Testing", Proc. SPIE 0029, Imaging Techniques for Testing and Inspection, (1 August 1972); https://doi.org/10.1117/12.978148
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