Three methods of interpretation of outputs from sparsely sampled two-dimensional array of receiving ultrasonic transducers used in transmission experiments investigated. Methods are: description of sampled beam in terms of first few spatial moments of sampled distribution of energy; use of signal-dependent cutoff to limit extent of effective receiver aperture; and use of spatial interpolation to increase apparent density of sampling during computation. Methods reduce errors in computations of shapes of ultrasonic beams.
Sparsely Sampled Phase-Insensitive Ultrasonic Transducer Arrays
NASA Tech Briefs ; 16 , 11
1992-11-01
Sonstige
Keine Angabe
Englisch
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