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- W2054514089 abstract "Ultrasonic transducers with nonaxisymmetric radiating surfaces are common in both industrial and medical applications. This presentation describes a numerical technique for calculating the second harmonic field produced in the field radiated by a transducer of arbitrary shape. The angular spectrum of the source is calculated with a two-dimensional Fourier transform, a weighted integral over the source spectrum is evaluated, and the inverse transform of the result yields the second harmonic pressure in any plane parallel to the source plane. Arbitrary absorption and dispersion are taken into account. The method is similar to that used by Alais and Hennion [Acustica 43, 1–11 (1979)] to evaluate the field of a parametric array. In the present theory, however, we do not make use of the parabolic approximation. Beam steering and focusing are introduced by appropriate phasing of the source function. Calculations of radiation patterns produced by rectangular and other sources are presented." @default.
- W2054514089 created "2016-06-24" @default.
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- W2054514089 date "1999-10-01" @default.
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- W2054514089 title "Calculation of second harmonic beam patterns for ultrasonic sources of arbitrary shape" @default.
- W2054514089 doi "https://doi.org/10.1121/1.427245" @default.
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