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- W2028106445 abstract "In recent years, linear FM wave pulses and phase modulated wave pulses have been used to improve resolution and signal to noise ratios. In this paper, we report on transient sound fields generated by a sound source which is driven by linear FM wave pulses and phase modulated wave pulses. Time varying sound pressure at a distance R from the center of a sound source is calculated, varying the angle θ from the center axis of the sound source. A new display method to represent the calculated transient sound fields is proposed. In the method, the angle θ is taken as the abscissa, the time t is taken as the ordinate, and amplitude of sound pressure is represented in color. The effectiveness of this display method is demonstrated by examining calculated results of sound fields produced by sine wave pulses and the representation of these results using the proposed method. The method allows us to observe simultaneously a time varying waveform of sound pressure at each observation point and directivity at each instant of time. Transient sound fields produced by linear FM wave pulses and phase modulated wave pulses are calculated and represented by the display method. Characteristics of these fields are discussed using the calculated and represented results." @default.
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- W2028106445 date "1997-05-01" @default.
- W2028106445 modified "2023-10-16" @default.
- W2028106445 title "Transient Fields of a Sound Source Driven by Various Wave Shape Pulses" @default.
- W2028106445 doi "https://doi.org/10.1143/jjap.36.3207" @default.
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