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Browsing by Subject "angular spectrum"

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    Item type:Article, Access status: Open Access ,
    Remote visualization of the velocity distribution on vibrating structures using the wave field analysis
    (Wydawnictwa AGH, 2007) Lewin, Peter A.; Berger, Andrew W.; Vecchio, Christopher J.; Schafer, Mark E.
    Knowledge of vibrating pattern characteristics is of interest in many applications, including minimization of noise generation in different media and design and optimization of piezoelectric transducers used in diagnostic ultrasound imaging. A field expansion technique developed for analyzing the acoustic fields and vibrating structures is presented. The technique is based on the angular spectrum method of wave-field analysis, and is applicable to both continuous (CW) and wideband pulsed waves, and allows the effects of acoustic parameters such as absorption, dispersion, refraction, and phase distortion to be accounted for. Examples of remotely reconstructed surface velocity distributions of complex acoustic radiators are presented and the potential applications of the technique developed in the analysis of fields radiated by sources with arbitrary geometries, including arrays are also pointed out.