Book chapter
A new technique for characterizing ultrasonic transducers in inhomogeneous media
Proceedings of the 15th International Symposium on Acoustical Imaging, (3), pp 135-145
30 Jun 1987
Abstract
This work describes several extensions to the angular spectrum method of acoustic field analysis in order to account for wave propagation in inhomogeneous media. The method provides three dimensional prediction of both near- and farfield complex pressure distributions for differently shaped ultrasonic radiators, both planar and focussed. In addition, the method also models a layered inhomogeneous medium, concurrently accounting for several media properties. The approach is based on a systematic extension of the angular spectrum method; this involves modifying the phase factor to account for refraction, dispersion, attenuation and the effects of weak inhomogeneities. A computer simulation has been developed, and results for various transducer geometries and media properties are discussed. Specifically, the field patterns from focused and phase steered apertures are modelled, and propagation in media which have refractive and phase distorting properties is examined.
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Details
- Title
- A new technique for characterizing ultrasonic transducers in inhomogeneous media
- Creators
- M.E. Schafer - Drexel UniversityP.A. Lewin - Drexel UniversityJ.M. Reid - Drexel University
- Publication Details
- Proceedings of the 15th International Symposium on Acoustical Imaging, (3), pp 135-145
- Conference
- 15th International Symposium on Acoustical Imaging, 15th (Halifax, Nova Scotia, Canada, 14 Jul 1986–16 Jul 1986)
- Series
- Acoustical Imaging; 15
- Publisher
- Springer
- Number of pages
- 11
- Resource Type
- Book chapter
- Language
- English
- Academic Unit
- School of Biomedical Engineering, Science, and Health Systems
- Scopus ID
- 2-s2.0-0023575214
- Other Identifier
- 991019186541704721