Conference proceeding
Propagation Through Inhomogeneous Media Using the Angular Spectrum Method
IEEE 1987 Ultrasonics Symposium, pp 943-946
1987
Abstract
This paper presents a technique for analyzing the acoustic fields generated by ultrasonic transmitters when radiating into layered, inhomogeneous media. The technique is based on the angular spectrum method of wavefield analysis, which is used to forward- or backpropagate acoustic fields between two parallel planar surfaces. Wave propagation is modelled as shift invariant filtering in the spatial frequency domain, with each spatial frequency component multiplied by the appropriate phase propagation factor. By modifying the phase propagation factors, the effects of attenuation, dispersion, refraction, and phase distortion may be modelled. Simulation results demonstrate several features of this approach, and experimental results show the ability of the technique to determine the pressure and velocity fields from different transducers. Wideband propagation is considered as an extension to the basic monochromatic model.
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10 citations in Scopus
Details
- Title
- Propagation Through Inhomogeneous Media Using the Angular Spectrum Method
- Creators
- M.E Schafer - Interspec, Inc (United States, Conshohocken)P.A Lewin - Drexel UniversityJ.M Reid - Drexel University
- Publication Details
- IEEE 1987 Ultrasonics Symposium, pp 943-946
- Conference
- IEEE 1987 Ultrasonics Symposium (Denver, Colorado, United States, 14 Oct 1987–16 Oct 1987)
- Publisher
- IEEE
- Number of pages
- 4
- Resource Type
- Conference proceeding
- Language
- English
- Academic Unit
- School of Biomedical Engineering, Science, and Health Systems
- Scopus ID
- 2-s2.0-0023540071
- Other Identifier
- 991019186656604721