科研之友
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摘要
This paper presents a new acoustic nonlinear imaging method via a sound parametric array. The principle of this method is to generate a secondary wave with sum or difference frequency due to the nonlinear interaction of two primary waves. For some lossless and attenuating media, computer simulation for B/A tomography from calculated sound pressure of difference-frequency wave is studied using filtered convolution method. An experimental imaging system is set up land several B/A images for some liquids and biological tissues are obtained in this paper.
- 出版日期1999-8
- 单位南京大学
