| Acoustic Localization in Weakly Compressible Elastic Media Permeated with Air Bubbles |
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| 作者姓名： | 梁彬 朱哲民 程建春 |
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| 作者单位： | Laboratory of Modern Acoustics and Institute of Acoustics, Nanjing University, Nanjing 210093 |
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| 基金项目： | Supported by the Excellent Youth Science Foundation of China under Grant No 10125417, and the State Key Development Program of Basic Research under Grant No 51315. |
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| 摘 要： |
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| 关 键 词： | 声音局限化 弹性媒体 空气泡沫 纵向声波 |
| 收稿时间： | 2005-12-28 |
| 修稿时间： | 2005-12-28 |
Acoustic Localization in Weakly Compressible Elastic Media Permeated with Air Bubbles |
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| LIANG Bin, ZHU Zhe-Min, CHENG Jian-Chun.Acoustic Localization in Weakly Compressible Elastic Media Permeated with Air Bubbles[J].Chinese Physics Letters,2006,23(4):871-874. |
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| Authors: | LIANG Bin ZHU Zhe-Min CHENG Jian-Chun |
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| Abstract: | The propagation of longitudinal acoustic waves in weakly compressible elastic media permeated with air bubbles is investigated on the basis of the radial pulsation equation of a single bubble. The multiple scattering of waves in such media is rigorously described by using a self-consistent approach. Theoretical results show that there exists strong acoustic localization in a range of frequency slightly above the bubble resonance frequency, even for a very small volume fraction of bubbles. Further study reveals that the localization is in fact attributed to collection behaviour of bubbles, allowing for an efficient cancellation of propagating waves. This is essentially consistent with the known conclusions recently drawn for bubbly liquid by Kou et al. 2003 Appl. Phys. Left. 83 4247] |
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