| 基于小波分析的Bessel声场预处理 |
| |
| 引用本文： | 李琴,谭冠政.基于小波分析的Bessel声场预处理[J].中国科学院研究生院学报,2012,29(4):524-528. |
| |
| 作者姓名： | 李琴 谭冠政 |
| |
| 作者单位： | 中南大学信息科学与工程学院,长沙,410083 |
| |
| 摘 要： | 采用Fourier-Bessel方法对环型换能器的声场进行数值计算,并对仿真声场进行了深入讨论.通过对换能器轴向声压分布的分析,针对声近场明显的扰动,提出一种新的方法对声场进行预处理,即利用小波多分辨率分析降噪,去除近场杂频率成分,提高声压幅度.研究结果表明,小波分析技术能提高Bessel声场的基波成像质量,对于小波变换在Bessel超声成像中的应用提供了很好的依据.
|
| 关 键 词： | Fourier-Bessel 小波分析 自适应降噪 |
Bessel field pre-treatment based on wavelet analysis |
| |
| LI Qin
,
TAN Guan-Zheng.Bessel field pre-treatment based on wavelet analysis[J].Journal of the Graduate School of the Chinese Academy of Sciences,2012,29(4):524-528. |
| |
| Authors: | LI Qin TAN Guan-Zheng |
| |
| Institution: | (School of Information Science & Engineering,Central South University,Changsha 410083,China) |
| |
| Abstract: | The simulated sound field of an annular ultrasound transducer is given based on Fourier-Bessel series method.After analyzing the axial acoustic pressure,especially the near-field disturbance,wavelet multi-resolution analysis of the noise reduction is carried out for removing the near-field complex frequency components and increasing the sound pressure amplitude.The results show that the wavelet analysis technique can be used for improving the fundamental ultrasound imaging quality of Bessel field. |
| |
| Keywords: | Foursier-Bessel wavelet analysis adaptive denoising |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
|
