| 刘鹏华,戴明远.医用线列阵声场计算方法[J].声学技术,2004,(3):163~167 |
| 医用线列阵声场计算方法 |
| Methods for calculating acoustic fields of medical linear array |
| 投稿时间：2003-12-30 修订日期：2004-03-30 |
| DOI： |
| 中文关键词: 指向性函数 线列阵 变迹处理 声场 |
| 英文关键词: directivity function linear array apodization processing sound field |
| 基金项目: |
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| 中文摘要: |
| 用指向性函数分别描述了医用线列阵单频波和宽带波声场。讨论了应用电子聚焦处理、幅度加权变迹处理和孔径变迹处理的方法来改善波束特性;论述了在实际中应用较多的宽带波声场的计算。通过分析表明,宽带波持续时间愈长,宽带波声场就愈接近于单频波声场。 |
| 英文摘要: |
| The directivity function is used to describe the sound field of single-frequency and broad-band waves produced by a medical linear array. A method is developed with electronic focusing, amplitude weighting and aperture apodization to improve the beam patterns. In this paper, calculation of the sound field of broad-band waves, which are used more frequently in practice, is emphasized. The results show that the longer the broad-band wave lasts, the more the sound field is similar to that of the single-frequency wave. |
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