| 罗怡珊,汪源源,徐峰,俞承芳,他得安,王威琪.时域有限差分法研究骨传导超声特性[J].声学技术,2007,(5):877~881 |
| 时域有限差分法研究骨传导超声特性 |
| Research on bone-conducted ultrasound with finite difference time domain method |
| 投稿时间：2007-01-26 修订日期：2007-03-20 |
| DOI： |
| 中文关键词: 骨传导 超声 助听 时域有限差分法 |
| 英文关键词: bone-conduction ultrasound hearing aid FDTD |
| 基金项目:国家自然科学基金(30570488);上海市科委定向课题(0-54119612) |
| 作者 | 单位 | E-mail | | 罗怡珊 | 复旦大学电子工程系, 上海, 200433 | | | 汪源源 | 复旦大学电子工程系, 上海, 200433 | yywang@fudan.edu.cn | | 徐峰 | 复旦大学电子工程系, 上海, 200433 | | | 俞承芳 | 复旦大学电子工程系, 上海, 200433 | | | 他得安 | 复旦大学电子工程系, 上海, 200433 | | | 王威琪 | 复旦大学电子工程系, 上海, 200433 | |
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| 中文摘要: |
| 自发现通过骨传导人可以感知超声以来,骨传导超声技术已被应用于助听中。为进一步了解骨传导超声特性,采用时域有限差分(FDTD)法,在单耳激励和双耳激励的情况下,计算超声经骨传导在头内形成的声场。仿真实验结果表明:双耳超声激励没有普通双耳听觉的定位能力,而单耳超声激励可同时激励双耳耳蜗。因此,单耳骨传导超声助听的效果可能比双耳骨传导超声助听的效果好。 |
| 英文摘要: |
| The bone-conducted ultrasound has been used in hearing aid since finding out that people are able to perceive it. In order to further understand the characteristics of the bone-conducted ultrasound,Finite Difference Time Domain (FDTD) method is used to calculate the sound field in human head model for both unilateral and bilateral stimuli. Simulation results show that bilateral bone-conducted ultrasonic stimulus doesn′t have the ability of source location as common binaural hearing,while the unilateral stimulus can stimulate both cochleae at the same time. The study indicates that the unilateral bone-conducted ultrasonic hearing aid performs better than the bilateral one. |
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