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。
The bone-conducted ultrasound has been used in heming 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.
出处
《声学技术》
CSCD
北大核心
2007年第5期877-881,共5页
Technical Acoustics
基金
国家自然科学基金(30570488)
上海市科委定向课题(0-54119612)
