压电型人工耳蜗的实验研究

Experimental Research of Piezoelectric Cochlear

系统研究了不同特性的压电陶瓷植入耳蜗及其植入位置对听阈变化的影响,实验结果表明,植入材料的机电耦合系数和电容越大,听阈下降越明显;陶瓷片置于鼓介中内侧贴于螺旋神经表面成功率最高.充分证实了压电陶瓷片植入耳蜗可模拟毛细胞进行声电转换,刺激听神经引起听觉,提高聋耳的听力这一新构想是成功的.

The effects of properties of piezoelectric ceramics and implantation position on hearing threshold change were studied. The experimental results show that the larger electromechancial coupling coefficient and electric capacity of implantation piezo-ceramics are, the more obviously hearing threshold descends. And the successful probability is the highest while the ceramic sheet is stocked on the inside surface of cochlear nerve of spiral limbus in the scala tympani. The results fully confirm the new idea is successful that piezoelectric ceramics cochlear implant can simulate hair cell to do acoustic-electric transition, simulate auditory nerve to evoke the sense of hearing and improve the deaf ear's hearing.