基于小波分频的压电式人工中耳信号处理研究  

Wavelet Frequency-division Based Signal Processing Design for a Piezoelectric Middle Ear Implant

作　　者：闵小峰[1] 刘后广[1] 田佳彬[1] 饶柱石[1] 

机构地区：[1]上海交通大学机械系统与振动国家重点实验室,上海200240

出　　处：《压电与声光》2011年第3期411-413,417,共4页Piezoelectrics & Acoustooptics

基　　金：国家自然科学基金资助项目(10772121);上海交通大学医工交叉研究基金资助项目(YG2007MS14)

摘　　要：基于一新型压电式人工中耳,提出利用小波分频方法对其信号进行处理,使该植入装置能模拟正常中耳的传递特性。首先,基于Bark频谱理论,利用小波分频技术将输入信号分为17个频带;再参考中耳传递特性,对每个频带的信号赋以相应的增益系数;最终,通过实验验证该方法的可行性。结果表明,该法可使压电叠堆的输出能较好地反应正常中耳的传递特性。To make an actuator of a new middle ear implant vibrate simulating middle ear transfer property,wavelet frequency division based signal processing method is proposed.Firstly,the wavelet transform separates the input signals into seventeen frequency bands based on Bark frequency scale.Then,each frequency band is multiplied with the wavelet coefficients by the gain corresponding to the transfer property of the human middle ear system.At last,the validity of this method is confirmed by an experiment.The results show this algorithm can make the output of the piezoelectric stack have a good performance of simulating the normal human middle ear transfer property.

关 键 词：人工中耳 小波分频 中耳传递特性 压电叠堆 

分 类 号：TN911.72[电子电信—通信与信息系统]