基于嵌入式的助听器回波算法研究与实现

发布时间：2018-04-17 21:43

  本文选题：数字助听器 + 回声抵消　； 参考：《电子器件》2017年02期

【摘要】：回声会导致助听器产生啸叫,损坏助听器设备,破坏患者的残余听力。为此,本文在助听器回声抵消模型的基础上,针对输入信号的能量变化,研究了基于归一化最小均方NLMS(Normalized Least Mean Squares)的自适应助听器回声抵消算法。通过对比LMS和NLMS两种算法的MSE,ERLE等性能,研究发现NLMS算法在数字助听器模型中有更好的回声抵消性能。此外,将NLMS算法移植到嵌入式平台中,并通过实验对比算法的性能。因此,本研究对于助听器的回声抵消算法设计具有很强的实用价值。
[Abstract]:Echoes cause hearing aids to howl, damage hearing aids and damage patients' residual hearing.In this paper, based on the echo cancellation model of hearing aids, an adaptive echo cancellation algorithm based on normalized least mean square NLMS(Normalized Least Mean squares is proposed for the energy variation of input signals.By comparing the performance of LMS and NLMS, it is found that the NLMS algorithm has better echo cancellation performance in the digital hearing aid model.In addition, the NLMS algorithm is transplanted to the embedded platform, and the performance of the algorithm is compared through experiments.Therefore, this study has a strong practical value for the design of echo cancellation algorithm for hearing aids.
【作者单位】： 华侨大学工学院;东南大学水声信号处理教育部重点实验室;
【基金】：国家自然科学基金项目(61301219,61375028,61571106) 福建省自然科学基金项目(2015J01260) 泉州市科技计划项目(2014Z103,2014Z113)
【分类号】：R764.5;TN713
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本文编号：1765384