用于数字助听器的21波段1/3倍频滤波器组

International Conference on Pattern Recognition, Informatics and Medical Engineering (PRIME-2012) Pub Date : 2012-03-21 DOI:10.1109/ICPRIME.2012.6208371

D. Tharini, J. P. Kumar

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引用次数: 10

摘要

ANSI S1.11 1/3倍频程滤波器组在声学应用中很受欢迎，因为它很好地匹配了人耳的频率特性。然而，较高的计算复杂度限制了它的使用。本文研究了一种功耗低、能准确覆盖人类语音频率的数字助听器。为了降低滤波器的阶数，提出了一种具有系统系数设计流程的复杂有效多速率FIR滤波器组算法。现有方法采用18条条带。它的频率范围从140Hz到8979Hz。它没有完全覆盖人类的声音频率。因为一个典型成年男性的发声频率从80Hz到145Hz开始。这里有21个波段使用有限脉冲响应(FIR)滤波器。该滤波器已在Synopsys中进行了仿真。该方法的功耗比其他方法低30% ~ 79%，且覆盖了人类的语音频率。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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21 Band 1/3-Octave Filter bank for digital hearing aids

ANSI S1.11 1/3 Octave Filter bank is popular in acoustic applications due to well matching the frequency characteristics of human ears. However high computation complexity limits its usage. This paper deals with the digital hearing aids which consumes less power and cover the human voiced speech frequency correctly. The technique called the complexity-effective multirate FIR filter bank algorithm with a systematic coefficient design flow is proposed to reduce the order of the filter. In existing method 18 bands were used. It cover the frequency range from 140Hz to 8979Hz. It didn't cover the human voice frequency fully. Because the voiced speech of a typical adult male starts from 80Hz to 145Hz. Here 21 bands are used with Finite Impulse Response (FIR) filters. This filter has been simulated in Synopsys. The proposed method consumes less power which is 30%-79% less of other methods and cover the human voiced speech frequency.

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International Conference on Pattern Recognition, Informatics and Medical Engineering (PRIME-2012)

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