Open Access Open Access  Restricted Access Subscription or Fee Access

Design of ANSI S1.11 1/3-Octave Filter Bank for Low Power Digital Hearing Aids

D. Tharini, J. Prathishkumar

Abstract


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.

Keywords


Hearing Aids, FIR digital Filters, Non-Uniform Filter Bank, ANSI S1.11 1/3 Octave Filter Bank.

Full Text:

PDF

References


Yu-Ting Kuo, Tay-Jyi Lin, Yueh-Tai Li, and Chih-Wei Liu ―Design and Implementation of Low-Power ANSI S1.11 Filter Bank for Digital Hearing Aids‖ IEEE Transactions on Circuits and System vol. 57, No. 7, July 2010

E. Ozalevli, W. Huang, P. E. Hasler, and D. V. Anderson, ―A Reconfigurable Mixed-Signal VLSI Implementation of Distributed Arithmetic used for Finite-Impulse Response Filtering,‖ IEEE Tran. Circuits System, vol. 55, no. 2, pp. 510–521, Mar. 2008.

M. Aktan, A. Yurdakul, and G. Dundar, ―An Algorithm for Design of Low-Power Hardware-Efficient FIR filters,‖ IEEE Tran. Circuits System, vol. 55, no. 6, pp. 1536–1545, Jul. 2008.

R. Lehto, T. Saramaki, and O. Vainio, ―Synthesis of Narrow Band Linear-Phase Filters with a piecewise- polynomial Impulse Response,‖ IEEE Tran. Circuits Syst, vol. 54, no. 10, Oct. 2007.

T. Van den Bogaert, J. Wouters, T. J. Klasen, and M. Moone, ―Distortion of Interaural time cues by directional noise reduction system in modern digital hearing aids,‖ in Proc. IEEE Workshop on Appl.Of Signal Process. to Audio and Acoust., 2005.

M. A. Stone and B. C. J. Moore, ―Tolerable hearing-aid delays: III. effects on speech production and perception of across-frequency variation in delay,‖ Ear and Hearing, vol. 24, no. 2, 2003.

T. C. Chen and R. B. Sheen, ―A power-efficient wide-range phaselocked loop,‖ IEEE J. Solid-State Circuits, vol. 37, no. 1, pp. 51–62, Jan. 2002.

A. P. Chandrakasan and R. W. Brodersen, ―Low Power Digital CMOS Design‖ Amsterdam,the Netherlands: Kluwer Academic, 1995.

D. E. Lewis, ―Assistive Devices for classroom listening: FM systems,‖ Amer. J. Audiology, vol. 3, pp. 70–83, 1994.

M. Mehendale and S. D. Sherlekar, VLSI Synthesis of DSP Kernels-Algorithmic and Architectural Transformations. Amsterdam, the Netherlands: Kluwer Academic, 2001.

M. Vishwanath, ―The recursive pyramid algorithm for the discrete wavelet transform,‖ IEEE Trans. Signal Process., vol. 42, no. 3, pp. 673–676, Mar. 1994.

P. P. Vaidyanathan, Multirate Systems and Filter Banks. , New Jersey: Prentice Hall, 1993.

L. R. Rabiner and B. Gold, Theory and Application of Digital Signal Processing. New York: Prentice Hall, 1975.


Refbacks

  • There are currently no refbacks.


Creative Commons License
This work is licensed under a Creative Commons Attribution 3.0 License.