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Two-stage adaptive filtering techniques for noise cancellation in hearing aids

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Original languageEnglish
Title of host publicationInternational Symposium on Circuits and Systems
Publisher or commissioning bodyInstitute of Electrical and Electronics Engineers (IEEE)
Pages521 - 524
ISBN (Print)0780305930
StatePublished - May 1992
EventInternational Symposium on Circuits and Systems - San Diego, CA, United States


ConferenceInternational Symposium on Circuits and Systems
CountryUnited States
CitySan Diego, CA
Period1/05/92 → …


Most of the existing adaptive noise cancelling techniques produce little improvement in the intelligibility of speech for the hearing impaired in reverberant environments. In this paper we propose two-stage adaptive structures to improve speech intelligibility in noise. The first stage removes the interference and produces a distorted version of the signal. The second stage then removes this distortion and the clean signal is obtained. We suggest two algorithms: an unconstrained and a constrained one for the first stage. In high Signal-to-Noise Ratios (SNR) both perform very well and more than 20dB noise reduction may be achieved. In low SNR the constrained algorithm performs better with a slight increase in the computational load.

Additional information

Conference Proceedings/Title of Journal: IEEE International Symposium on Circuits and Systems, 1992 (ISCAS '92) Rose publication type: Conference contribution Terms of use: Copyright © 1992 IEEE. Reprinted from IEEE International Symposium on Circuits and Systems, 1992 (ISCAS '92). This material is posted here with permission of the IEEE. Such permission of the IEEE does not in any way imply IEEE endorsement of any of the University of Bristol's products or services. Internal or personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution must be obtained from the IEEE by writing to By choosing to view this document, you agree to all provisions of the copyright laws protecting it.


International Symposium on Circuits and Systems

Duration1 May 1992 → …
CitySan Diego, CA
CountryUnited States

Event: Conference

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