Show simple item record

dc.contributor.authorChan, Kit Yan
dc.contributor.authorLow, S.Y.
dc.contributor.authorNordholm, Sven
dc.contributor.authorYiu, Ka Fai
dc.identifier.citationChan, K.Y. and Low, S.Y. and Nordholm, S. and Yiu, K.F. 2014. A decision-directed adaptive gain equalizer for assistive hearing instruments. IEEE Transactions on instrumentation and Measurement. 63 (8): pp. 1886-1895.

Assistive hearing instruments have a significant impact on speech enhancement when the signal-to-noise ratio is low. These instruments are usually developed using the conventional adaptive gain equalizer (AGE), which has low computational complexity and low distortion in real-time speech enhancement. The conventional AGEs are intended to boost the speech segments of speech signals but they are incapable of suppressing noise segments. The overall speech quality of the assistive hearing instruments may be reduced, as the noise segments still cannot be filtered out. In this paper, a decision-directed AGE is proposed for assistive hearing instruments. It aims to overcome the limitation of the conventional AGE, which is capable only of boosting speech segments in noisy speech but incapable of suppressing noise segments. The proposed approach simultaneously boosts the speech segments and suppresses noise segments in noisy speech. Experimental results with different types of real-world noise indicate that the proposed method achieves better speech quality than does the conventional AGE. The resulting method provides an improved functionality for assistive hearing instruments.

dc.subjectparticle swarm optimization
dc.subjectadaptive gain equalizer
dc.subjectPerceptual Evaluation of Speech Quality (PESQ)
dc.subjectspeech enhancement
dc.subjectheuristic algorithms
dc.subjectAssistive hearing instruments
dc.subjectspeech booster
dc.subjectsingle channel filter
dc.titleA decision-directed adaptive gain equalizer for assistive hearing instruments
dc.typeJournal Article
dcterms.source.titleIEEE Transactions on instrumentation and Measurement

Copyright © 2014 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.

curtin.departmentDepartment of Electrical and Computer Engineering
curtin.accessStatusOpen access

Files in this item


This item appears in the following Collection(s)

Show simple item record