Adaptive gain processing with offending frequency suppression for digital hearing aids

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Publication Type Journal Article
School or College College of Engineering
Department Electrical & Computer Engineering
Creator Mathews, V. John
Other Author Pandey, Ashutosh
Title Adaptive gain processing with offending frequency suppression for digital hearing aids
Date 2012
Description Digital hearing aids identify acoustic feedback signals and cancel them continuously in a closed loop with an adaptive filter. This scheme facilitates larger hearing aid gain and improves the output sound quality of hearing aids. However, the output sound quality deteriorates as the hearing aid gain is increased. This paper presents two methods to modify the forward path gain in digital hearing aids. The first approach employs a variable, frequency-dependent gain function that is lower at frequencies of the incoming signal where the information is perceptually insignificant. The second method of this paper automatically identifies and suppresses residual acoustical feedback components at frequencies that have the potential to drive the system to instability. The suppressed frequency components are monitored and the suppression is removed when such frequencies no longer pose a threat to drive the hearing aid system into instability. Together, the gain processing methods of this paper provide 8 to 12 dB more hearing aid gain than feedback cancelers with fixed gain functions. Furthermore, experimental results obtained with real world hearing aid gain profiles indicate that the gain processing methods of this paper, individually and combined, provide less distortion in the output sound quality than classical feedback cancelers enabling the use of more comfortable style hearing aids for patients with moderate to profound hearing loss.
Type Text
Publisher Institute of Electrical and Electronics Engineers (IEEE)
First Page 1043
Last Page 1055
Language eng
Bibliographic Citation Pandey, A., & Mathews, V. J. (2012). Adaptive gain processing with offending frequency suppression for digital hearing aids. IEEE Transactions on Audio, Speech and Language Processing, 20(3), 6036152, 1043-55.
Rights Management ©2012 IEEE. 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 to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.
Format Medium application/pdf
Format Extent 1,248,888 bytes
Identifier ir-main,17146
ARK ark:/87278/s6vm4wxv
Setname ir_uspace
Date Created 2012-06-13
Date Modified 2021-05-06
ID 706987
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