Suppression and comodulation masking release in normal-hearing and hearing-impaired listeners

The Journal of the Acoustical Society of America
Stephan M A ErnstJesko L Verhey

Abstract

The detectability of a sinusoidal signal embedded in a masker at the signal frequency can be improved by simultaneously presenting additional maskers in off-frequency regions if the additional maskers and the on-frequency masker component have the same temporal envelope. This effect is commonly referred to as comodulation masking release (CMR). Recently, it was hypothesized that peripheral nonlinear processes such as suppression may play a role in CMR over several octaves when the level of the off-frequency masker component is higher than the level of the on-frequency masker component. The aim of the present study was to test this hypothesis by measuring suppression and CMR within the same subjects for various frequency-level combinations of the off-frequency masker component. Experimental data for normal-hearing listeners show a large overlap between the existence regions for suppression and CMR. Hearing-impaired subjects with a sensorineural hearing loss show, on average, negligible suppression and CMR. The data support the hypothesis that part of the CMR in experiments with large spectral distances and large level differences between the masker components is due to the nonlinear processing at the level of the cochlea.

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Citations

Jan 15, 2014·Journal of the Association for Research in Otolaryngology : JARO·Robert H Pierzycki, Bernhard U Seeber
Jul 12, 2012·The Journal of the Acoustical Society of America·Simon A GoldmanBrian C J Moore
Jan 10, 2013·The Journal of the Acoustical Society of America·Torsten DauStephan D Ewert
Mar 13, 2014·The Journal of the Acoustical Society of America·J HotsJ L Verhey
Jun 9, 2014·The Journal of the Acoustical Society of America·Simon Krogholt Christiansen, Andrew J Oxenham
Nov 18, 2011·The Journal of the Acoustical Society of America·Simon A GoldmanBrian C J Moore
Oct 3, 2015·The Journal of the Acoustical Society of America·Jennifer J Lentz, Susie Valentine
Jun 3, 2016·The Journal of the Acoustical Society of America·Jan HotsJesko L Verhey
Apr 6, 2021·Frontiers in Psychology·Alexander FischenichDaniel Oberfeld

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