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dc.contributor.authorMoore, Brian
dc.date.accessioned2021-12-23T00:31:43Z
dc.date.available2021-12-23T00:31:43Z
dc.date.issued2022-01
dc.identifier.issn2331-2165
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/331745
dc.description.abstractSome of the problems experienced by users of hearing aids (HAs) when listening to music are relevant to cochlear implants (CIs). One problem is related to the high peak levels (up to 120 dB SPL) that occur in live music. Some HAs and CIs overload at such levels, because of the limited dynamic range of the microphones and analogue-to-digital converters (ADCs), leading to perceived distortion. Potential solutions are to use 24-bit ADCs or to include an adjustable gain between the microphones and the ADCs. A related problem is how to squeeze the wide dynamic range of music into the limited dynamic range of the user, which can be only 6-20 dB for CI users. In HAs, this is usually done via multi-channel amplitude compression (automatic gain control, AGC). In CIs, a single-channel front-end AGC is applied to the broadband input signal or a control signal derived from a running average of the broadband signal level is used to control the mapping of the channel envelope magnitude to an electrical signal. This introduces several problems: (1) an intense narrowband signal (e.g. a strong bass sound) reduces the level for all frequency components, making some parts of the music harder to hear; (2) the AGC introduces cross-modulation effects that can make a steady sound (e.g. sustained strings or a sung note) appear to fluctuate in level. Potential solutions are to use several frequency channels to create slowly varying gain-control signals and to use slow-acting (or dual time-constant) AGC rather than fast-acting AGC.
dc.description.sponsorshipMRC
dc.publisherSAGE Publications
dc.rightsAttribution 4.0 International
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.titleListening to Music Through Hearing Aids: Potential Lessons for Cochlear Implants.
dc.typeArticle
dc.publisher.departmentDepartment of Psychology
dc.date.updated2021-12-22T10:15:12Z
prism.publicationNameTrends Hear
dc.identifier.doi10.17863/CAM.79194
dcterms.dateAccepted2021-12-22
rioxxterms.versionofrecord10.1177/23312165211072969
rioxxterms.versionAM
dc.contributor.orcidMoore, Brian [0000-0001-7071-0671]
dc.identifier.eissn2331-2165
rioxxterms.typeJournal Article/Review
pubs.funder-project-idMedical Research Council (G0701870)
pubs.funder-project-idMedical Research Council (G8717539)
cam.orpheus.successWed Mar 23 10:26:20 GMT 2022 - Embargo updated
cam.orpheus.counter2
cam.depositDate2021-12-22
pubs.licence-identifierapollo-deposit-licence-2-1
pubs.licence-display-nameApollo Repository Deposit Licence Agreement
rioxxterms.freetoread.startdate2022-01-31


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Attribution 4.0 International
Except where otherwise noted, this item's licence is described as Attribution 4.0 International