EFFECTS OF INTERRUPTING NOISE AND SPEECH REPAIR MECHANISMS IN ADULT COCHLEAR-IMPLANT USERS

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dc.contributor.advisorGoupell, Matthew Jen_US
dc.contributor.advisorNewman, Rochelle Sen_US
dc.contributor.authorJaekel, Brittany Nicoleen_US
dc.contributor.departmentHearing and Speech Sciencesen_US
dc.contributor.publisherDigital Repository at the University of Marylanden_US
dc.contributor.publisherUniversity of Maryland (College Park, Md.)en_US
dc.date.accessioned2020-09-25T05:35:35Z
dc.date.available2020-09-25T05:35:35Z
dc.date.issued2020en_US
dc.description.abstractThe long-term objective of this project is to help cochlear-implant (CI) users achieve better speech understanding in noisy, real-world listening environments. The specific objective of the proposed research is to evaluate why speech repair (“restoration”) mechanisms are often atypical or absent in this population. Restoration allows for improved speech understanding when signals are interrupted with noise, at least among normal-hearing listeners. These experiments measured how CI device factors like noise-reduction algorithms and compression and listener factors like peripheral auditory encoding and linguistic skills affected restoration mechanisms. We hypothesized that device factors reduce opportunities to restore speech; noise in the restoration paradigm must act as a plausible masker in order to prompt the illusion of intact speech, and CIs are designed to attenuate noise. We also hypothesized that CI users, when listening with an ear with better peripheral auditory encoding and provided with a semantic cue, would show improved restoration ability. The interaction of high-quality bottom-up acoustic information with top-down linguistic knowledge is integral to the restoration paradigm, and thus restoration could be possible if CI users listen to noise-interrupted speech with a “better ear” and have opportunities to utilize their linguistic knowledge. We found that CI users generally failed to restore speech regardless of device factors, ear presentation, and semantic cue availability. For CI users, interrupting noise apparently serves as an interferer rather than a promoter of restoration. The most common concern among CI users is difficulty understanding speech in noisy listening conditions; our results indicate that one reason for this difficulty could be that CI users are unable to utilize tools like restoration to process noise-interrupted speech effectively.en_US
dc.identifierhttps://doi.org/10.13016/yrhj-lgft
dc.identifier.urihttp://hdl.handle.net/1903/26441
dc.language.isoenen_US
dc.subject.pqcontrolledBehavioral sciencesen_US
dc.subject.pqcontrolledAudiologyen_US
dc.subject.pqcontrolledPsychologyen_US
dc.subject.pquncontrolledCochlear implantsen_US
dc.subject.pquncontrolledPerceptual restorationen_US
dc.subject.pquncontrolledSpeech perceptionen_US
dc.titleEFFECTS OF INTERRUPTING NOISE AND SPEECH REPAIR MECHANISMS IN ADULT COCHLEAR-IMPLANT USERSen_US
dc.typeDissertationen_US

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