Spectrotemporal Modulation Sensitivity in Hearing-Impaired Listeners

dc.contributor.advisorShamma, Shihaben_US
dc.contributor.authorMehraei, Golbargen_US
dc.contributor.departmentElectrical Engineeringen_US
dc.contributor.publisherDigital Repository at the University of Marylanden_US
dc.contributor.publisherUniversity of Maryland (College Park, Md.)en_US
dc.description.abstractSpeech is characterized by temporal and spectral modulations. Hearing-impaired (HI) listeners may have reduced spectrotemporal modulation (STM) sensitivity, which could affect their speech understanding. This study examined effects of hearing loss and absolute frequency on STM sensitivity and their relationship to speech intelligibility, frequency selectivity and temporal fine-structure (TFS) sensitivity. Sensitivity to STM applied to four-octave or one-octave noise carriers were measured for normal-hearing and HI listeners as a function of spectral modulation, temporal modulation and absolute frequency. Across-frequency variation in STM sensitivity suggests that broadband measurements do not sufficiently characterize performance. Results were simulated with a cortical STM-sensitivity model. No correlation was found between the reduced frequency selectivity required in the model to explain the HI STM data and more direct notched-noise estimates. Correlations between low-frequency and broadband STM performance, speech intelligibility and frequency-modulation sensitivity suggest that speech and STM processing may depend on the ability to use TFS.en_US
dc.subject.pqcontrolledEngineering, Electronics and Electricalen_US
dc.subject.pqcontrolledHealth Sciences, Audiologyen_US
dc.subject.pquncontrolledHearing Impaireden_US
dc.subject.pquncontrolledNormal hearingen_US
dc.subject.pquncontrolledSpectral modulationen_US
dc.subject.pquncontrolledSpectrotemporal Modulationen_US
dc.subject.pquncontrolledSpeech intelligibilityen_US
dc.subject.pquncontrolledtemporal modulationen_US
dc.titleSpectrotemporal Modulation Sensitivity in Hearing-Impaired Listenersen_US


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