The effect of background noise on subcortical neural encoding of speech in normal hearing individuals

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dc.contributor.advisorAnanthakrishnan, Saradha
dc.contributor.authorSomers, Laura M.
dc.contributor.departmentTowson University. Department of Audiology, Speech-Language Pathology and Deaf Studies
dc.date.accessioned2015-12-17T19:35:21Z
dc.date.available2015-12-17T19:35:21Z
dc.date.issued2015-08-10
dc.date.submitted2016-05
dc.description(Au. D.) -- Towson University, 2016.
dc.description.abstractThe purpose of the current research is to investigate the effects of background noise on subcortical neural encoding of speech in normal hearing individuals. It was proposed that increasing levels of background noise would degrade the Frequency Following Response (FFR). Six participants (age 23-24 years) participated in the current study. The Frequency Following Response was recorded on all six subjects in four different conditions: clean, 0 dB SNR, + 5 dB SNR, and -5 dB SNR. Grand average temporal waveforms were obtained across the 6 subjects for each listening condition. MATLAB software was used to analyze the temporal waveforms in the frequency domain. An FFT analysis was used to break down the response into the constituent frequencies. The magnitude of energy in the FFR spectrum at the fundamental frequency and first formant were measured in each test condition for each individual participant. Mean FFT values and standard deviation were also calculated. Results showed that the F0 magnitude and derived SNR for F1 decreased with increasing levels of background noise. Overall, it was concluded that the FFR was most degraded in the most severe background noise listening condition.
dc.formatapplication/pdf
dc.format.extentx, 106 pages
dc.genretheses
dc.identifierdoi:10.13016/M27T4M
dc.identifier.otherTSP2015Somers
dc.identifier.urihttp://hdl.handle.net/11603/2046
dc.language.isoeng
dc.relation.ispartofTowson University Archives
dc.relation.ispartofTowson University Electronic Theses and Dissertations
dc.relation.ispartofTowson University Institutional Repository
dc.rightsCopyright protected, all rights reserved.
dc.titleThe effect of background noise on subcortical neural encoding of speech in normal hearing individuals
dc.typeText
dcterms.accessRightsThere are no restrictions on access to this document. An internet release form signed by the author to display this document online is on file with Towson University Special Collections and Archives.

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