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dc.contributor.advisorCone, Barbara
dc.contributor.authorIchiba, Kayla
dc.creatorIchiba, Kayla
dc.date.accessioned2020-05-22T21:57:29Z
dc.date.available2020-05-22T21:57:29Z
dc.date.issued2020
dc.identifier.urihttp://hdl.handle.net/10150/641407
dc.description.abstractThis study evaluates the effect of phase change on auditory steady-state (ASSR), onset CAEP and ACC responses. The aim was to determine how phase change is encoded at lower levels of the auditory system and then processed at the cortical level. The test subjects were 23 young adults with normal hearing. ASSRs and stimulus-onset CAEPs were first recorded in a control condition using a 800 ms duration 500 Hz tone, amplitude modulated at 80 Hz, presented binaurally at 1/s. In the test condition, the phase of the 500 Hz tone was inverted 180° in one ear at 400 ms to evoke the ACC. Broad-band noise was introduced at an -5 dB SNR and the test condition repeated. Stimulus levels were varied to find the threshold of the ACC. Perceptual binaural masking level differences (BMLD) for a 500 Hz tone were also determined. At the phase change, ASSR amplitudes showed no difference between the in-phase and on-phase condition, and the ACC was 1.5-2.0 times larger than the onset CAEP response. This indicates amplification of the phase-change information in the ascending auditory pathway. These findings contribute to the development of an electrophysiological index for BMLD.
dc.language.isoen
dc.publisherThe University of Arizona.
dc.rightsCopyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction, presentation (such as public display or performance) of protected items is prohibited except with permission of the author.
dc.subjectacoustic change complex
dc.subjectaudiology
dc.subjectauditory evoked potentials
dc.subjectbinaural masking level difference
dc.subjectcentral auditory evoked potentials
dc.subjectelectrophysiology
dc.titleElectrophysiologic Measures For Binaural Masking Level Difference
dc.typetext
dc.typeElectronic Dissertation
thesis.degree.grantorUniversity of Arizona
thesis.degree.leveldoctoral
dc.contributor.committeememberVelenovsky, David
dc.contributor.committeememberMusiek, Frank
dc.contributor.committeememberMiller, Julie
thesis.degree.disciplineGraduate College
thesis.degree.disciplineSpeech, Language, & Hearing Sciences
thesis.degree.nameAu.D.
refterms.dateFOA2020-05-22T21:57:29Z


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