The maturation of the acoustic change complex in response to iterated ripple noise in normal-hearing toddlers
department or school: Medicine, Faculty of
department or school: Audiology and Speech Sciences, School of
data provider: DSpace
degree campus: UBCV
creator: Strahm, Stephanie
issued: 2019-11-28T17:05:51Z
issued: 2019
related degree: Master of Science - MSc
degree grantor: University of British Columbia
description: With the introduction of newborn hearing screening and early intervention programs, there has been an increase in the number of early-identified hearing loss. However, clinical audiological test batteries do not currently include an objective (i.e., not requiring responses from the patient) measure of speech discrimination in very young infants and difficult-to-test populations. The ability to process temporal speech cues to discriminate between speech sounds is disrupted in all degrees of sensorineural hearing loss and in populations with auditory neuropathy spectrum disorder. The purpose of this study was to investigate the maturational time course of a cortical auditory evoked potential, the acoustic change complex (ACC) elicited to iterated ripple noise (IRN), as a possible clinical measure of speech perception capacity. Previously, Small et al. (in prep) determined that ACC responses to IRN stimuli are not mature in infants up to 16 months old. Participants were 27 children divided into two groups: 13 younger children (22 to 32 months; 6 males) and 14 older children (38 to 59 months; 5 males). IRN stimuli were created with varying degrees of pitch saliency by adjusting the number of iterations (4, 8, 16 & 32); each 500-ms IRN stimulus was concatenated to a 500-ms noise stimulus to generate noise-IRN (experimental) and noise-noise (control) conditions. Onset and ACC responses were recorded to all conditions presented binaurally under insert earphones while children were awake. All children had responses present to every IRN condition for at least one electrode site. Latencies decreased significantly as the number of iterations increased and the older children had significantly shorter ACC latencies than the younger group. Amplitudes were significantly smaller for the younger children compared to the older children; however, the effect of condition on ACC amplitudes between age groups did not reach significance. Children as young as 22 months old have ACC respons…
aggregated CHO: https://circle.library.ubc.ca/rest/handle/2429/72463
note: THE MATURATION OF THE ACOUSTIC CHANGE COMPLEX IN RESPONSE TO ITERATED RIPPLE NOISE IN NORMAL-HEARING TODDLERS by STEPHANIE STRAHM B.A., The University of Ottawa, 2013 M.A., The University of Ottawa, 2014 A THESIS SUBMITTED IN PARTIAL FULFILLMENT OF THE REQUIREMENTS FOR THE DEGREE OF MASTER OF SCIENCE in THE FACULTY OF GRADUATE AND POSTDOCTORAL STUDIES (Audiology and Speech Sciences) THE UNIVERSITY OF BRITISH COLUMBIA (Vancouver) November 2019 © Stephanie Strahm, 2019 ii The following individuals certify that they have read, and recommend to the Faculty of Graduate and Postdoctoral Studies for acceptance, the thesis entitled: The maturation of the acoustic change complex in response to iterated ripple noise in normal-hearing toddlers submitted by Stephanie Strahm in partial fulfillment of the requirements for the degree of Master of Science in Audiology and Speech Sciences Examining Committee: Susan Small, Associate Professor, UBC Supervisor Valter Ciocca, Professor, UBC Supervisory Committee Member Rae Riddler, Clinical Pediatric Audiologist Supervisory Committee Member iii Abstract With the introduction of newborn hearing screening and early intervention programs, there has been an increase in the number of early-identified hearing loss. However, clinical audiological test batteries do not currently include an objective (i.e., not requiring responses from the patient) measure of speech discrimination in very young infants and difficult-to-test populations. The ability to process temporal speech cues to discriminate between speech sounds is disrupted in all degrees of sensorineural hearing loss and in populations with auditory neuropathy spectrum disorder. The purpose of this study was to investigate the maturational time course of a cortical auditory evoked potential, the acoustic change complex (ACC) elicited to iterated ripple noise (IRN), as a possible clinical measure of speech perception capacity. Previously, Small et al. (in prep) determined that ACC respons…
has type: Thesis/Dissertation
date issued: 2020-05
is shown at: 10.14288/1.0386027
language: eng
degree discipline: Audiology and Speech Sciences
provider: Vancouver : University of British Columbia Library
publisher: University of British Columbia
rights: Attribution-NonCommercial-NoDerivatives 4.0 International
rights URI: http://creativecommons.org/licenses/by-nc-nd/4.0/
scholar level: Graduate
type: Text
identifier URI: http://hdl.handle.net/2429/72463