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Understanding speech-in-noise perception in adults: exploring the relative contributions of noise exposure, musical training and cognition

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posted on 29.03.2022, 01:54 authored by Ingrid Audrey Yeend
Background. Current estimates are that between 5-15% of adults who present to medical or audiology clinics for hearing assessment, with concerns about difficulty understanding speech in background noise, are found to have normal pure-tone audiometric thresholds. Al though there is consensus amongst researchers that the audiogram inadequately reflects functional everyday listening, it remains unclear why, within the population of normal - hearing listeners, some people experience greater than expected perceptual difficulties. One suggestion is that excessive noise exposure may cause cochlear synaptopathy in humans, and subsequently lead to suprathreshold auditory processing and speech-in-noise difficulties prior to a clinical diagnosis of hearing loss. It has also been suggested that musical training may ameliorate any deficits arising from noise exposure, by enhancing speech perception in challenging listening environments, but there is debate as to whether such a 'musician advantage' is related to superior neural encoding of sound and/or higher order cognitive processes. Aims and objectives. The overarching goal of this thesis was to understand why some adults in their mid - years, despite having normal or 'near - normal' hearing thresholds, experience greater than expected difficulty understanding speech in noisy environments. Three studies were undertaken. Study 1 aimed to: (i) investigate whether noise exposure was associated with diminished auditory processing skills, including speech - in - noise perception ; and (ii) explore whether musical training is associated with improvements in aspects of auditory processing and counteracted any negative impacts of noise exposure. Study 2 aimed to : (i) identify the main factors that differentiated listeners with regard to their speech-in-noise perception; (ii) develop a model that predicted speech-in-noise difficulties; and (iii) evaluate the model's effectiveness as a 'diagnostic criterion'. Study 3 aimed to determine behavioural and physiological evidence of the 'musician advantage' ...

History

Table of Contents

Chapter 1. Introduction -- Chapter 2. The effects of noise exposure and musical training on suprathreshold auditory processing and speech perception in noise -- Chapter 3. Working memory and extended high-frequency hearing in adults: diagnostic predictors of speech-in-noise perception -- Chapter 4. Attention and auditory processing skills in musicians -- Chapter 5. Case studies -- Chapter 6. Final discussion --

Notes

Bibliography: pages 100-122 Theoretical thesis.

Awarding Institution

Macquarie University

Degree Type

Thesis PhD

Degree

PhD, Macquarie University, Faculty of Human Sciences, Department of Linguistics

Department, Centre or School

Department of Linguistics

Year of Award

2019

Principal Supervisor

Elizabeth Beach

Rights

Copyright Ingrid Audrey Yeend 2019. Copyright disclaimer: http://mq.edu.au/library/copyright

Language

English

Extent

1 online resource (xiv, 147 pages) illustrations

Former Identifiers

mq:71856 http://hdl.handle.net/1959.14/1278804