Medicine and Health Sciences Commons^™

User Preferences For Hearing Aid Features: Outcomes, Concepts, And Test Construction, Hasan Saleh

Electronic Thesis and Dissertation Repository

Modern hearing aids can vary in both digital signal processing (DSP) and non-signal processing (non-DSP) features. The complexity and availability of these features can differ at opposite ends of the technology spectrum, potentially influencing aided benefit and preference. Furthermore, the amount of feature choices in modern hearing aids has led to increasing complexity in the selection process.

The first aim of this dissertation was to investigate the aided benefit and preference differences between premium and entry-level hearing aids, and to investigate the drivers of any preference differences. No significant differences were found between the entry-level and premium hearing aids in …

Understanding Hearing Aid Sound Quality For Music-Listening, Jonathan Matthew Vaisberg

Electronic Thesis and Dissertation Repository

To improve speech intelligibility for individuals with hearing loss, hearing aids amplify speech using gains derived from evidence-based prescriptive methods, in addition to other advanced signal processing mechanisms. While the evidence supports the use of hearing aid signal processing for speech intelligibility, these signal processing adjustments can also be detrimental to hearing aid sound quality, with poor hearing aid sound quality cited as a barrier to device adoption. Poor sound quality is also of concern for music-listening, in which intelligibility is likely not a consideration. A series of electroacoustic and behavioural studies were conducted to study sound quality issues in …

Manipulation Of Auditory Feedback In Individuals With Normal Hearing And Hearing Loss, Le Truc Linh Vaccarello

Electronic Thesis and Dissertation Repository

Auditory feedback, the hearing of one’s own voice, plays an important role in the detection of speech errors and the regulation of speech production. The limited auditory cues available with a hearing loss can reduce the ability of individuals with hearing loss to use their auditory feedback. Hearing aids are a common assistive device that amplifies inaudible sounds. Hearing aids can also change auditory feedback through digital signal processing, such as frequency lowering. Frequency lowering moves high frequency information of an incoming auditory stimulus into a lower frequency region where audibility may be better. This can change how speech sounds …

Predictors Of Language Outcome For Children In The Ontario Infant Hearing Program, Olivia M. Daub

Electronic Thesis and Dissertation Repository

The Ontario Infant Hearing Program (OIHP) provides early interventions (i.e., hearing aids) to children who are hard of hearing (CHH) because research consistently demonstrates their benefit to language outcomes. The impact of pre-fitting language abilities on these outcomes are not well understood.

This retrospective cohort analysis examined the performance of OIHP children on the Preschool Language Scale-4 at the time of (n=47), and after (n=19), initial hearing aid intervention. Regression analyses revealed that, before amplification, hearing loss severity predicted language abilities. However, after amplification, severity of hearing loss did not uniquely predict language achievement, but rather …

Effects Of Coordinated Bilateral Hearing Aids And Auditory Training On Sound Localization, Iman Elsabah Ibrahim

Electronic Thesis and Dissertation Repository

This thesis has two main objectives: 1) evaluating the benefits of the bilateral coordination of the hearing aid Digital Signal Processing (DSP) features by measuring and comparing the auditory performance with and without the activation of this coordination, and 2) evaluating the benefits of acclimatization and auditory training on such auditory performance and, determining whether receiving training in one aspect of auditory performance (sound localization) would generalize to an improvement in another aspect of auditory performance (speech intelligibility in noise), and to what extent. Two studies were performed. The first study evaluated the speech intelligibility in noise and horizontal sound …

Development And Evaluation Of An Audiological Outcome Measure Guideline For Use With Infants, Toddlers, And Preschool Children, Marlene P. Bagatto

Electronic Thesis and Dissertation Repository

The goals of the current work were to: 1) identify caregiver report questionnaires for inclusion in an outcome evaluation guideline for infants, toddlers, and preschool children who wear hearing aids and 2) evaluate the chosen tools to determine their usefulness for the population of interest. A critical review of auditory-related subjective outcome evaluation tools for infants, toddlers, and preschool children is presented (Chapter 2). Good psychometric properties and clinical feasibility were considered important elements for the guideline (Andresen, 2000). Existing norms for the chosen questionnaires were validated with normal hearing children from Canadian English-speaking families (Chapters 3 and 5). Finally, …

An Integrated Knowledge Translation Experience: Use Of The Network Of Pediatric Audiologists Of Canada To Facilitate The Development Of The University Of Western Ontario Pediatric Audiological Monitoring Protocol (Uwo Pedamp V1.0)., Sheila T F Moodie

Electronic Thesis and Dissertation Repository

The goals of this project were: (1) to determine the important factors that influence implementation of evidence-based practice by Canadian audiologists; and (2) to utilize the knowledge-to-action process (Graham et al., 2006) during the development of a guideline for outcome measures to evaluate the auditory development and performance of young children who wear hearing aids, to facilitate clinical uptake and identify barriers to implementation (Bagatto, Moodie & Scollie, 2010; Bagatto et al., 2011; Bagatto, Moodie, Seewald, Bartlett, & Scollie, 2011; Moodie, Bagatto et al., 2011; Moodie, Kothari et al., 2011).

Two projects (Chapters 3 and 4) included the participation of …

Non-Quiet Listening For Children With Hearing Loss: An Evaluation Of Amplification Needs And Strategies, Jeff Crukley

Electronic Thesis and Dissertation Repository

The goals of this project were to identify and evaluate strategies for non-quiet listening needs of children with hearing loss who wear hearing instruments.

Three studies were undertaken: 1) an exploration of the listening environments and situations experienced by children from daycare to high school during the school-day; 2) a comparative evaluation of consonant recognition, sentence recognition in noise, and loudness perception with the Desired Sensation Level version 5 (DSL v5) Quiet and Noise prescriptions and 3) a comparative evaluation of sentence recognition in noise and loudness perception with DSL v 5 Quiet and Noise paired with the hearing instrument …