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    Towards the Development of the New Zealand Hearing in Noise Test (NZHINT) (2010)

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    Type of Content
    Theses / Dissertations
    UC Permalink
    http://hdl.handle.net/10092/4815
    http://dx.doi.org/10.26021/7544
    
    Thesis Discipline
    Audiology
    Degree Name
    Master of Audiology
    Publisher
    University of Canterbury. Department of Communication Disorders
    Collections
    • Science: Theses and Dissertations [4486]
    Authors
    Hope, Ruth Veronica
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    Abstract

    The ability to understand speech in noise has a profound impact on everyday communication, but cannot be predicted on the basis of puretone thresholds and/or performance on tests of speech in quiet. The aim of this thesis was to develop an adaptive speech in noise test based on the Hearing in Noise Test (HINT) that would be reliable and valid for speakers of New Zealand English (NZE). The methodology used followed the standard procedures for developing the HINT in a new language. Five hundred sentences of 5-7 syllables were collected from New Zealand children’s books and recorded by a native NZE speaker. Nine normal-hearing native NZE speakers aged 18-50 listened to three sets of 50 sentences at -2, -4 and -7 dB signal-to-noise ratios (SNR) in order to establish a performance-intensity (PI) function for these sentences. Three groups of 10 participants were scored on their performance on the sentences in 65 dBA speech-weighted noise at varying SNR. After each round of testing with a new group of participants, the SNR of each sentence was adjusted in order to get closer to 70% intelligibility for all sentences. Sentences that were too easy or difficult or did not respond to adjustments were discarded. Once the remaining 240 sentences were of approximately equal intelligibility, 24 phonemically matched lists of 10 sentences were formed and tested on 12 participants using the adaptive HINT software. The overall mean threshold was calculated as -6 dB, s.d=1.1 dB. The lists were combined to form 12 lists of 20 sentences which would become the NZHINT. Time delays meant that the collection of normative data could not be completed.

    Keywords
    Hearing in Noise Test; New Zealand English; speech test
    Rights
    Copyright Ruth Veronica Hope
    https://canterbury.libguides.com/rights/theses

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