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Speech perception in individuals with auditory dys-synchrony: effect of lengthening of voice onset time and burst duration of speech segments

Published online by Cambridge University Press:  21 June 2013

U A Kumar  and
M Jayaram
U A Kumar*
Affiliation:
Department of Audiology, All India Institute of Speech and Hearing, Naimisham Campus, Manasagangothri, Mysore, India
M Jayaram
Affiliation:
Department of Speech Pathology and Audiology, National Institute of Mental Health and Neurosciences, Bangalore, India
*
Address for correspondence: Dr U A Kumar, Reader, Department of Audiology, All India Institute of Speech and Hearing, Naimisham Campus, Manasagangothri, Mysore 570006, India E-mail: [email protected]
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Abstract

Objective:

The purpose of this study was to evaluate the effect of lengthening of voice onset time and burst duration of selected speech stimuli on perception by individuals with auditory dys-synchrony. This is the second of a series of articles reporting the effect of signal enhancing strategies on speech perception by such individuals.

Methods:

Two experiments were conducted: (1) assessment of the ‘just-noticeable difference' for voice onset time and burst duration of speech sounds; and (2) assessment of speech identification scores when speech sounds were modified by lengthening the voice onset time and the burst duration in units of one just-noticeable difference, both in isolation and in combination with each other plus transition duration modification.

Results:

Lengthening of voice onset time as well as burst duration improved perception of voicing. However, the effect of voice onset time modification was greater than that of burst duration modification. Although combined lengthening of voice onset time, burst duration and transition duration resulted in improved speech perception, the improvement was less than that due to lengthening of transition duration alone.

Conclusion:

These results suggest that innovative speech processing strategies that enhance temporal cues may benefit individuals with auditory dys-synchrony.

Keywords

Auditory Processing DisorderAuditory Brainstem ResponseSpeech Perception
Type
Main Articles
Information
The Journal of Laryngology & Otology , Volume 127 , Issue 7 , July 2013 , pp. 656 - 665
Copyright
Copyright © JLO (1984) Limited 2013 

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