Grand Rounds  |   June 2010
Auditory Processing Disorder and Speech Perception Problems in Noise: Finding the Underlying Origin
Author Affiliations & Notes
  • Josée Lagacé
    Université de Montréal and Centre de recherche du Centre Hospitalier Universitaire Sainte-Justine, Montreal, Quebec, Canada
  • Benoît Jutras
    Université de Montréal and Centre de recherche du Centre Hospitalier Universitaire Sainte-Justine, Montreal, Quebec, Canada
  • Jean-Pierre Gagné
    Université de Montréal and Centre de recherche de l’Institut Universitaire de Gériatrie de Montréal
  • Contact author: Josée Lagacé, who is now with the Audiology and Speech-Language Program, Faculty of Health Sciences, University of Ottawa, Roger Guindon Hall, 451 Smyth Road, Ottawa, Ontario, Canada KIH 8M5. E-mail: josee.lagace@uottawa.ca.
Article Information
Hearing & Speech Perception / Acoustics / Hearing Disorders / Attention, Memory & Executive Functions
Grand Rounds   |   June 2010
Auditory Processing Disorder and Speech Perception Problems in Noise: Finding the Underlying Origin
American Journal of Audiology, June 2010, Vol. 19, 17-25. doi:10.1044/1059-0889(2010/09-0022)
History: Received July 15, 2009 , Revised February 1, 2010 , Accepted March 13, 2010
American Journal of Audiology, June 2010, Vol. 19, 17-25. doi:10.1044/1059-0889(2010/09-0022)
History: Received July 15, 2009; Revised February 1, 2010; Accepted March 13, 2010
Web of Science® Times Cited: 5

Purpose: A hallmark listening problem of individuals presenting with auditory processing disorder (APD) is their poor recognition of speech in noise. The underlying perceptual problem of the listening difficulties in unfavorable listening conditions is unknown. The objective of this article was to demonstrate theoretically how to determine whether the speech recognition problems are related to an auditory dysfunction, a language-based dysfunction, or a combination of both.

Method: Tests such as the Speech Perception in Noise (SPIN) test allow the exploration of the auditory and language-based functions involved in speech perception in noise, which is not possible with most other speech-in-noise tests. Psychometric functions illustrating results from hypothetical groups of individuals with APD on the SPIN test are presented. This approach makes it possible to postulate about the origin of the speech perception problems in noise.

Conclusion: APD is a complex and heterogeneous disorder for which the underlying deficit is currently unclear. Because of their design, SPIN-like tests can potentially be used to identify the nature of the deficits underlying problems with speech perception in noise for this population. A better understanding of the difficulties with speech perception in noise experienced by many listeners with APD should lead to more efficient intervention programs.

Acknowledgment
This work was supported by a doctoral fellowship from the Centre de recherche du CHU Sainte-Justine and Fonds québécois de la recherche sur la nature et les technologies.
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