Duration discrimination in younger and older adults

Auteurs-es

  • T.R. Bergeson Department of Psychology, University of Toronto, Toronto Ont. L5L 1C6, Canada
  • B.A. Schneider Department of Psychology, University of Toronto, Toronto Ont. L5L 1C6, Canada
  • S.J. Hamstra Department of Psychology, University of Toronto, Toronto Ont. L5L 1C6, Canada

Mots-clés :

Audio equipment, Audition, Digital to analog conversion, Frequencies, Probability density function, Speech processing, Speech recognition, Speech transmission, Standards, Duration discrimination, Older adults, Speech sound, Standard tone, Young adults

Résumé

Nous avon demandé à des sujets jeunes (n = 10) et âgés (n = 10), dont l’acuité auditive est normale, d’identifier la plus longue de deux tonalités. La durée de la tonalité standard variait de 1,5 ms à 1000 ms. Pour un groupe des épreuves, la durée de la tonalité standard ne changeait pas. Le calcul des fractions Weber a démontré que lorsque la durée de la tonalité standard était moins de 40 ms, les seuils de détection de longueur etaient plus élevés chez les sujets âgés. Mais la difference dans les seuils de détection des jeunes adultes et des personnes âgés a diminuée quand la durée de la tontalité standard augmentait. Eventuellement, à la plus longue duréees, les différences entre les groupes d’âge dans les seuils de détection ont disparues. Aussi, les seuils de détection de longeur etaient indépendant de l’acuite auditive. Ces résultats demontrent que les sujets âgés sont plus désavantagés que le sujets jeunes pour discriminer les sons de discours de cortes durée. Ce desavantage ne peut pas être attribué au degré de déficience auditive.

Fichiers supplémentaires

Publié-e

2001-12-01

Comment citer

1.
Bergeson T, Schneider B, Hamstra S. Duration discrimination in younger and older adults. Canadian Acoustics [Internet]. 1 déc. 2001 [cité 8 mai 2026];29(4):3-9. Disponible à: https://jcaa.caa-aca.ca/index.php/jcaa/article/view/1410

Numéro

Vol. 29 No. 4 (2001)

Rubrique

Articles techniques

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