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Does training with amplitude modulated tones affect tone-vocoded speech perception?

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journal contribution
posted on 22.01.2020, 11:42 by Aina Casaponsa, Ediz Sohoglu, David R. Moore, Christian Fullgrabe, Katharine Molloy, Sygal Amitay
Temporal-envelope cues are essential for successful speech perception. We asked here whether training on stimuli containing temporal-envelope cues without speech content can improve the perception of spectrally-degraded (vocoded) speech in which the temporal-envelope (but not the temporal fine structure) is mainly preserved. Two groups of listeners were trained on different amplitude-modulation (AM) based tasks, either AM detection or AM-rate discrimination (21 blocks of 60 trials during two days, 1260 trials; frequency range: 4Hz, 8Hz, and 16Hz), while an additional control group did not undertake any training. Consonant identification in vocoded vowel-consonant-vowel stimuli was tested before and after training on the AM tasks (or at an equivalent time interval for the control group). Following training, only the trained groups showed a significant improvement in the perception of vocoded speech, but the improvement did not significantly differ from that observed for controls. Thus, we do not find convincing evidence that this amount of training with temporal-envelope cues without speech content provide significant benefit for vocoded speech intelligibility. Alternative training regimens using vocoded speech along the linguistic hierarchy should be explored.

Funding

Medical Research Council (UK) Grant U135097130

History

School

  • Sport, Exercise and Health Sciences

Published in

PLoS ONE

Volume

14

Issue

12

Publisher

Public Library of Science

Version

VoR (Version of Record)

Rights holder

© Casaponsa et al.

Publisher statement

This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

Acceptance date

22/11/2019

Publication date

2019-12-27

Copyright date

2019

eISSN

1932-6203

Language

en

Depositor

Dr Christian Fullgrabe. Deposit date: 18 January 2020

Article number

e0226288

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