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

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ID: 73213
2019
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Abstract
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.
Reference Key
casaponsa2019doesplos Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Casaponsa, Aina;Sohoglu, Ediz;Moore, David R;Füllgrabe, Christian;Molloy, Katharine;Amitay, Sygal;
Journal PloS one
Year 2019
DOI
10.1371/journal.pone.0226288
URL
Keywords
deep brain stimulation movement disorders speech essential tremor dysarthria oral diadochokinesia

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