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Effect of inter-aural modulation depth difference on interaural time difference thresholds for speech: An observational study
Background: The temporal envelope (ENV) plays a vital role in conveying inter-aural time difference (ITD) in many clinical populations. However, the presence of background noise and electronic features, such as compression, reduces the modulation depth of ENV to a different degree in both ears. The...
Autores principales: | , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
F1000 Research Limited
2020
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7383721/ https://www.ncbi.nlm.nih.gov/pubmed/32765838 http://dx.doi.org/10.12688/f1000research.21379.1 |
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author | Pitchaimuthu, Arivudainambi Kanagokar, Vibha Grama Bhagavan, Srividya Bhat, Jayashree S. |
author_facet | Pitchaimuthu, Arivudainambi Kanagokar, Vibha Grama Bhagavan, Srividya Bhat, Jayashree S. |
author_sort | Pitchaimuthu, Arivudainambi |
collection | PubMed |
description | Background: The temporal envelope (ENV) plays a vital role in conveying inter-aural time difference (ITD) in many clinical populations. However, the presence of background noise and electronic features, such as compression, reduces the modulation depth of ENV to a different degree in both ears. The effect of ENV modulation depth differences between the ears on ITD thresholds is unknown; therefore, this was the aim of the current study’s investigation. Methods: Six normally hearing young adults (age range 20-30 years) participated in the current study. Six vowel-consonant-vowel (VCV) (/aka/, /aga/, /apa/, /aba/, /ata/, /ada/) tokens were used as the probe stimuli. ENV depth of VCV tokens was smeared by 0%, 29%, and 50%, which results in 100%, 71%, and 50% of the original modulation depth. ITD thresholds were estimated as a function of the difference in temporal ENV depth between the ears, wherein in one ear the modulation depth was retained at 100% and in the other ear, the modulation depth was changed to 100%, 71%, and 50%. Results: Repeated measures of ANOVA revealed a significant main effect of interaural modulation depth differences on the ITD threshold (F(2,10)= 9.04, p= 0.006). ITD thresholds increased with an increase in the inter-aural modulation depth difference. Conclusion: Inter-aural ENV depth is critical for ITD perception. |
format | Online Article Text |
id | pubmed-7383721 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | F1000 Research Limited |
record_format | MEDLINE/PubMed |
spelling | pubmed-73837212020-08-05 Effect of inter-aural modulation depth difference on interaural time difference thresholds for speech: An observational study Pitchaimuthu, Arivudainambi Kanagokar, Vibha Grama Bhagavan, Srividya Bhat, Jayashree S. F1000Res Research Article Background: The temporal envelope (ENV) plays a vital role in conveying inter-aural time difference (ITD) in many clinical populations. However, the presence of background noise and electronic features, such as compression, reduces the modulation depth of ENV to a different degree in both ears. The effect of ENV modulation depth differences between the ears on ITD thresholds is unknown; therefore, this was the aim of the current study’s investigation. Methods: Six normally hearing young adults (age range 20-30 years) participated in the current study. Six vowel-consonant-vowel (VCV) (/aka/, /aga/, /apa/, /aba/, /ata/, /ada/) tokens were used as the probe stimuli. ENV depth of VCV tokens was smeared by 0%, 29%, and 50%, which results in 100%, 71%, and 50% of the original modulation depth. ITD thresholds were estimated as a function of the difference in temporal ENV depth between the ears, wherein in one ear the modulation depth was retained at 100% and in the other ear, the modulation depth was changed to 100%, 71%, and 50%. Results: Repeated measures of ANOVA revealed a significant main effect of interaural modulation depth differences on the ITD threshold (F(2,10)= 9.04, p= 0.006). ITD thresholds increased with an increase in the inter-aural modulation depth difference. Conclusion: Inter-aural ENV depth is critical for ITD perception. F1000 Research Limited 2020-02-13 /pmc/articles/PMC7383721/ /pubmed/32765838 http://dx.doi.org/10.12688/f1000research.21379.1 Text en Copyright: © 2020 Pitchaimuthu A et al. http://creativecommons.org/licenses/by/4.0/ This is an open access article distributed under the terms of the Creative Commons Attribution Licence, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. |
spellingShingle | Research Article Pitchaimuthu, Arivudainambi Kanagokar, Vibha Grama Bhagavan, Srividya Bhat, Jayashree S. Effect of inter-aural modulation depth difference on interaural time difference thresholds for speech: An observational study |
title | Effect of inter-aural modulation depth difference on interaural time difference thresholds for speech: An observational study |
title_full | Effect of inter-aural modulation depth difference on interaural time difference thresholds for speech: An observational study |
title_fullStr | Effect of inter-aural modulation depth difference on interaural time difference thresholds for speech: An observational study |
title_full_unstemmed | Effect of inter-aural modulation depth difference on interaural time difference thresholds for speech: An observational study |
title_short | Effect of inter-aural modulation depth difference on interaural time difference thresholds for speech: An observational study |
title_sort | effect of inter-aural modulation depth difference on interaural time difference thresholds for speech: an observational study |
topic | Research Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7383721/ https://www.ncbi.nlm.nih.gov/pubmed/32765838 http://dx.doi.org/10.12688/f1000research.21379.1 |
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