Language:

Effects of degraded speech processing and binaural unmasking investigated using functional near-infrared spectroscopy (fNIRS)

PloS one, 2022-04, Vol.17 (4), p.e0267588 [Peer Reviewed Journal]

COPYRIGHT 2022 Public Library of Science ;2022 Zhou et al. This is an open access article distributed under the terms of the Creative Commons Attribution License: http://creativecommons.org/licenses/by/4.0/ (the “License”), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License. ;2022 Zhou et al 2022 Zhou et al ;ISSN: 1932-6203 ;EISSN: 1932-6203 ;DOI: 10.1371/journal.pone.0267588 ;PMID: 35468160

Full text available

Citations Cited by

Actions
1. Add to My Research
2. Remove from My Research
3. E-mail
4. Print
5. Permalink
6. Citation
7. EasyBib
8. EndNote
9. RefWorks
10. Delicious
11. Export RIS
12. Export BibTeX

Title:
Effects of degraded speech processing and binaural unmasking investigated using functional near-infrared spectroscopy (fNIRS)
Author: Zhou, Xin ; Sobczak, Gabriel S ; McKay, Colette M ; Litovsky, Ruth Y
Dykstra, Andrew R
Subjects: Acoustic Stimulation - methods ; Biology and Life Sciences ; Computational linguistics ; Configurations ; Correlation ; Cortex (auditory) ; Cortex (temporal) ; Degradation ; Ears & hearing ; Engineering and Technology ; Evaluation ; Hearing ; Hemoglobin ; Humans ; I.R. radiation ; Information processing ; Infrared spectra ; Infrared spectroscopy ; Intelligibility ; Investigations ; Language processing ; Listening ; Medical imaging ; Medicine and Health Sciences ; Natural language interfaces ; Near infrared radiation ; Near infrared spectroscopy ; Noise ; Noise threshold ; Perception ; Physical Sciences ; Prefrontal cortex ; Questions ; Research and Analysis Methods ; Social Sciences ; Spectroscopy, Near-Infrared ; Spectrum analysis ; Speech ; Speech Intelligibility ; Speech perception ; Speech Perception - physiology ; Speech processing
Is Part Of: PloS one, 2022-04, Vol.17 (4), p.e0267588
Description: The present study aimed to investigate the effects of degraded speech perception and binaural unmasking using functional near-infrared spectroscopy (fNIRS). Normal hearing listeners were tested when attending to unprocessed or vocoded speech, presented to the left ear at two speech-to-noise ratios (SNRs). Additionally, by comparing monaural versus diotic masker noise, we measured binaural unmasking. Our primary research question was whether the prefrontal cortex and temporal cortex responded differently to varying listening configurations. Our a priori regions of interest (ROIs) were located at the left dorsolateral prefrontal cortex (DLPFC) and auditory cortex (AC). The left DLPFC has been reported to be involved in attentional processes when listening to degraded speech and in spatial hearing processing, while the AC has been reported to be sensitive to speech intelligibility. Comparisons of cortical activity between these two ROIs revealed significantly different fNIRS response patterns. Further, we showed a significant and positive correlation between self-reported task difficulty levels and fNIRS responses in the DLPFC, with a negative but non-significant correlation for the left AC, suggesting that the two ROIs played different roles in effortful speech perception. Our secondary question was whether activity within three sub-regions of the lateral PFC (LPFC) including the DLPFC was differentially affected by varying speech-noise configurations. We found significant effects of spectral degradation and SNR, and significant differences in fNIRS response amplitudes between the three regions, but no significant interaction between ROI and speech type, or between ROI and SNR. When attending to speech with monaural and diotic noises, participants reported the latter conditions being easier; however, no significant main effect of masker condition on cortical activity was observed. For cortical responses in the LPFC, a significant interaction between SNR and masker condition was observed. These findings suggest that binaural unmasking affects cortical activity through improving speech reception threshold in noise, rather than by reducing effort exerted.
Publisher: United States: Public Library of Science
Language: English
Identifier: ISSN: 1932-6203
EISSN: 1932-6203
DOI: 10.1371/journal.pone.0267588
PMID: 35468160
Source: Public Library of Science (PLoS) Journals Open Access
Geneva Foundation Free Medical Journals at publisher websites
MEDLINE
PubMed Central
Directory of Open Access Journals
ProQuest Central

Back to results list


INSPIRE LIBRARY - TON DUC THANG UNIVERSITY	(84-028) 37 755 057	Feedback
19 Nguyen Huu Tho St. Dist.7, HCM	thuvien@tdtu.edu.vn	Feedback

Effects of degraded speech processing and binaural unmasking investigated using functional near-infrared spectroscopy (fNIRS)

Searching Remote Databases, Please Wait