Pinna-Imitating Microphone Directionality Improves Sound Localization and Discrimination in Bilateral Cochlear Implant Users.
Journal
Ear and hearing
ISSN: 1538-4667
Titre abrégé: Ear Hear
Pays: United States
ID NLM: 8005585
Informations de publication
Date de publication:
Historique:
pubmed:
24
7
2020
medline:
29
7
2021
entrez:
24
7
2020
Statut:
ppublish
Résumé
To compare the sound-source localization, discrimination, and tracking performance of bilateral cochlear implant users with omnidirectional (OMNI) and pinna-imitating (PI) microphone directionality modes. Twelve experienced bilateral cochlear implant users participated in the study. Their audio processors were fitted with two different programs featuring either the OMNI or PI mode. Each subject performed static and dynamic sound field spatial hearing tests in the horizontal plane. The static tests consisted of an absolute sound localization test and a minimum audible angle test, which was measured at eight azimuth directions. Dynamic sound tracking ability was evaluated by the subject correctly indicating the direction of a moving stimulus along two circular paths around the subject. PI mode led to statistically significant sound localization and discrimination improvements. For static sound localization, the greatest benefit was a reduction in the number of front-back confusions. The front-back confusion rate was reduced from 47% with OMNI mode to 35% with PI mode (p = 0.03). The ability to discriminate sound sources straight to the sides (90° and 270° angle) was only possible with PI mode. The averaged minimum audible angle value for the 90° and 270° angle positions decreased from a 75.5° to a 37.7° angle when PI mode was used (p < 0.001). Furthermore, a non-significant trend towards an improvement in the ability to track moving sound sources was observed for both trajectories tested (p = 0.34 and p = 0.27). Our results demonstrate that PI mode can lead to improved spatial hearing performance in bilateral cochlear implant users, mainly as a consequence of improved front-back discrimination with PI mode.
Identifiants
pubmed: 32701730
pii: 00003446-202101000-00019
doi: 10.1097/AUD.0000000000000912
pmc: PMC7757747
doi:
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
214-222Informations de copyright
Copyright © 2020 The Authors. Ear & Hearing is published on behalf of the American Auditory Society, by Wolters Kluwer Health, Inc.
Déclaration de conflit d'intérêts
The authors have no conflicts of interest to disclose.
Références
Otol Neurotol. 2011 Jan;32(1):1-6
pubmed: 21131889
Int J Audiol. 2006 Oct;45(10):563-79
pubmed: 17062498
J Acoust Soc Am. 2019 Apr;145(4):2498
pubmed: 31046310
PLoS One. 2018 Jan 5;13(1):e0190718
pubmed: 29304186
Ear Hear. 2004 Jun;25(3):205-14
pubmed: 15179112
J Acoust Soc Am. 2012 Jun;131(6):4732-42
pubmed: 22712946
J Acoust Soc Am. 2019 Mar;145(3):1389
pubmed: 31067937
J Neurosci. 2005 Jun 1;25(22):5413-24
pubmed: 15930391
J Acoust Soc Am. 1983 Nov;74(5):1380-91
pubmed: 6643850
Int J Audiol. 2011 Mar;50(3):164-76
pubmed: 21208034
Ear Hear. 2018 Nov/Dec;39(6):1224-1231
pubmed: 29664750
J Acoust Soc Am. 2010 Mar;127(3):EL87-92
pubmed: 20329812
Audiol Neurootol. 2005 Nov-Dec;10(6):342-52
pubmed: 16103645
Trends Amplif. 2013 Sep-Dec;17(3):171-88
pubmed: 24216771
Behav Res Methods. 2015 Mar;47(1):13-26
pubmed: 24671826
J Neurosci. 2007 Sep 19;27(38):10249-58
pubmed: 17881531
J Speech Lang Hear Res. 2016 Aug 1;59(4):810-8
pubmed: 27411035
Otol Neurotol. 2016 Jan;37(1):19-23
pubmed: 26427637
J Acoust Soc Am. 1990 Dec;88(6):2639-44
pubmed: 2283437
Ear Hear. 2010 Oct;31(5):645-56
pubmed: 20592615
Ear Hear. 2017 May/Jun;38(3):368-373
pubmed: 28166088
J Am Acad Audiol. 2018 Mar;29(3):197-205
pubmed: 29488870
Ear Hear. 2016 Sep-Oct;37(5):e341-5
pubmed: 27054512
Nat Neurosci. 1998 Sep;1(5):417-21
pubmed: 10196533
Ear Hear. 2011 Mar-Apr;32(2):198-208
pubmed: 21052005
Am J Audiol. 2013 Jun;22(1):84-93
pubmed: 23275583