An Influence of Directional Microphones on the Speech Intelligibility and Spatial Perception by Cochlear Implant Users
The objective of the study is to assess the hearing performance of cochlear implant users in three device microphone configurations: omni-directional, directional, and beamformer (BEAMformer two-adaptive noise reduction system), in localization and speech perception tasks in dynamically changing lis...
Saved in:
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Institute of Fundamental Technological Research Polish Academy of Sciences
2015-03-01
|
| Series: | Archives of Acoustics |
| Subjects: | |
| Online Access: | https://acoustics.ippt.pan.pl/index.php/aa/article/view/735 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1850104499843104768 |
|---|---|
| author | Monika KORDUS Richard S. TYLER Jan ŻERA Jacob J. OLESON |
| author_facet | Monika KORDUS Richard S. TYLER Jan ŻERA Jacob J. OLESON |
| author_sort | Monika KORDUS |
| collection | DOAJ |
| description | The objective of the study is to assess the hearing performance of cochlear implant users in three device microphone configurations: omni-directional, directional, and beamformer (BEAMformer two-adaptive noise reduction system), in localization and speech perception tasks in dynamically changing listening environments. Seven cochlear implant users aided with Cochlear CM-24 devices with Freedom speech processor participated in the study. For the localization test in quiet and in background noise, subjects demonstrated significant differences between different microphone settings. Confusion matrices showed that in about 70% cases cochlear implant subjects correctly localized sounds within a horizontal angle of 30–40◦ (±1◦ loudspeaker apart from signal source). However localization in noise was less accurate as shown by a large number of considerable errors in localization in the confusion matrices. Average results indicated no significant difference between three microphone configurations. For speech presented from the front 3 dB SNR improvements in speech intelligibility in three subjects can be observed for beamforming system compared to directional and omni-directional microphone settings. The benefits of using different microphone settings in cochlear implant devices in dynamically changing listening conditions depend on the particular sound environment. |
| format | Article |
| id | doaj-art-c53503d78a0d45ceb0b8b441acb4b86c |
| institution | DOAJ |
| issn | 0137-5075 2300-262X |
| language | English |
| publishDate | 2015-03-01 |
| publisher | Institute of Fundamental Technological Research Polish Academy of Sciences |
| record_format | Article |
| series | Archives of Acoustics |
| spelling | doaj-art-c53503d78a0d45ceb0b8b441acb4b86c2025-08-20T02:39:19ZengInstitute of Fundamental Technological Research Polish Academy of SciencesArchives of Acoustics0137-50752300-262X2015-03-0140110.1515/aoa-2015-0010An Influence of Directional Microphones on the Speech Intelligibility and Spatial Perception by Cochlear Implant UsersMonika KORDUS0Richard S. TYLER1Jan ŻERA2Jacob J. OLESON3Poznan University of Medical Science, Department of Biophysics, Fredry St.10, 61-701 Poznan, PolandUniversity of Iowa Hospital & Clinics, Department of Otolaryngology—Head and Neck Surgery 21151 Pomerantz Family Pavilion 200 Hawkins Drive Iowa City, IA 52242-1089Warsaw University of Technology, Faculty of Electronics and Information Technology, Nowowiejska 15/19, 00-665 Warsaw, PolandDepartment of Biostatistics, 200 Hawkins Drive, C22 GH, The University of Iowa, Iowa City, Iowa, 52242 1009, USAThe objective of the study is to assess the hearing performance of cochlear implant users in three device microphone configurations: omni-directional, directional, and beamformer (BEAMformer two-adaptive noise reduction system), in localization and speech perception tasks in dynamically changing listening environments. Seven cochlear implant users aided with Cochlear CM-24 devices with Freedom speech processor participated in the study. For the localization test in quiet and in background noise, subjects demonstrated significant differences between different microphone settings. Confusion matrices showed that in about 70% cases cochlear implant subjects correctly localized sounds within a horizontal angle of 30–40◦ (±1◦ loudspeaker apart from signal source). However localization in noise was less accurate as shown by a large number of considerable errors in localization in the confusion matrices. Average results indicated no significant difference between three microphone configurations. For speech presented from the front 3 dB SNR improvements in speech intelligibility in three subjects can be observed for beamforming system compared to directional and omni-directional microphone settings. The benefits of using different microphone settings in cochlear implant devices in dynamically changing listening conditions depend on the particular sound environment.https://acoustics.ippt.pan.pl/index.php/aa/article/view/735LocalizationBilateral cochlear implantsAdultsMicrophoneBeamformer |
| spellingShingle | Monika KORDUS Richard S. TYLER Jan ŻERA Jacob J. OLESON An Influence of Directional Microphones on the Speech Intelligibility and Spatial Perception by Cochlear Implant Users Archives of Acoustics Localization Bilateral cochlear implants Adults Microphone Beamformer |
| title | An Influence of Directional Microphones on the Speech Intelligibility and Spatial Perception by Cochlear Implant Users |
| title_full | An Influence of Directional Microphones on the Speech Intelligibility and Spatial Perception by Cochlear Implant Users |
| title_fullStr | An Influence of Directional Microphones on the Speech Intelligibility and Spatial Perception by Cochlear Implant Users |
| title_full_unstemmed | An Influence of Directional Microphones on the Speech Intelligibility and Spatial Perception by Cochlear Implant Users |
| title_short | An Influence of Directional Microphones on the Speech Intelligibility and Spatial Perception by Cochlear Implant Users |
| title_sort | influence of directional microphones on the speech intelligibility and spatial perception by cochlear implant users |
| topic | Localization Bilateral cochlear implants Adults Microphone Beamformer |
| url | https://acoustics.ippt.pan.pl/index.php/aa/article/view/735 |
| work_keys_str_mv | AT monikakordus aninfluenceofdirectionalmicrophonesonthespeechintelligibilityandspatialperceptionbycochlearimplantusers AT richardstyler aninfluenceofdirectionalmicrophonesonthespeechintelligibilityandspatialperceptionbycochlearimplantusers AT janzera aninfluenceofdirectionalmicrophonesonthespeechintelligibilityandspatialperceptionbycochlearimplantusers AT jacobjoleson aninfluenceofdirectionalmicrophonesonthespeechintelligibilityandspatialperceptionbycochlearimplantusers AT monikakordus influenceofdirectionalmicrophonesonthespeechintelligibilityandspatialperceptionbycochlearimplantusers AT richardstyler influenceofdirectionalmicrophonesonthespeechintelligibilityandspatialperceptionbycochlearimplantusers AT janzera influenceofdirectionalmicrophonesonthespeechintelligibilityandspatialperceptionbycochlearimplantusers AT jacobjoleson influenceofdirectionalmicrophonesonthespeechintelligibilityandspatialperceptionbycochlearimplantusers |