Measurement and Analysis of Feedback and Nonlinearities for the Codacs Direct Acoustic Cochlear Implant
Acoustic feedback is a very common problem in hearing instruments. Not only does it occur in common behind-the-ear or in-the-ear hearing aids, it also affects bone conduction implants, middle ear implants, and more recent devices, such as the direct acoustic cochlear implant (DACI). In this paper, w...
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| Format: | Article |
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IEEE
2017-01-01
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| Series: | IEEE Access |
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| Online Access: | https://ieeexplore.ieee.org/document/7926368/ |
| _version_ | 1828929141254127616 |
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| author | Giuliano Bernardi Toon Van Waterschoot Marc Moonen Jan Wouters Martin Hillbratt Nicolas Verhaert |
| author_facet | Giuliano Bernardi Toon Van Waterschoot Marc Moonen Jan Wouters Martin Hillbratt Nicolas Verhaert |
| author_sort | Giuliano Bernardi |
| collection | DOAJ |
| description | Acoustic feedback is a very common problem in hearing instruments. Not only does it occur in common behind-the-ear or in-the-ear hearing aids, it also affects bone conduction implants, middle ear implants, and more recent devices, such as the direct acoustic cochlear implant (DACI). In this paper, we present the data and analysis relating to the feedback path characterization of the Cochlear™ Codacs™ DACI, performed on fresh frozen cadaver heads in four different measurement sessions. The general objectives were the following: 1) To measure and analyze the feedback path of the system and check for possible specimen-dependent variabilities; 2) To assess whether this feedback path is affected by an incorrect implantation; 3) To check for nonlinear behavior; and 4) To determine differences between tissular and airborne feedback. The data analysis reveals that the feedback seems to be dependent on the specific head morphology of the implanted specimen, and that an incorrect implantation might strongly affect the feedback path; additionally, the analysis reveals that some nonlinear behavior at high stimulus levels can be expected and, finally, that the feedback path is characterized by a tissular feedback component with a rather different frequency content compared to the airborne feedback component. |
| first_indexed | 2024-12-14T00:13:43Z |
| format | Article |
| id | doaj.art-5f0a43f6d6b748cfae3086f7b080a63c |
| institution | Directory Open Access Journal |
| issn | 2169-3536 |
| language | English |
| last_indexed | 2024-12-14T00:13:43Z |
| publishDate | 2017-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Access |
| spelling | doaj.art-5f0a43f6d6b748cfae3086f7b080a63c2022-12-21T23:25:37ZengIEEEIEEE Access2169-35362017-01-0158702871310.1109/ACCESS.2017.27036357926368Measurement and Analysis of Feedback and Nonlinearities for the Codacs Direct Acoustic Cochlear ImplantGiuliano Bernardi0https://orcid.org/0000-0003-4266-8212Toon Van Waterschoot1Marc Moonen2Jan Wouters3Martin Hillbratt4Nicolas Verhaert5Department of Electrical Engineering, ESAT-STADIUS, Katholieke Universiteit Leuven, Leuven, BelgiumDepartment of Electrical Engineering, ESAT-STADIUS, Katholieke Universiteit Leuven, Leuven, BelgiumDepartment of Electrical Engineering, ESAT-STADIUS, Katholieke Universiteit Leuven, Leuven, BelgiumDepartment of Neurosciences, Lab ExpORL, Katholieke Universiteit Leuven, Leuven, BelgiumMölnlycke Health Care, Lindome, SwedenDepartment of Neurosciences, Lab ExpORL, Katholieke Universiteit Leuven, Leuven, BelgiumAcoustic feedback is a very common problem in hearing instruments. Not only does it occur in common behind-the-ear or in-the-ear hearing aids, it also affects bone conduction implants, middle ear implants, and more recent devices, such as the direct acoustic cochlear implant (DACI). In this paper, we present the data and analysis relating to the feedback path characterization of the Cochlear™ Codacs™ DACI, performed on fresh frozen cadaver heads in four different measurement sessions. The general objectives were the following: 1) To measure and analyze the feedback path of the system and check for possible specimen-dependent variabilities; 2) To assess whether this feedback path is affected by an incorrect implantation; 3) To check for nonlinear behavior; and 4) To determine differences between tissular and airborne feedback. The data analysis reveals that the feedback seems to be dependent on the specific head morphology of the implanted specimen, and that an incorrect implantation might strongly affect the feedback path; additionally, the analysis reveals that some nonlinear behavior at high stimulus levels can be expected and, finally, that the feedback path is characterized by a tissular feedback component with a rather different frequency content compared to the airborne feedback component.https://ieeexplore.ieee.org/document/7926368/Hearing aidsdirect acoustic cochlear implant (DACI)acoustic feedbackimpulse response measurementsnonlinearities |
| spellingShingle | Giuliano Bernardi Toon Van Waterschoot Marc Moonen Jan Wouters Martin Hillbratt Nicolas Verhaert Measurement and Analysis of Feedback and Nonlinearities for the Codacs Direct Acoustic Cochlear Implant IEEE Access Hearing aids direct acoustic cochlear implant (DACI) acoustic feedback impulse response measurements nonlinearities |
| title | Measurement and Analysis of Feedback and Nonlinearities for the Codacs Direct Acoustic Cochlear Implant |
| title_full | Measurement and Analysis of Feedback and Nonlinearities for the Codacs Direct Acoustic Cochlear Implant |
| title_fullStr | Measurement and Analysis of Feedback and Nonlinearities for the Codacs Direct Acoustic Cochlear Implant |
| title_full_unstemmed | Measurement and Analysis of Feedback and Nonlinearities for the Codacs Direct Acoustic Cochlear Implant |
| title_short | Measurement and Analysis of Feedback and Nonlinearities for the Codacs Direct Acoustic Cochlear Implant |
| title_sort | measurement and analysis of feedback and nonlinearities for the codacs direct acoustic cochlear implant |
| topic | Hearing aids direct acoustic cochlear implant (DACI) acoustic feedback impulse response measurements nonlinearities |
| url | https://ieeexplore.ieee.org/document/7926368/ |
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