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Analysis of the Acoustic Transcranial Bone Conduction
Objectives: (1) To analyze the preferential pathways of sound transmission and sound waves travelling properties in the skull and (2) to identify the location(s) on the skull where bone conduction to the cochlea is optimal. Study design: Basic research Methods: Nine cadaveric heads were placed in an...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2022
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9025267/ https://www.ncbi.nlm.nih.gov/pubmed/35447739 http://dx.doi.org/10.3390/audiolres12020019 |
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author | Dufour-Fournier, Catherine Devèze, Arnaud Barbut, Jonathan Ogam, Erick Saliba, Issam Masson, Catherine |
author_facet | Dufour-Fournier, Catherine Devèze, Arnaud Barbut, Jonathan Ogam, Erick Saliba, Issam Masson, Catherine |
author_sort | Dufour-Fournier, Catherine |
collection | PubMed |
description | Objectives: (1) To analyze the preferential pathways of sound transmission and sound waves travelling properties in the skull and (2) to identify the location(s) on the skull where bone conduction to the cochlea is optimal. Study design: Basic research Methods: Nine cadaveric heads were placed in an anechoic chamber and equipped with six Bone Anchored Hearing Aids (BAHA™) implants (Cochlear™, Sydney, NSW, Australia) and fifteen accelerometers. A laser velocimeter was used to measure cochlear response by placing a reflector on the round window. Different frequency sweeps were applied to each implant, and measurements were recorded simultaneously by the laser velocimeter and accelerometers. Results: Low-frequency sound waves mostly travel the frontal transmission pathways, and there is no clear predominant pattern for the high frequencies. The mean inter-aural time lag is 0.1 ms. Optimal sound transmission to the cochlea occurs between 1000 and 2500 Hz with a contralateral 5 to 10 dB attenuation. The implant location does not influence mean transmission to the cochlea. Conclusion: There is a pattern of transmission for low frequencies through a frontal pathway but none for high frequencies. We were also able to demonstrate that the localization of the BAHA™ implant on the skull had no significant impact on the sound transmission, either ipsi or contralaterally. |
format | Online Article Text |
id | pubmed-9025267 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-90252672022-04-23 Analysis of the Acoustic Transcranial Bone Conduction Dufour-Fournier, Catherine Devèze, Arnaud Barbut, Jonathan Ogam, Erick Saliba, Issam Masson, Catherine Audiol Res Article Objectives: (1) To analyze the preferential pathways of sound transmission and sound waves travelling properties in the skull and (2) to identify the location(s) on the skull where bone conduction to the cochlea is optimal. Study design: Basic research Methods: Nine cadaveric heads were placed in an anechoic chamber and equipped with six Bone Anchored Hearing Aids (BAHA™) implants (Cochlear™, Sydney, NSW, Australia) and fifteen accelerometers. A laser velocimeter was used to measure cochlear response by placing a reflector on the round window. Different frequency sweeps were applied to each implant, and measurements were recorded simultaneously by the laser velocimeter and accelerometers. Results: Low-frequency sound waves mostly travel the frontal transmission pathways, and there is no clear predominant pattern for the high frequencies. The mean inter-aural time lag is 0.1 ms. Optimal sound transmission to the cochlea occurs between 1000 and 2500 Hz with a contralateral 5 to 10 dB attenuation. The implant location does not influence mean transmission to the cochlea. Conclusion: There is a pattern of transmission for low frequencies through a frontal pathway but none for high frequencies. We were also able to demonstrate that the localization of the BAHA™ implant on the skull had no significant impact on the sound transmission, either ipsi or contralaterally. MDPI 2022-03-26 /pmc/articles/PMC9025267/ /pubmed/35447739 http://dx.doi.org/10.3390/audiolres12020019 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Dufour-Fournier, Catherine Devèze, Arnaud Barbut, Jonathan Ogam, Erick Saliba, Issam Masson, Catherine Analysis of the Acoustic Transcranial Bone Conduction |
title | Analysis of the Acoustic Transcranial Bone Conduction |
title_full | Analysis of the Acoustic Transcranial Bone Conduction |
title_fullStr | Analysis of the Acoustic Transcranial Bone Conduction |
title_full_unstemmed | Analysis of the Acoustic Transcranial Bone Conduction |
title_short | Analysis of the Acoustic Transcranial Bone Conduction |
title_sort | analysis of the acoustic transcranial bone conduction |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9025267/ https://www.ncbi.nlm.nih.gov/pubmed/35447739 http://dx.doi.org/10.3390/audiolres12020019 |
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