Resonance of the tympanoperiotic complex of fin whales with implications for their low frequency hearing.
The tympanoperiotic complex (TPC) bones of the fin whale skull were studied using experimental measurements and simulation modeling to provide insight into the low frequency hearing of these animals. The study focused on measuring the sounds emitted by the left and right TPC bones when the bones wer...
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ftdoajarticles:oai:doaj.org/article:62a77ab76f734c749aad6e91a6fed6ed 2024-02-27T08:40:27+00:00 Resonance of the tympanoperiotic complex of fin whales with implications for their low frequency hearing. Margaret Morris Petr Krysl John Hildebrand Ted Cranford 2023-01-01T00:00:00Z https://doi.org/10.1371/journal.pone.0288119 https://doaj.org/article/62a77ab76f734c749aad6e91a6fed6ed EN eng Public Library of Science (PLoS) https://doi.org/10.1371/journal.pone.0288119 https://doaj.org/toc/1932-6203 1932-6203 doi:10.1371/journal.pone.0288119 https://doaj.org/article/62a77ab76f734c749aad6e91a6fed6ed PLoS ONE, Vol 18, Iss 10, p e0288119 (2023) Medicine R Science Q article 2023 ftdoajarticles https://doi.org/10.1371/journal.pone.0288119 2024-01-28T02:21:49Z The tympanoperiotic complex (TPC) bones of the fin whale skull were studied using experimental measurements and simulation modeling to provide insight into the low frequency hearing of these animals. The study focused on measuring the sounds emitted by the left and right TPC bones when the bones were tapped at designated locations. Radiated sound was recorded by eight microphones arranged around the tympanic bulla. A finite element model was also created to simulate the natural mode vibrations of the TPC and ossicular chain, using a 3D mesh generated from a CT scan. The simulations produced mode shapes and frequencies for various Young's modulus and density values. The recorded sound amplitudes were compared with the normal component of the simulated displacement and it was found that the modes identified in the experiment most closely resembled those found with Young's modulus for stiff and flexible bone set to 25 and 5 GPa, respectively. The first twelve modes of vibration of the TPC had resonance frequencies between 100Hz and 6kHz. Many vibrational modes focused energy at the sigmoidal process, and therefore the ossicular chain. The resonance frequencies of the left and right TPC were offset, suggesting a mechanism for the animals to have improved hearing at a range of frequencies as well as a mechanism for directionality in their perception of sounds. Article in Journal/Newspaper Fin whale Directory of Open Access Journals: DOAJ Articles PLOS ONE 18 10 e0288119 |
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Open Polar |
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Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Medicine R Science Q |
spellingShingle |
Medicine R Science Q Margaret Morris Petr Krysl John Hildebrand Ted Cranford Resonance of the tympanoperiotic complex of fin whales with implications for their low frequency hearing. |
topic_facet |
Medicine R Science Q |
description |
The tympanoperiotic complex (TPC) bones of the fin whale skull were studied using experimental measurements and simulation modeling to provide insight into the low frequency hearing of these animals. The study focused on measuring the sounds emitted by the left and right TPC bones when the bones were tapped at designated locations. Radiated sound was recorded by eight microphones arranged around the tympanic bulla. A finite element model was also created to simulate the natural mode vibrations of the TPC and ossicular chain, using a 3D mesh generated from a CT scan. The simulations produced mode shapes and frequencies for various Young's modulus and density values. The recorded sound amplitudes were compared with the normal component of the simulated displacement and it was found that the modes identified in the experiment most closely resembled those found with Young's modulus for stiff and flexible bone set to 25 and 5 GPa, respectively. The first twelve modes of vibration of the TPC had resonance frequencies between 100Hz and 6kHz. Many vibrational modes focused energy at the sigmoidal process, and therefore the ossicular chain. The resonance frequencies of the left and right TPC were offset, suggesting a mechanism for the animals to have improved hearing at a range of frequencies as well as a mechanism for directionality in their perception of sounds. |
format |
Article in Journal/Newspaper |
author |
Margaret Morris Petr Krysl John Hildebrand Ted Cranford |
author_facet |
Margaret Morris Petr Krysl John Hildebrand Ted Cranford |
author_sort |
Margaret Morris |
title |
Resonance of the tympanoperiotic complex of fin whales with implications for their low frequency hearing. |
title_short |
Resonance of the tympanoperiotic complex of fin whales with implications for their low frequency hearing. |
title_full |
Resonance of the tympanoperiotic complex of fin whales with implications for their low frequency hearing. |
title_fullStr |
Resonance of the tympanoperiotic complex of fin whales with implications for their low frequency hearing. |
title_full_unstemmed |
Resonance of the tympanoperiotic complex of fin whales with implications for their low frequency hearing. |
title_sort |
resonance of the tympanoperiotic complex of fin whales with implications for their low frequency hearing. |
publisher |
Public Library of Science (PLoS) |
publishDate |
2023 |
url |
https://doi.org/10.1371/journal.pone.0288119 https://doaj.org/article/62a77ab76f734c749aad6e91a6fed6ed |
genre |
Fin whale |
genre_facet |
Fin whale |
op_source |
PLoS ONE, Vol 18, Iss 10, p e0288119 (2023) |
op_relation |
https://doi.org/10.1371/journal.pone.0288119 https://doaj.org/toc/1932-6203 1932-6203 doi:10.1371/journal.pone.0288119 https://doaj.org/article/62a77ab76f734c749aad6e91a6fed6ed |
op_doi |
https://doi.org/10.1371/journal.pone.0288119 |
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PLOS ONE |
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18 |
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10 |
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e0288119 |
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