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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ftpubmed:oai:pubmedcentral.nih.gov:10566675 2023-11-12T04:17:05+01:00 Resonance of the tympanoperiotic complex of fin whales with implications for their low frequency hearing Morris, Margaret Krysl, Petr Hildebrand, John Cranford, Ted 2023-10-11 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10566675/ http://www.ncbi.nlm.nih.gov/pubmed/37819911 https://doi.org/10.1371/journal.pone.0288119 en eng Public Library of Science http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10566675/ http://www.ncbi.nlm.nih.gov/pubmed/37819911 http://dx.doi.org/10.1371/journal.pone.0288119 © 2023 Morris et al https://creativecommons.org/licenses/by/4.0/This is an open access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. PLoS One Research Article Text 2023 ftpubmed https://doi.org/10.1371/journal.pone.0288119 2023-10-15T01:06:15Z 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. Text Fin whale PubMed Central (PMC) PLOS ONE 18 10 e0288119 |
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Research Article Morris, Margaret Krysl, Petr Hildebrand, John Cranford, Ted Resonance of the tympanoperiotic complex of fin whales with implications for their low frequency hearing |
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Research Article |
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 |
Text |
author |
Morris, Margaret Krysl, Petr Hildebrand, John Cranford, Ted |
author_facet |
Morris, Margaret Krysl, Petr Hildebrand, John Cranford, Ted |
author_sort |
Morris, Margaret |
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 |
publishDate |
2023 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10566675/ http://www.ncbi.nlm.nih.gov/pubmed/37819911 https://doi.org/10.1371/journal.pone.0288119 |
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Fin whale |
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Fin whale |
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PLoS One |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10566675/ http://www.ncbi.nlm.nih.gov/pubmed/37819911 http://dx.doi.org/10.1371/journal.pone.0288119 |
op_rights |
© 2023 Morris et al https://creativecommons.org/licenses/by/4.0/This is an open access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. |
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https://doi.org/10.1371/journal.pone.0288119 |
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