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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crplos:10.1371/journal.pone.0288119 2024-05-19T07:40:14+00:00 Resonance of the tympanoperiotic complex of fin whales with implications for their low frequency hearing Morris, Margaret Krysl, Petr Hildebrand, John Cranford, Ted Kanawjia, Preeti Office of Naval Research 2023 http://dx.doi.org/10.1371/journal.pone.0288119 https://dx.plos.org/10.1371/journal.pone.0288119 en eng Public Library of Science (PLoS) http://creativecommons.org/licenses/by/4.0/ PLOS ONE volume 18, issue 10, page e0288119 ISSN 1932-6203 journal-article 2023 crplos https://doi.org/10.1371/journal.pone.0288119 2024-05-01T06:56:34Z 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 PLOS PLOS ONE 18 10 e0288119 |
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PLOS |
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crplos |
language |
English |
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. |
author2 |
Kanawjia, Preeti Office of Naval Research |
format |
Article in Journal/Newspaper |
author |
Morris, Margaret Krysl, Petr Hildebrand, John Cranford, Ted |
spellingShingle |
Morris, Margaret Krysl, Petr Hildebrand, John Cranford, Ted Resonance of the tympanoperiotic complex of fin whales with implications for their low frequency hearing |
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 (PLoS) |
publishDate |
2023 |
url |
http://dx.doi.org/10.1371/journal.pone.0288119 https://dx.plos.org/10.1371/journal.pone.0288119 |
genre |
Fin whale |
genre_facet |
Fin whale |
op_source |
PLOS ONE volume 18, issue 10, page e0288119 ISSN 1932-6203 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
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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1799479808343670784 |