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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2023
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ftcdlib:oai:escholarship.org:ark:/13030/qt7405p94j 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 Kanawjia, Preeti e0288119 2023-01-01 https://escholarship.org/uc/item/7405p94j unknown eScholarship, University of California qt7405p94j https://escholarship.org/uc/item/7405p94j CC-BY PLOS ONE, vol 18, iss 10 Allied Health and Rehabilitation Science Health Sciences Physical Sciences General Science & Technology article 2023 ftcdlib 2023-10-30T19:04:45Z 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 University of California: eScholarship |
institution |
Open Polar |
collection |
University of California: eScholarship |
op_collection_id |
ftcdlib |
language |
unknown |
topic |
Allied Health and Rehabilitation Science Health Sciences Physical Sciences General Science & Technology |
spellingShingle |
Allied Health and Rehabilitation Science Health Sciences Physical Sciences General Science & Technology Morris, Margaret Krysl, Petr Hildebrand, John Cranford, Ted Resonance of the tympanoperiotic complex of fin whales with implications for their low frequency hearing |
topic_facet |
Allied Health and Rehabilitation Science Health Sciences Physical Sciences General Science & Technology |
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 |
format |
Article in Journal/Newspaper |
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 |
eScholarship, University of California |
publishDate |
2023 |
url |
https://escholarship.org/uc/item/7405p94j |
op_coverage |
e0288119 |
genre |
Fin whale |
genre_facet |
Fin whale |
op_source |
PLOS ONE, vol 18, iss 10 |
op_relation |
qt7405p94j https://escholarship.org/uc/item/7405p94j |
op_rights |
CC-BY |
_version_ |
1782334074391625728 |