Annular and spiral bubble nets: A simulation-focused analysis of humpback whale feeding strategies
Humpback whales can generate bubbly regions (called bubble nets) via their blowholes, which they appear to exploit via loud vocalizations for feeding purposes. We model this phenomenon as the acoustic excitation of an dilute bubble net of radially varying void fraction. A fully coupled phase-averagi...
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ftcaltechauth:oai:authors.library.caltech.edu:tyze9-akd64 2024-06-23T07:53:36+00:00 Annular and spiral bubble nets: A simulation-focused analysis of humpback whale feeding strategies Bryngelson, Spencer H. Colonius, Tim 2019-10 https://doi.org/10.1121/1.5136599 unknown Acoustical Society of America https://doi.org/10.1121/1.5136599 oai:authors.library.caltech.edu:tyze9-akd64 eprintid:99928 resolverid:CaltechAUTHORS:20191119-101701319 info:eu-repo/semantics/closedAccess Other Journal of the Acoustical Society of America, 146(4), 2771, (2019-10) info:eu-repo/semantics/article 2019 ftcaltechauth https://doi.org/10.1121/1.5136599 2024-06-12T05:01:54Z Humpback whales can generate bubbly regions (called bubble nets) via their blowholes, which they appear to exploit via loud vocalizations for feeding purposes. We model this phenomenon as the acoustic excitation of an dilute bubble net of radially varying void fraction. A fully coupled phase-averaging approach is used to compute the bubble response and corresponding acoustics. We first assess the possibility of a sophisticated wave-guidance behavior of high-frequency whale vocalizations within the bubble net. For a small range of flow parameters, the reflections associated with the bubbly region result in an observable wave-guidance behavior, though even then these reflections disperse rapidly. In light of this, we also consider multiple whales surrounding the bubble net, each vocalizing towards its center. We show that for physically realistic configurations, including variations in the bubble net void fraction and number of whales, the bubble net can keep its core region substantially quieter than the exterior. Finally, we investigate the ability of spiral, rather than annular, geometries for keeping the bubble-free region quiet. © 2019 Acoustical Society of America. Published Online: 13 November 2019. Article in Journal/Newspaper Humpback Whale Caltech Authors (California Institute of Technology) The Journal of the Acoustical Society of America 146 4_Supplement 2771 2771 |
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Caltech Authors (California Institute of Technology) |
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description |
Humpback whales can generate bubbly regions (called bubble nets) via their blowholes, which they appear to exploit via loud vocalizations for feeding purposes. We model this phenomenon as the acoustic excitation of an dilute bubble net of radially varying void fraction. A fully coupled phase-averaging approach is used to compute the bubble response and corresponding acoustics. We first assess the possibility of a sophisticated wave-guidance behavior of high-frequency whale vocalizations within the bubble net. For a small range of flow parameters, the reflections associated with the bubbly region result in an observable wave-guidance behavior, though even then these reflections disperse rapidly. In light of this, we also consider multiple whales surrounding the bubble net, each vocalizing towards its center. We show that for physically realistic configurations, including variations in the bubble net void fraction and number of whales, the bubble net can keep its core region substantially quieter than the exterior. Finally, we investigate the ability of spiral, rather than annular, geometries for keeping the bubble-free region quiet. © 2019 Acoustical Society of America. Published Online: 13 November 2019. |
format |
Article in Journal/Newspaper |
author |
Bryngelson, Spencer H. Colonius, Tim |
spellingShingle |
Bryngelson, Spencer H. Colonius, Tim Annular and spiral bubble nets: A simulation-focused analysis of humpback whale feeding strategies |
author_facet |
Bryngelson, Spencer H. Colonius, Tim |
author_sort |
Bryngelson, Spencer H. |
title |
Annular and spiral bubble nets: A simulation-focused analysis of humpback whale feeding strategies |
title_short |
Annular and spiral bubble nets: A simulation-focused analysis of humpback whale feeding strategies |
title_full |
Annular and spiral bubble nets: A simulation-focused analysis of humpback whale feeding strategies |
title_fullStr |
Annular and spiral bubble nets: A simulation-focused analysis of humpback whale feeding strategies |
title_full_unstemmed |
Annular and spiral bubble nets: A simulation-focused analysis of humpback whale feeding strategies |
title_sort |
annular and spiral bubble nets: a simulation-focused analysis of humpback whale feeding strategies |
publisher |
Acoustical Society of America |
publishDate |
2019 |
url |
https://doi.org/10.1121/1.5136599 |
genre |
Humpback Whale |
genre_facet |
Humpback Whale |
op_source |
Journal of the Acoustical Society of America, 146(4), 2771, (2019-10) |
op_relation |
https://doi.org/10.1121/1.5136599 oai:authors.library.caltech.edu:tyze9-akd64 eprintid:99928 resolverid:CaltechAUTHORS:20191119-101701319 |
op_rights |
info:eu-repo/semantics/closedAccess Other |
op_doi |
https://doi.org/10.1121/1.5136599 |
container_title |
The Journal of the Acoustical Society of America |
container_volume |
146 |
container_issue |
4_Supplement |
container_start_page |
2771 |
op_container_end_page |
2771 |
_version_ |
1802645328147513344 |