Sound radiation from a plate with embedded active acoustic black holes
Sound radiation from a plate with embedded active acoustic black holes
Acoustic Black Holes (ABHs) can be realised as tapered structural features that focus and absorb vibrational energy. In a plate, the damping e ect of ABHs can be used to reduce the radiation efficiency, particularly above the critical frequency of the plate. However, at lower frequencies, there is still significant radiation due to the low order modes of the plate. It has previously been shown that the combination of active control and ABHs can result in an e ective broadband control solution with lower computational and power requirements compared to a standalone active configuration. This paper presents an investigation into how two di erent active control strategies a ect structural response and radiated sound power of a plate with active ABHs (AABHs). It is shown, through an active vibration control strategy and an active noise control strategy, that the AABHs can be used to successfully control either the global structural response of the plate or the radiated sound power. However, it is also shown that controlling either response can lead to an enhancement in the other.
Hook, Kristian E
6c9b8a1f-84fe-4560-9138-89cf5e8f4c4b
Cheer, Jordan
8e452f50-4c7d-4d4e-913a-34015e99b9dc
Daley, Stephen
53cef7f1-77fa-4a4c-9745-b6a0ba4f42e6
21 August 2022
Hook, Kristian E
6c9b8a1f-84fe-4560-9138-89cf5e8f4c4b
Cheer, Jordan
8e452f50-4c7d-4d4e-913a-34015e99b9dc
Daley, Stephen
53cef7f1-77fa-4a4c-9745-b6a0ba4f42e6
Hook, Kristian E, Cheer, Jordan and Daley, Stephen
(2022)
Sound radiation from a plate with embedded active acoustic black holes.
In Proceedings of InterNoise 2022.
8 pp
.
Record type:
Conference or Workshop Item
(Paper)
Abstract
Acoustic Black Holes (ABHs) can be realised as tapered structural features that focus and absorb vibrational energy. In a plate, the damping e ect of ABHs can be used to reduce the radiation efficiency, particularly above the critical frequency of the plate. However, at lower frequencies, there is still significant radiation due to the low order modes of the plate. It has previously been shown that the combination of active control and ABHs can result in an e ective broadband control solution with lower computational and power requirements compared to a standalone active configuration. This paper presents an investigation into how two di erent active control strategies a ect structural response and radiated sound power of a plate with active ABHs (AABHs). It is shown, through an active vibration control strategy and an active noise control strategy, that the AABHs can be used to successfully control either the global structural response of the plate or the radiated sound power. However, it is also shown that controlling either response can lead to an enhancement in the other.
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AABH_Plate_Radiation_Paper
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Published date: 21 August 2022
Venue - Dates:
Inter Noise 2022, Scottish Event Campus, Glasgow, United Kingdom, 2022-08-21 - 2022-08-24
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Local EPrints ID: 470906
URI: http://eprints.soton.ac.uk/id/eprint/470906
PURE UUID: d6ba0eb1-cfc1-4933-969c-0fbe037163d5
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Date deposited: 20 Oct 2022 16:52
Last modified: 24 Apr 2024 01:44
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Author:
Kristian E Hook
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