Wave-based active control for nonreciprocal sound transmission and absorption
Wave-based active control for nonreciprocal sound transmission and absorption
Recent interest has arisen in the realisation of nonreciprocal acoustic devices that achieve unidirectional sound transmission. In other words, these devices allow perfect transmission from waves travelling in one direction, whilst blocking waves travelling in the opposite direction. These devices have thus been described as the acoustic analogue of an electrical diode and could be useful in many applications. There are a variety of passive and active devices that have been designed based on the concept of acoustic metamaterials to achieve unidirectional transmission by introducing non-linearities or breaking spatial and temporal symmetries. This paper will investigate how unidirectional transmission can be achieved using active control within a one-dimensional duct. The proposed active control system has the capability to manipulate either the positive or negative travelling waves within the duct in order to achieve zero transmission in one direction, whilst allowing perfect transmission in the opposite direction. The advantage of this system is not only its capability to achieve nonreciprocal sound transmission, but it is also fully adaptable.
Nonreciprocal transmission, active noise control
Tan, Joe
b740c9b2-e880-4e20-92ba-febaa7f688a1
Cheer, Jordan
8e452f50-4c7d-4d4e-913a-34015e99b9dc
Daley, Stephen
53cef7f1-77fa-4a4c-9745-b6a0ba4f42e6
14 July 2021
Tan, Joe
b740c9b2-e880-4e20-92ba-febaa7f688a1
Cheer, Jordan
8e452f50-4c7d-4d4e-913a-34015e99b9dc
Daley, Stephen
53cef7f1-77fa-4a4c-9745-b6a0ba4f42e6
Tan, Joe, Cheer, Jordan and Daley, Stephen
(2021)
Wave-based active control for nonreciprocal sound transmission and absorption.
27th International Conference on Sound and Vibration.
11 - 16 Jul 2021.
8 pp
.
Record type:
Conference or Workshop Item
(Paper)
Abstract
Recent interest has arisen in the realisation of nonreciprocal acoustic devices that achieve unidirectional sound transmission. In other words, these devices allow perfect transmission from waves travelling in one direction, whilst blocking waves travelling in the opposite direction. These devices have thus been described as the acoustic analogue of an electrical diode and could be useful in many applications. There are a variety of passive and active devices that have been designed based on the concept of acoustic metamaterials to achieve unidirectional transmission by introducing non-linearities or breaking spatial and temporal symmetries. This paper will investigate how unidirectional transmission can be achieved using active control within a one-dimensional duct. The proposed active control system has the capability to manipulate either the positive or negative travelling waves within the duct in order to achieve zero transmission in one direction, whilst allowing perfect transmission in the opposite direction. The advantage of this system is not only its capability to achieve nonreciprocal sound transmission, but it is also fully adaptable.
Text
ICSV_2021_conference_paper
More information
Published date: 14 July 2021
Additional Information:
Publisher Copyright:
© "Advances in Acoustics, Noise and Vibration - 2021" Proceedings of the 27th International Congress on Sound and Vibration, ICSV 2021. All rights reserved.
Venue - Dates:
27th International Conference on Sound and Vibration, 2021-07-11 - 2021-07-16
Keywords:
Nonreciprocal transmission, active noise control
Identifiers
Local EPrints ID: 450491
URI: http://eprints.soton.ac.uk/id/eprint/450491
PURE UUID: e9c70fbb-7a0f-4aaa-ae94-e48e0141b489
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Date deposited: 30 Jul 2021 16:30
Last modified: 17 Mar 2024 03:23
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