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Coupling and confinement of current in thermoacoustic phased arrays

When a medium is rapidly heated and cooled, heat transfers to its surroundings as sound. A controllable source of this sound is realized through joule heating of thin, conductive films by an alternating current. Here, we show that arrays of these sources generate sound unique to this mechanism. From...

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Autores principales: Tatnell, David M., Heath, Mark S., Hepplestone, Steven P., Hibbins, Alastair P., Hornett, Samuel M., Horsley, Simon A. R., Horsell, David W.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Association for the Advancement of Science 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7329335/
https://www.ncbi.nlm.nih.gov/pubmed/32656340
http://dx.doi.org/10.1126/sciadv.abb2752
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author Tatnell, David M.
Heath, Mark S.
Hepplestone, Steven P.
Hibbins, Alastair P.
Hornett, Samuel M.
Horsley, Simon A. R.
Horsell, David W.
author_facet Tatnell, David M.
Heath, Mark S.
Hepplestone, Steven P.
Hibbins, Alastair P.
Hornett, Samuel M.
Horsley, Simon A. R.
Horsell, David W.
author_sort Tatnell, David M.
collection PubMed
description When a medium is rapidly heated and cooled, heat transfers to its surroundings as sound. A controllable source of this sound is realized through joule heating of thin, conductive films by an alternating current. Here, we show that arrays of these sources generate sound unique to this mechanism. From the sound alone, we spatially resolve current flow by varying the film geometry and electrical phase. Confinement concentrates heat to such a degree that the film properties become largely irrelevant. Electrical coupling between sources creates its own distinctive sound that depends on the current flow direction, making it unusually sensitive to the interactions of multiple currents sharing the same space. By controlling the flow, a full phased array can be created from just a single film.
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spelling pubmed-73293352020-07-09 Coupling and confinement of current in thermoacoustic phased arrays Tatnell, David M. Heath, Mark S. Hepplestone, Steven P. Hibbins, Alastair P. Hornett, Samuel M. Horsley, Simon A. R. Horsell, David W. Sci Adv Research Articles When a medium is rapidly heated and cooled, heat transfers to its surroundings as sound. A controllable source of this sound is realized through joule heating of thin, conductive films by an alternating current. Here, we show that arrays of these sources generate sound unique to this mechanism. From the sound alone, we spatially resolve current flow by varying the film geometry and electrical phase. Confinement concentrates heat to such a degree that the film properties become largely irrelevant. Electrical coupling between sources creates its own distinctive sound that depends on the current flow direction, making it unusually sensitive to the interactions of multiple currents sharing the same space. By controlling the flow, a full phased array can be created from just a single film. American Association for the Advancement of Science 2020-07-01 /pmc/articles/PMC7329335/ /pubmed/32656340 http://dx.doi.org/10.1126/sciadv.abb2752 Text en Copyright © 2020 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution License 4.0 (CC BY). https://creativecommons.org/licenses/by/4.0/ https://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution license (https://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Research Articles
Tatnell, David M.
Heath, Mark S.
Hepplestone, Steven P.
Hibbins, Alastair P.
Hornett, Samuel M.
Horsley, Simon A. R.
Horsell, David W.
Coupling and confinement of current in thermoacoustic phased arrays
title Coupling and confinement of current in thermoacoustic phased arrays
title_full Coupling and confinement of current in thermoacoustic phased arrays
title_fullStr Coupling and confinement of current in thermoacoustic phased arrays
title_full_unstemmed Coupling and confinement of current in thermoacoustic phased arrays
title_short Coupling and confinement of current in thermoacoustic phased arrays
title_sort coupling and confinement of current in thermoacoustic phased arrays
topic Research Articles
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7329335/
https://www.ncbi.nlm.nih.gov/pubmed/32656340
http://dx.doi.org/10.1126/sciadv.abb2752
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