Reconfigurable sound anomalous absorptions in transparent waveguide with modularized multi-order Helmholtz resonator

Abstract Helmholtz resonators offer an ideal platform for advanced sound absorbers, but their utility has been impeded by inherent frequency range limitations and the lack of function reconfiguration. Here, we introduce a multi-order Helmholtz resonator (MHR) that allows multiple monopolar resonant...

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Autores principales:	Houyou Long, Ying Cheng, Xiaojun Liu
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2018
Materias:	Helmholtz Resonator Transparent Waveguide Soft Boundary Sound Absorbers Asymmetric Absorption Medicine R Science Q
Acceso en línea:	https://doaj.org/article/a6dd67cefce84f8998a385b0712c8829
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spelling	oai:doaj.org-article:a6dd67cefce84f8998a385b0712c88292021-12-02T11:40:53ZReconfigurable sound anomalous absorptions in transparent waveguide with modularized multi-order Helmholtz resonator10.1038/s41598-018-34117-z2045-2322https://doaj.org/article/a6dd67cefce84f8998a385b0712c88292018-10-01T00:00:00Zhttps://doi.org/10.1038/s41598-018-34117-zhttps://doaj.org/toc/2045-2322Abstract Helmholtz resonators offer an ideal platform for advanced sound absorbers, but their utility has been impeded by inherent frequency range limitations and the lack of function reconfiguration. Here, we introduce a multi-order Helmholtz resonator (MHR) that allows multiple monopolar resonant modes theoretically and experimentally. The combination of these modularized MHRs further creates reconfigurable multi-band anomalous absorbers in a two-port transparent waveguide while maintaining undisturbed air ventilation. In asymmetric absorption state through coupling of artificial sound soft boundary with preposed MHR, sound energy is almost totally absorbed in multiple frequency ranges when sound waves are incident from one side while it is largely reflected back from the opposite side. Interestingly, the original asymmetric absorber would turn into symmetric bidirectional absorber if one post MHR concatenates after the soft boundary. Using combination of identical MHRs, we demonstrate function selective asymmetric/symmetric absorber in multi-bands, highlighting the potential to use MHRs in the design of diverse devices for more versatile applications.Houyou LongYing ChengXiaojun LiuNature PortfolioarticleHelmholtz ResonatorTransparent WaveguideSoft BoundarySound AbsorbersAsymmetric AbsorptionMedicineRScienceQENScientific Reports, Vol 8, Iss 1, Pp 1-9 (2018)
institution	DOAJ
collection	DOAJ
language	EN
topic	Helmholtz Resonator Transparent Waveguide Soft Boundary Sound Absorbers Asymmetric Absorption Medicine R Science Q
spellingShingle	Helmholtz Resonator Transparent Waveguide Soft Boundary Sound Absorbers Asymmetric Absorption Medicine R Science Q Houyou Long Ying Cheng Xiaojun Liu Reconfigurable sound anomalous absorptions in transparent waveguide with modularized multi-order Helmholtz resonator
description	Abstract Helmholtz resonators offer an ideal platform for advanced sound absorbers, but their utility has been impeded by inherent frequency range limitations and the lack of function reconfiguration. Here, we introduce a multi-order Helmholtz resonator (MHR) that allows multiple monopolar resonant modes theoretically and experimentally. The combination of these modularized MHRs further creates reconfigurable multi-band anomalous absorbers in a two-port transparent waveguide while maintaining undisturbed air ventilation. In asymmetric absorption state through coupling of artificial sound soft boundary with preposed MHR, sound energy is almost totally absorbed in multiple frequency ranges when sound waves are incident from one side while it is largely reflected back from the opposite side. Interestingly, the original asymmetric absorber would turn into symmetric bidirectional absorber if one post MHR concatenates after the soft boundary. Using combination of identical MHRs, we demonstrate function selective asymmetric/symmetric absorber in multi-bands, highlighting the potential to use MHRs in the design of diverse devices for more versatile applications.
format	article
author	Houyou Long Ying Cheng Xiaojun Liu
author_facet	Houyou Long Ying Cheng Xiaojun Liu
author_sort	Houyou Long
title	Reconfigurable sound anomalous absorptions in transparent waveguide with modularized multi-order Helmholtz resonator
title_short	Reconfigurable sound anomalous absorptions in transparent waveguide with modularized multi-order Helmholtz resonator
title_full	Reconfigurable sound anomalous absorptions in transparent waveguide with modularized multi-order Helmholtz resonator
title_fullStr	Reconfigurable sound anomalous absorptions in transparent waveguide with modularized multi-order Helmholtz resonator
title_full_unstemmed	Reconfigurable sound anomalous absorptions in transparent waveguide with modularized multi-order Helmholtz resonator
title_sort	reconfigurable sound anomalous absorptions in transparent waveguide with modularized multi-order helmholtz resonator
publisher	Nature Portfolio
publishDate	2018
url	https://doaj.org/article/a6dd67cefce84f8998a385b0712c8829
work_keys_str_mv	AT houyoulong reconfigurablesoundanomalousabsorptionsintransparentwaveguidewithmodularizedmultiorderhelmholtzresonator AT yingcheng reconfigurablesoundanomalousabsorptionsintransparentwaveguidewithmodularizedmultiorderhelmholtzresonator AT xiaojunliu reconfigurablesoundanomalousabsorptionsintransparentwaveguidewithmodularizedmultiorderhelmholtzresonator
_version_	1718395537592418304

Reconfigurable sound anomalous absorptions in transparent waveguide with modularized multi-order Helmholtz resonator

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