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Tunable Helmholtz resonators using multiple necks

Papadakis Nikolaos, Stavroulakis Georgios

Απλή Εγγραφή


URIhttp://purl.tuc.gr/dl/dias/F1ACDF52-DECA-4241-A9D5-17E8E3836859-
Αναγνωριστικόhttps://doi.org/10.3390/mi14101932-
Αναγνωριστικόhttps://www.mdpi.com/2072-666X/14/10/1932-
Γλώσσαen-
Μέγεθος14 pagesen
ΤίτλοςTunable Helmholtz resonators using multiple necksen
ΔημιουργόςPapadakis Nikolaosen
ΔημιουργόςΠαπαδακης Νικολαοςel
ΔημιουργόςStavroulakis Georgiosen
ΔημιουργόςΣταυρουλακης Γεωργιοςel
ΕκδότηςMDPIen
ΠερίληψηOne of the uses of Helmholtz resonators is as sound absorbers for room acoustic applications, especially for the low frequency range. Their efficiency is centered around their resonance frequency which mainly depends on elements of their geometry such as the resonator volume and neck dimensions. Incorporating additional necks on the body of a Helmholtz resonator (depending on whether they are open or closed) has been found to alter the resulting resonance frequency. For this study, tunable Helmholtz resonators to multiple resonance frequencies, are proposed and investigated utilizing additional necks. The resonance frequencies of various multi-neck Helmholtz resonators are first modeled with the use of the finite element method (FEM), then calculated with the use of an analytical approach and the results of the two approaches are finally compared. The results of this study show that Helmholtz resonators with multiple resonances at desired frequencies are achievable with the use of additional necks, while FEM and analytical methods can be used for the estimation of the resonance frequencies. Analytical and FEM approach results show a good agreement in cases of small number of additional necks, while the increasing differences in cases of higher neck additions, were attributed to the change in effective length of the necks as demonstrated by FEM. The proposed approach can be useful for tunable sound absorbers for room acoustics applications according to the needs of a space. Also, this approach can be applied in cases of additional tunable air resonances of acoustic instruments (e.g., string instruments).en
ΤύποςPeer-Reviewed Journal Publicationen
ΤύποςΔημοσίευση σε Περιοδικό με Κριτέςel
Άδεια Χρήσηςhttp://creativecommons.org/licenses/by/4.0/en
Ημερομηνία2025-02-19-
Ημερομηνία Δημοσίευσης2023-
Θεματική ΚατηγορίαHelmholtz resonatoren
Θεματική ΚατηγορίαMulti-neck Helmholtz resonatoren
Θεματική ΚατηγορίαSound absorberen
Θεματική ΚατηγορίαArchitectural acousticsen
Θεματική ΚατηγορίαRoom acousticsen
Θεματική ΚατηγορίαMusical acousticsen
Θεματική ΚατηγορίαFinite element methoden
Θεματική ΚατηγορίαSound absorptionen
Θεματική ΚατηγορίαAcoustic transmissionen
Βιβλιογραφική ΑναφοράN. M. Papadakis and G. E. Stavroulakis, “Tunable Helmholtz resonators using multiple necks,” Micromachines, vol. 14, no. 10, Oct. 2023, doi: 10.3390/mi14101932.en

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