Coupling effect of acoustic resonators for low-frequency sound suppression

Coupling effect of acoustic resonators for low-frequency sound suppression

G. Catapane, L.M. Cardone, G. Petrone, O. Robin, F. Franco

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Abstract. Acoustic resonators like Helmholtz resonators, micro-perforated panels and quarter wavelength tubes are employed to suppress tonal noise for several industry application. The issue related to the design of these resonators is their bulkiness for low-frequency application and their narrow band behaviour. In this paper, microperforated panels and coiled quarter wavelength tubes are coupled in series and in parallel, tested inside impedance tube for sound absorption. The experimental samples are 3D printed with filament (PLA) additive manufacturing technique. The two acoustic devices are coupled and tested to reach broadband low-frequency noise suppression just by positioning one respect to the other in series or in parallel. The reported results demonstrate that the tonal behaviour of the acoustic devices can lead to enlarged absorption if they are tuned at similar frequencies. The disposition of the acoustic resonators and their frequency tuning hardly impact absorption: indeed, anti-resonance and filtering effect are experienced for series configuration, while parallel configuration is the sum of the two acoustic devices standalone absorption behaviour.

Sound Absorption, Acoustic Resonators, Noise Suppression

Published online 11/1/2023, 4 pages
Copyright © 2023 by the author(s)
Published under license by Materials Research Forum LLC., Millersville PA, USA

Citation: G. Catapane, L.M. Cardone, G. Petrone, O. Robin, F. Franco, Coupling effect of acoustic resonators for low-frequency sound suppression, Materials Research Proceedings, Vol. 37, pp 254-257, 2023


The article was published as article 55 of the book Aeronautics and Astronautics

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