Helmholtz resonator with two resonance frequencies by coupling with a mechanical resonator

Publikationstyp
Journal Article
Publikationsdatum
2023-09-01
Sprache
English
Author
Hoppen, Hannah 
Langfeldt, Felix orcid-logo
Gleine, Wolfgang 
Estorff, Otto von 
Institut
Modellierung und Berechnung M-16 
TORE-URI
http://hdl.handle.net/11420/15371
Enthalten in
Journal of sound and vibration 
Volume
559
Article Number
117747
Citation
Journal of Sound and Vibration 559: 117747 (2023-09-01)
Publisher DOI
10.1016/j.jsv.2023.117747
Scopus ID
2-s2.0-85159457041
This contribution presents the acoustical properties and corresponding theoretical descriptions of a Helmholtz resonator with an integrated cantilever inside the Helmholtz resonator neck. The advantage of this resonator design is a second resonance frequency, which leads to a supplemental frequency region with high sound absorption properties. An analytical model is derived to calculate the resonance frequencies and the absorption coefficient of the resonator system. This model has been verified with finite element simulations for the resonance frequencies, taking into account several geometric parameter variations. It has been validated experimentally for the calculated absorption coefficients by impedance tube measurements. In conclusion, it has been found a high influence of the geometric parameters on the resonance frequencies and a broader sound absorption performance of the coupled resonator system.
Schlagworte
Absorption
Cantilever
Helmholtz resonator
Lightweight
Mechanical absorber
Resonance frequency