Journal
BUILDING ACOUSTICS
Volume 27, Issue 2, Pages 169-181Publisher
SAGE PUBLICATIONS LTD
DOI: 10.1177/1351010X20910090
Keywords
Helmholtz resonator; modified shape of the neck; nonlinear behavior
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Funding
- French National Research Agency (ANR) of the Universite de Lyon within the program Investissement d'Avenir [ANR-13-BS09-003, ANR-11-IDEX-0007, ANR-10-LABX-0060]
- Ministere de l'Environnement, de l'Energie et de la Mer
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This article presents some experimental results on Helmholtz resonators for large sound amplitudes with two general geometries of their necks: the resonators with classical (cylindrical) and quadratic nonlinear necks. Obtained results for large amplitudes show accelerated amplitude dependency of resonant frequencies of the resonators with modified shape of the neck compared to classical ones. This nonlinear response can be used as a passive controller system with nonlinear restoring forcing function for having broadband frequency absorption.
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