期刊
JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA
卷 140, 期 1, 页码 EL94-EL100出版社
ACOUSTICAL SOC AMER AMER INST PHYSICS
DOI: 10.1121/1.4954869
关键词
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资金
- Metaudible project - Agence Nationale de la Recherche [ANR-13-BS09-0003]
- Fondation de Recherche pour l'Aeronautique et l'Espace
In this work, coherent perfect absorption of sound waves induced by the nonlinear response of a Helmholtz Resonator side loaded to a waveguide, is reported. It is shown that this two-port system can perfectly absorb two high amplitude symmetric incident waves under a certain condition. For the one-sided incidence configuration, this condition leads to an absorption equal to 0.5. Experiments verify these results and are in agreement with an analytical nonlinear impedance model for the resonator. The nonlinear control of perfect absorption opens new possibilities in the design of high amplitude sound attenuators for aero-engine applications. (C) 2016 Acoustical Society of America
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