Nonlinear Behavior of Helmholtz Resonator With a Compliant Wall for Low-Frequency, Broadband Noise Control

Abstract Low-frequency sound attenuation is often pursued using Helmholtz resonators (HRs). The introduction of a compliant wall around the acoustic cavity results in two degrees-of-freedom (2DOF) system capable more broadband absorption. In this study, we report amplitude-dependent dynamic response compliant-walled HR and investigate effectiveness compliance to improve absorption linear nonlinear regimes. acoustic-structure interactions between conventional result non-intuitive responses when acted on by amplitudes excitation pressure. This paper formulates studies reduced order model characterize 2DOF with compared that rigid HR. Validated experimental evidence, modeling framework facilitates an investigation strategies achieve attenuation, including selection material, thickness, geometry HR, other parameters readily tuned design. open up new avenues for development efficient exploiting deflection suppression extreme noise amplitudes.