scholarly journals Effect of nonlinear frequency dependence of seabottom sound attenuation on low‐frequency acoustic response in shallow water

1986 ◽  
Vol 79 (S1) ◽  
pp. S40-S40 ◽  
Author(s):  
Ji‐xun Zhou ◽  
Peter Rogers
Keyword(s):  
Frequency Dependence ◽  
Shallow Water ◽  
Low Frequency ◽  
Sound Attenuation ◽  
Nonlinear Frequency ◽  
Acoustic Response

Low‐frequency acoustic response of shallow water ducts

1985 ◽  
Vol 78 (2) ◽  
pp. 622-631 ◽  
Author(s):  
Anthony I. Eller ◽  
David A. Gershfeld
Keyword(s):  
Shallow Water ◽  
Low Frequency ◽  
Acoustic Response

William M. Carey and the nonlinear frequency dependence of low frequency attenuation in sandy sediments

2014 ◽  
Vol 135 (4) ◽  
pp. 2260-2260
Author(s):  
Allan D. Pierce ◽  
William L. Siegmann ◽  
Jon M. Collis ◽  
Richard B. Evans ◽  
Jason Holmes
Keyword(s):  
Frequency Dependence ◽  
Low Frequency ◽  
Nonlinear Frequency ◽  
Sandy Sediments

Low-frequency bottom reverberation in shallow-water ocean regions

2004 ◽  
Vol 50 (1) ◽  
pp. 37-45 ◽  
Author(s):  
V. A. Grigor’ev ◽  
V. M. Kuz’kin ◽  
B. G. Petnikov
Keyword(s):  
Shallow Water ◽  
Low Frequency

Nonlinear behavior of Helmholtz resonator with a compliant wall for low frequency, broadband noise control

2021 ◽  
pp. 1-29
Author(s):  
Maya Pishvar ◽  
Ryan L Harne
Keyword(s):  
Dynamic Response ◽  
Low Frequency ◽  
Nonlinear Behavior ◽  
Helmholtz Resonator ◽  
Broadband Noise ◽  
Sound Attenuation ◽  
Wall Material ◽  
Modeling Framework ◽  
Compliant Wall ◽  
Broadband Sound

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

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