Coherence resonance in acoustic cavity system with coherent feedback

Cuicui Li, Bixuan Fan and Zhenglu Duan

Chaos, Solitons & Fractals, 2025, vol. 192, issue C

Abstract: A nonlinear system, when subjected to external noise, can exhibit resonance peak characteristics in response to varying noise intensity, a phenomenon known as coherence resonance. Coherence resonance holds significant theoretical importance across fields such as energy harvesting, biology, and physics. In this work, we explore the phenomenon of acoustic coherence resonance in a nonlinear acoustic cavity system with coherent feedback. The results show that under the excitation of external noise at an appropriate intensity, the acoustic intensity within the cavity exhibits peak behavior. The region where resonance peaks occur largely coincides with the bistable region of the system, indicating that bistability plays an important role in the emergence of coherence resonance. We find that, by adjusting the feedback ratio and phase delay in the coherent feedback loop, coherence resonance can be flexibly manipulated, i.e., varying from no resonance, to the mono-peak coherence resonance, and to the double-peak coherence resonance. Our findings provides theoretical guidance for future applications in noise energy harvesting within acoustic cavity systems.

Keywords: Coherence resonance; Nonlinear system; coherent feedback (search for similar items in EconPapers)
Date: 2025
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Persistent link: https://EconPapers.repec.org/RePEc:eee:chsofr:v:192:y:2025:i:c:s0960077925000736

DOI: 10.1016/j.chaos.2025.116060

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