Investigations on an electroactive polymer based tunable Helmholtz resonator

A. Abbad; K. Rabenorosoa; M. Ouisse; N. Atalla

doi:10.1117/12.2259883

11 April 2017 Investigations on an electroactive polymer based tunable Helmholtz resonator

A. Abbad, K. Rabenorosoa, M. Ouisse, N. Atalla

Author Affiliations +

Proceedings Volume 10164, Active and Passive Smart Structures and Integrated Systems 2017; 101640P (2017) https://doi.org/10.1117/12.2259883
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2017, Portland, Oregon, United States

Abstract

A Helmholtz resonator is a passive acoustic resonator classically used to control a single frequency resulting from the cavity volume and the resonator neck size. The aim of the proposed study is to present a new concept and strategy allowing real-time tunability of the Helmholtz resonator in order to enhance acoustic absorption performances at low frequencies (< 500 Hz). The proposed concept consists in replacing the resonator rigid front plate by an electroactive polymer (EAP) membrane. The first proposed strategy consists on a change in the mechanical properties of the membrane resulting from the applied electric field. This induces a resonance frequency shift. A second strategy is based on a well-located spring, which could direct the membrane deformation following the axis of the resonator to obtain a cavity volume variation. Both strategies allow variation of the resonance frequency of the device. Experimental measurements are performed to determine the potential of this concept for improvement of low-frequency performances of the acoustic devices.

Citation Download Citation

A. Abbad, K. Rabenorosoa, M. Ouisse, and N. Atalla "Investigations on an electroactive polymer based tunable Helmholtz resonator", Proc. SPIE 10164, Active and Passive Smart Structures and Integrated Systems 2017, 101640P (11 April 2017); https://doi.org/10.1117/12.2259883

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