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A tunable acoustic energy harvester consisting of dual piezoelectric cantilever beams and a Helmholtz resonator with a perforated backplate is proposed. The tunability of the operation frequency band can be achieved not only via simply adjusting the radius (r) of the aperture due to the strong dependence of resonance frequencies of the Helmholtz resonator on the acoustic impedance affected by r, but...
In this paper, enhanced acoustoelectric transduction in an acoustic energy harvester using dual Helmholtz resonators has been reported. The harvester uses a pair of cavities mechanically coupled with a compliant perforated plate to enhance the acoustic coupling between the cavity and the plate. The experimental results show that the volume optimization of the second cavity can significantly increase...
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