Recent evolution in Acoustic Energy Harvesting (AEH) indicate that beyond its communication function, sound can be a potential energy resource for powering contemporary and future applications operating in the range nW - mW. Acoustic energy can be either ambient or produced via speech and music reproduction, portable and mobile devices, jet and automobile engines, means of transport, electroacoustic transducers, etc. This work provides a short review of relevant studies in the art and focuses on AEH inside closed-box loudspeaker enclosures.
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