Battery-free sensor harnesses the power of speech

The sound-sensitive sensor requires no external power source and is activated by sound waves produced by certain noises

Researchers have developed a battery-free sensor that reacts to sound waves, such as particular spoken words, producing enough vibrational energy to power an electronic device. The novel sensor would not only reduce battery waste but could also power medical devices like cochlear implants or monitor buildings for faults.

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Category: Energy, Science

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