- A new fiber containing piezoelectric materials can act as a microphone — picking up speech, rustling leaves and chirping birds — and turns those acoustic signals into electrical ones. Woven into a fabric, the material can even hear handclaps and faint sounds, such as its wearer’s heartbeat. https://www.sciencenews.org/article/fabric-hear-heartbeat-fiber-vibration-voltage-sound-material 8 comments science
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