Researchers have fabricated a hair-thin microphone made entirely of silica fiber that can detect a large range of ultrasound frequencies beyond the reach of the human ear. Able to withstand temperatures up to 1,000°C, the device could eventually be used inside high-voltage transformers to detect early signs of failure before power outages occur.
Hair-thin silica fiber microphone detects ultrasound from 40 kHz to 1.6 MHz
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