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Revolutionary Heatproof Microphone Detects Ultrasound in Extreme Conditions

2/13/2026

41 9 Full Breakdown

Summary

Story summary

Researchers at Shanghai University have developed a heatproof fiber-optic microphone that detects ultrasound from 40 kHz to 1.6 MHz.
The device is made entirely of silica fiber and withstands up to 1,000 °C, designed for use in high-voltage transformers to identify early signs of equipment failure.
Its Fabry-Pérot interferometer sits in a 125-micron fiber, enabling operation under extreme conditions with no electromagnetic interference.

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Story summary

Researchers at Shanghai University have developed a heatproof fiber-optic microphone that detects ultrasound from 40 kHz to 1.6 MHz.
The device is made entirely of silica fiber and withstands up to 1,000 °C, designed for use in high-voltage transformers to identify early signs of equipment failure.
Its Fabry-Pérot interferometer sits in a 125-micron fiber, enabling operation under extreme conditions with no electromagnetic interference.