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In 2026, researchers at the EPFL MICROBS Lab unveiled a micro-drone that flies without a battery, relying entirely on sound. This tiny machine stays airborne by converting acoustic energy into physical force. 🚁
The design uses a principle called Helmholtz resonance. Think of blowing air across the neck of a glass bottle. The air trapped inside starts to vibrate because of the airflow. These aircraft feature a specialized resonant cavity that captures ambient sound waves, turning those vibrations into the propulsion needed for flight. 💡
Most standard micro-drones currently rely on heavy batteries or tethered cables for power. This weight forces them to be larger and significantly restricts their potential for true miniaturization. By using sound instead, this design removes the heaviest onboard component, allowing the device to operate with much less bulk.
The future of flight might just be a hum.
#tech #drones #innovation
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