Swiss researchers built tiny drones powered by sound, using 40 kHz ultrasound and 3D-printed resonators to generate thrust

Engineers from Switzerland have innovated remarkable microfliers and miniature boats that harness sound waves for propulsion.
The Debrief

Scientists Turn Sound Into a New Propulsion System for Tiny Microrobots

Microrobots powered by sound can move, steer and even fly, revealing a new propulsion system for tiny robotic machines.

Scientists create tiny drones and boats powered entirely by sound

The technology was developed by EPFL's MicroBioRobotic Systems Lab in Switzerland, and the study was published in Science ...
Nanowerk

Musical Waters: Making Sound Waves with Bottle Arrays

This experiment demonstrates how water affects sound waves and pitch. You'll discover how different water levels create different musical notes and learn about the relationship between mass, vibration ...