Serbia's populist government is facing increased public scrutiny over reports that it used a sonic weapon against a peaceful crowd during a massive anti-corruption rally in the capital, Belgrade, on March 15.
The same reason you don’t hear ultrasound sensors of cars when backing up. Microphones can only capture a certain frequency range, but you can still hear/feel those waves when they hit you
The same reason you don’t hear ultrasound sensors of cars when backing up. Microphones can only capture a certain frequency range, but you can still hear/feel those waves when they hit you