**Sonic Weapon Used on Protesters in Belgrade**
A special organization that looks into human rights and audio investigations said that a machine that makes loud noise was used against protesters in Belgrade. This happened on March 15.
The Earshot organization looked at 12 videos of the event. They found that 4 of these videos show a sound that is similar to what comes out of a machine called Vortex Ring Gun or Vortex Cannon.
This machine makes a loud noise and can cause people’s devices to malfunction, like hearing aids. This matches with reports from people who were at the protest.
The Earshot organization said that if this was indeed the Vortex Cannon, it would be very far away. At this distance, only the sound of the pressure wave could be heard, causing panic among the crowd.
Earshot is asking anyone with video footage to contact them so they can investigate further.
**What is a Vortex Ring Gun?**
A Vortex Ring Gun is an experimental machine that uses high-energy gas rings to control crowds. It’s not meant to hurt people but can be used to knock them down or spray them with something.
**Background**
The Earshot organization was contacted by activists in Serbia on March 16, 2025. They were investigating the use of sonic weapons against protesters who were holding a silent vigil for victims of an accident.
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