Belgrade authorities have used sound weapons on the crowd of protesters. The video description has some educational links.

There are lots of videos around.

  • Mubelotix@jlai.luEnglish
    1·
    3 days ago

    Fortunately once people are aware of such tricks, they won’t be effective anymore

      • Sylvartas@lemmy.dbzer0.comEnglish
        2·
        2 days ago

        Sound is moving air and carries energy. With the right frequency and intensity it could definitely physically fuck you up even if your ears are covered.

        Wikipedia:

        Studies have found that exposure to high intensity ultrasound at frequencies from 700 kHz to 3.6 MHz can cause lung and intestinal damage in mice

        • barsoap@lemm.eeEnglish
          1·
          2 days ago

          LRADs are loudspeakers. Loudspeakers which can output in the order of 160db at 1m. Anything can be a weapon when you make it powerful enough.

          • MyScreenName@lemmy.zipEnglish
            3·
            2 days ago

            Technically, yes. A bullet is just a fast moving object.

            I was refering to sheer power of the thing. Guy asked if earplugs would help. LARD gets a tree swinging. It’s not “just a speaker” at that point.