• dust_accelerator@discuss.tchncs.de
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      3 days ago

      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

    • Flemmy@lemm.ee
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      4 days ago

      Maybe it’s a tone above hearing levels like a heavy tinitus attack in your hearing membrane.

      • Komodo Rodeo@lemmy.world
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        4 days ago

        I watched the original video when it dropped but couldn’t discern any sound from the weapon itself. Watch the clip here - the crowd reacts at the 0:07 mark without any discernible loud sound, although it was described by victims as “being like a train whistle” (i.e. excruciatingly loud and panic-inducing).

    • Komodo Rodeo@lemmy.world
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      4 days ago

      There is, you just can’t hear the weapon in the footage of the attack on the vigil.

      In the same way that human ears can’t hear much of the noise happening around them, we wouldn’t be able to hear recordings of the weapon in use because it’s ultrasonic. Picture a literal dog whistle and our inability to hear it despite it fully capturing a canine’s attention, except as a restricted military-grade weapon for injuring and dispersing crowds.