• smeg@feddit.uk
    link
    fedilink
    English
    arrow-up
    7
    arrow-down
    7
    ·
    edit-2
    4 months ago

    Not everyone has the same hearing range (it tends to get worse as you get older, hence those ultrasonic teenager repellers that people claim are for cats). If a device is running at the very low end of what we consider ultrasound and OP can hear higher than most then maybe they can hear the sensors. I would be surprised if an ultrasonic sensor was running this low though.

    • scrion@lemmy.world
      link
      fedilink
      English
      arrow-up
      13
      ·
      edit-2
      4 months ago

      People often believe they are hearing ultrasound, but instead are hearing clicking noise or sub-frequencies emitted from the capsule that are not actually part of the ultrasound.