• davidgro@lemmy.world
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        3 months ago

        I’m in my 40s and still can hear that frequency just fine. Probably not as loud.

        One of my least favorite types of thing are those “teenager repellent” devices.

        Also certain induction cooktops.

        • SkyeStarfall@lemmy.blahaj.zone
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          3 months ago

          Also the “kid repeller” devices (because yes, it also includes younger people such as infants, and also older people), is that it just makes the world a hostile place for young people, and then later people turn around and complain how “nobody goes outside anymore”

          In addition, this severely affects animals too

        • Dharma Curious (he/him)@slrpnk.net
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          3 months ago

          We don’t have a range, and I use portable 110v induction cookers. I love them so much, but I must have music or YouTube or something playing while cooking, or I want to stab a fork into my own ears

          • tal@lemmy.today
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            3 months ago

            I don’t think that there’s any fundamental reason that an induction cooker needs to be doing anything around 20kHz. I’d guess that it’s just the power supply happening to be flipping power on and off at that frequency.

            You could probably just get a different cooker.

        • Duamerthrax@lemmy.world
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          3 months ago

          They put those “teenager repellent” devices in malls. And what do you know, malls are dying.

          My favorite use of those was teenagers using that as their ringtone so the teachers couldn’t hear it.

          • CommissarVulpin@lemmy.world
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            3 months ago

            Some kids at my high school tried that on their phones, but it never worked because all the other kids in the room would cuss them out for basically inflicting the entire room with mosquito-in-ear noises.

          • davidgro@lemmy.world
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            3 months ago

            I wish I knew. It was in the cafeterias at work, and I would be the only person in a room of a hundred who was standing there plugging my ears and cringing from the pain.

      • jaybone@lemmy.world
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        3 months ago

        I hear the chirping of shoes on televised basketball games. No one believes it until you meet someone else who can hear it too. Some people can just hear higher pitch sounds.

        Edit: and yeah, I can hear when a CRT tv is on.

          • jaybone@lemmy.world
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            3 months ago

            I don’t know. I thought everyone could too. Until it turned into an argument at like thanksgiving or something. I don’t watch sports but the rest of my family does.

        • The_v@lemmy.world
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          3 months ago

          The chirping noises from shoes is so annoying. When I watch college basketball it’s with the volume off.

      • The_v@lemmy.world
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        3 months ago

        The whine on larger the TV’s were so damn loud. My neighbor’s had one of those massive beasts of a CRT. I could hear it 100 feet away.

        My first migraines where triggered in the computer lab from 40 CRT monitors being on. It was so loud and annoying.

        • xthexder@l.sw0.com
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          3 months ago

          Well I definitely can’t anymore. Either that or there’s been several CRT TVs on around me ever since I went to that loud concert…

      • orphiebaby@lemm.ee
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        3 months ago

        I’ve been telling people for a while that I can hear it too. Nice to know I’m not the only one.