this post was submitted on 14 Jan 2024
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There are easier ways to cause chaos:
Get a cheap phone.
Write some code to have it play, at the loudest possible volume, a pure sine wave at 18000hz to 19000hz, just outside of the range nearly all humans can consciously be aware of hearing a sound, but within the range that prolonged exposure to this sound can cause humans to become panicked, irritable, delusional, sometimes even hallucinatory, and have immense difficulty sleeping.
Leave the phone somewhere.
Obviously, do not actually do this.
Probably this would be considered terrorism, and get you in about as much trouble as fucking about with your conception of what could be used as a sort of crap tier EM jammer.
I'm saving this for later.
You don't need a phone at all to do this. Or code. Or silicon. Just a cheap RC oscillator circuit tuned to that frequency and connected to a battery and a tweeter speaker.
Edit: where's RadioShack when you need it?
AliExpress bots have probably already read this comment and put together a 'panic inducer top quality rechargeable usb frequency tweeter for wedding, birthday, sonic warfare, corporate and special event' which you can buy for five dollars
Driven out of business by the CIA and FBI to prevent this from being easily doable no doubt!
(kidding, obviously lol)
What app can do this? And do phone speakers even reach this range?
To the best of my knowledge,
no, which is why I said write some code,
And,
it technically depends but probably most speakers for most consumer grade hardware can do this, though I do not know about optimal decibel levels at such decibel ranges to be necessary to induce the effect, relative to time, battery life, energy cost, etc.
I will again repeat DO NOT DO THIS.
It legitimately could be considered terrorism.