jangofett287
Heat shield 'tester'
- Joined
- Oct 14, 2010
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Reminds me of the ultrasonic rodent repellents which are popular around here in all kinds of malls and shops. They are supposed to be inaudible to humans, but i happen to have an abnormal left ear which can hear up to 19KHz or so. I can see why it works on rodents - the skull-drilling intermittent whine they give out is pretty darn annoying.
Fortunately, i don't have to stay around.
This technology has been practically weaponized in the UK to repel youths by taking advantage of the fact that young people can hear higher frequencies than older people.