This news made went out these days and it seems that everybody is quite interested in it.
It seems that some people start using ultrasounds specially designed to be heard only by teenagers in order to keep them away from certain adult shops [link]
On the other hand, some teenagers designed special mobile phone ringtones which can be heard only by themselves and not by the elder people – like teachers – which enables them to leave their cellphones on during the classes :) [link]
You can find sort of a test sound here. If you are a teenager (up to 25 years old) you should be able to hear it, the elders should not. I tried and I can hear it, can you ?
3 comments so far
so can I
I can’t hear it. Then again, I’m 30.
What am I listening for? I hear a few different noises in there. One sounds like insect wings beating (or possibly a car in the distance), another sounds like girls giggling, and then something metallic being struck.
And, supposedly, I’m not able to hear it? Meh.
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