Written – July 9 2010
Alright a while ago stores were playing a high frequency tone that only teenagers can hear so that they would get annoyed and stop hanging out in the parking lot.
Everything was perfect until someone had a brilliant idea, lets create a ringtone out of it, and no adults will ever know when we get a call.
It’s perfect for school!!!
What I really love about this is that someone had an amazing out of the box idea.
Check here for more details and to test how good your hearing is, I can hear up to 17.4 khz perfectly.