Grey Thoughts
Teenager repellent
Have trouble getting your lazy children out of the house to exercise? Tired of troublesome youths congregating outside your store? Want to clear out the church sanctuary within an hour after a youth service? Now, Science gives you the answer. Meet the all new, all noise, teenager repellent 'Mosquito'. From the article
The device...emits a high-frequency pulsing sound that, he says, can be heard by most people younger than 20 and almost no one older than 30. The sound is designed to so irritate young people that after several minutes, they cannot stand it and go away.

Want some peace and quiet? So how does the mosquito sound?
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