Tarry for the Nonce

February 15, 2006

The Mosquito

Filed under: Science — lmwalker @ 6:06 pm

If you would like to keep small children and annoying teen-agers at bay:

Shopkeepers in central England have been trying out a new device that emits an uncomfortable high-pitched noise designed to disperse young loiterers outside their stores without bothering adults . . .

“The noise can normally only be heard by those between 12 and 22 and it makes the listener feel uncomfortable,” she added.

Once in their early 20s, people lose their capacity to hear sounds at such a high pitch.

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