This article says a store in Britain has been using a high-pitched sound that only people under 20 can hear, but older people cannot, to keep teenagers away. Is this true?

lanfranco

An article on this subject was published in our local (U.S.) paper about four months ago, picked up from a U.K. site. I don't know whether it's true, but I did find several sites online: http://www.msnbc.msn.com/id/10269421/ Mar 24 06, 7:55 PM

Baloo55th

I've heard of this too - possibly in New Scientist as I don't read the national papers. I'd be interested to find out if I could hear it - having avoided discos all my life I have very little hearing loss. Mar 25 06, 7:36 AM

xfacilitatorx

A common rule of thumb used to describe human hearing is that human hearing is sensitive in the range of frequency of 20 Hz to 20 kHz, THOUGH THIS VARIES SIGNIFICANTLY WITH AGE, occupational hearing damage, and gender; some individuals are able to hear up to 22 kHz and perhaps beyond, while others are limited to about 16 kHz. Frequencies capable of being heard by humans are called audio or referred to as sonic. Frequencies higher than audio are referred to as ultrasonic, while frequencies below audio are referred to as infrasonic. http://www.reference.com/browse/wiki/Hearing_%28sense%29 http://www.reference.com/browse/wiki/Hearing_%28sense%29 As one ages, their sound spectrum decreases. All things considered, this ploy or filtration device is feasible and more than likely true. Mar 25 06, 10:16 AM

Baloo55th

It could upset the bats if there are any around where it's used. And that might put a stop to it. Mind you, i don't think there are usually many bats around where teens hang out. Mar 25 06, 2:36 PM

MaggieG 5

It's just down the road from where I work, and I heard from the locals that it worked very well. Shame it has been stopped as it was a harmless way of dispersing the idiots that hung around outside the shop. And you're right about there not being too many bats there, Baloo. Mar 25 06, 3:43 PM

Create a Free FunTrivia ID to add to, request more/new answers, or edit this entry

A game rated 'M' is for people 17 or older. True or false? Is it true that Nebraska has the largest porch swing in the world, and that it can hold 25 people? Can people, who keep in shape, get cellulite? I hear about MSG only in association with Chinese food and that it is bad for you. What exactly is it and do other foods use this, and if it isn't good for you, why do people keep eating stuff with it?

1 The People Under the Stairs I love this movie. It is a classic and I recommend it to anyone who likes weird, creepy thrillers! Pa - Pm Movies Easy 10 Q movie2go Jan 04 07 468 plays 2 People With Intelligence Only This quiz is meant for people who aren't stupid. I'm sure that you're not, so you should do well. Have fun. Mixed 10 Q. Average [C] Average 10 Q Lost_Player Apr 07 01 1896 plays 3 Epitaphs and the People Under Them Let's take a trip to various cemeteries around the world. We'll read the engravings on the tombstones, and learn about the person buried underneath... Last Words & Epitaphs Average 10 Q navycarla Aug 15 04 771 plays