Mosquito

Noisy kids hanging out in front of your shop? Get the Mosquito; a teen repellent, which emits a high-pitch frequency that most teenagers can hear--but not most adults.
I would love to set up some speakers to shoo away the kids that scream and bounce their soccer ball of the wall of the apartment where I teach English.
I downloaded the MP3 file from NPR (http://download.npr.org/anon.npr-mp3/atc/atc_teenbuzz.mp3) and played it back in iTunes. I don't know if this is really the same sound or even if it is at the right frequency, but I found it to be irritating; it started to give me a slight headache, too!
I'm almost 40 years old, so I am not supposed to hear this sound. I would love to know if anyone else in their 30s or older can hear the high-pitch frequency.


