High-Frequency Ringtone. Can You Hear It?

NPR recently reported a story about a British invention called the Mosquito Teen Repeller.

The Mosquito creates a high-pitched sound that is audible to teens, but supposedly not to older adults.

Because it's an irritating noise, the idea was that it would disperse groups of teenagers loitering in public places. The teens, however, figured out how to record the sound and use it as a ringtone for their cellular phones.

Figuring that their "old" teachers couldn't hear the sound, the kids began using the high-pitched ringer to alert them to text messages while in class.

Devious.

Anyhow, this is a fairly dated news story. But I'm interested to find out how many of you can hear this sound.

Click HERE and listen to the ringtone.

Now that you've listened to the sound, I'm betting that you did hear it. Although the high frequency oscillation is difficult for some older ears to detect, I haven't run into many people who fail to hear it.

Now, post a comment and tell me if you heard it or not.

PS - You can download that sound file and use it as a ringtone yourself. You deviant teen, you.