Mosquito ring tone?

Recently the NY Times had ran a story about the Mosquito ring tone, a high-pitch ring tone kids have been programming their mobiles to use during class - but inaudible to the teacher.

Allegedly inaudible to adults, this 17Khz ringtone has become popular among teens looking to be able to send and receive text messages surreptitiously in class.

Are you too old to hear it?

Try it out: The mosquito ringtone.

Source>> The Mosquito Ring Tone: This Adult Can Hear It!

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