Silent Ringtones Section

It's the latest teen buzz - the perfect way to receive text messages in your classroom or in any room full of adults without being detected! Yes a silent ringtone, a tone that is outside the audible range of hearing for most people over the age of 30! Clever stuff eh!?

How does it work?
The whole concept derives from a product called the Mosquito, a device that emits an annoying ultrasonic hum designed to deter teenage yobs from hanging around outside shops and public buildings. The vast majority of adults cannot hear the sound emitted!

Tip:
You should use the last tone on this list that you can hear. For instance, if you can hear the 17khz and the 18khz tone, use the 18khz - less people will be able to hear it.