Sound Teaser Sonic Prank

Such devices like the "Mosquito" or "Sound Teaser" have been used for expel loitering teenagers at public places for years. The emitted high frequency sounds can not be longer perceived by most elderly. This is due to hearing loss in age.
Now you can turn your smartphone or tablet into a simulated Sound Teaser, which drill with its high-pitched tone into the ears of your friends. Prank for example your classmates, who complain about an annoying whistle during which your older teachers do not listen.

The app includes a total of six frequencies between 10Hz to 20kHz. Your choice should fall on the highest still audible tone. If you're not sure, you can easily click through from top to bottom, until you notice a reaction of your opponent.
In order to enhance the effect of the high frequency tones is reproduced in sine form.

Note that for the correct reproduction the speaker is dependent. It is possible that your phone can not play all frequencies clear.
Optionally, it is advisable to connect the device to an external speaker via the headphone output or Bluetooth.

The use of this free Android tools at your own risk! Adverse health effects are not scientifically totally excluded! Please accept, when your friends feel disturbed by the high-pitched tone and prohibit further use.

If you like the Sound Teaser Ultrasonic Prank, please rate it positive at the Google Play Store. Bugs and feature requests are welcome via e-mail.