iPhones assault teenagers with 'mosquito' ringtone

The Mosquito ringtone and security device both take advantage of the tendency of the human ear to become progressively poorer at hearing high frequencies as we grow older

The high frequency, anti-teenager 'Mosquito' ringtone can now be downloaded to your iPhone via an iTunes podcast

Curmudgeonly iPhone owners who want to keep teenagers away from their precious handset can now download a special high-frequency 'mosquito' ringtone to drive them away.

The so-called 'Teenbuzz' ringtones are in the 17 kHz - 22 kHz range which makes them inaudible to people over 24 but can prove intensely annoying to younger adults and teenagers.

The use of high-frequencies to deter teenagers was recently in the news when a UK inventor patented the Mosquito device to stop young people congregating in shop fronts or bus depots.

The Mosquito ringtone and security device both take advantage of the tendency of the human ear to become progressively poorer at hearing high frequencies as we grow older - a phenomenon known as presbycusis.

The free ringtones are available for iPhone users via the novel method of subscribing to the Teenbuzz podcast which includes a variety of ringtones at different frequencies.

iPhone users can then sync the downloaded ringtones to their handset via iTunes. You can find full, illustrated instructions on the Teenbuzz website.

Of course, the fact that you will now have a ringtone that is completely inaudible to you is neither here nor there. At least no rat-faced, hoodied chav will get their grubby mitts on your Jesus phone!