The Mosquito or Mosquito alarm is an electronic device used to deter loitering by
young people ... The risk to the target group of teenagers and young adults is
relatively low. They can leave the ar...
www.ask.com/youtube?q=Sound Adults Can't Hear&v=RG0O478CQ-E
Oct 5, 2008 ... This is a high-pitched sound that people over the age of 25 shouldn't hear. The
sound seems to work better in a higher quality.
www.ask.com/youtube?q=Sound Adults Can't Hear&v=VoFGKwZxT_o
Nov 21, 2009 ... This is the sound adults over 30 cannot hear.(some may not qualify)Enjoy!plz
comment,rate and subscribe!
Mar 3, 2015 ... On the flip side, teens are striking back by employing these pitches as ringtones,
so they can get calls that their parents and teachers can't hear.
Mar 2, 2015 ... Apparently, there's a noise that only people under 25 can hear. ... As you get
older, the hearing process (sound waves travel into your ear, hit your eardrum,
and vibrate three tiny bones, ... No, I can't ... PHOTO: Adult Swim.
Jul 20, 2010 ... Stealth Tone is a special tool that most 20+ year olds cannot hear! Due to a
special frequency, you can play this annoying sound in stealth ...
Jun 2, 2015 ... Think you have perfect hearing? There are still plenty of sounds in the world that
you can't detect.
... and sounds similar to a buzzing mosquito. The elderly and people with hearing
damage often cannot hear the sound. Can you hear this sound? Click to play.
Teens are effectively driven away, but many adults can't hear this sound at all!
Things got even more interesting when some kids realized they could turn this ...
This means that they can only be heard by kids and generally can't be heard by
adults over the age over 20 or so. See this article at the BBC to find out more.