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The Mosquito - Wikipedia

en.wikipedia.org/wiki/The_Mosquito

The Mosquito or Mosquito alarm is an electronic device used to deter loitering by young people by emitting sound at high frequency, in some versions so it can only ... They can leave the area when t...

Can You Hear This Sound That Only Young People Can Hear

www.buzzfeed.com/daves4/how-young-are-your-ears

Mar 2, 2015 ... Apparently, there's a noise that only people under 25 can hear. Can you hear it?..

www.ask.com/youtube?q=Sounds Only Kids Can Hear&v=YxhUBBYX2GA
Feb 28, 2013 ... sound only kids can hear (100% works) try at school on your teachers!!!!!!!!!!!!!
www.ask.com/youtube?q=Sounds Only Kids Can 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!

Try It: Can You Hear These Sounds Only Young People Hear?

www.yahoo.com/health/try-it-can-you-hear-these-sounds-only-young-112627654778.html

Mar 3, 2015 ... There are sound frequencies that only young people can hear. Find out how old your hearing is.

Kid Annoyer - Android Apps on Google Play

play.google.com/store/apps/details?id=com.intaipei.zach.dogwhistlekidannoyer&hl=en

This app generates tones between 14,000 and 20,000 Hz, which are on the higher end of the ear's limitations. Generally only young people can hear these ...

Kids Be Gone: High Pitch Only Teens Can Hear Used As Deterrent ...

www.huffingtonpost.com/2008/04/23/high-pitch-only-teens-can_n_98304.html

Aug 21, 2009 ... The sound was coming from a wall-mounted box, but not everyone can hear it. The device, called the Mosquito, is audible only to teens and ...

Ultrasonic Ringtones

www.ultrasonic-ringtones.com/

Find out just how far your ears can hear into the range of ultrasonic ringtones. ... This means that they can only be heard by kids and generally can't be heard by ...

What sounds can only kids hear? | Reference.com

www.reference.com/science/sounds-can-only-kids-hear-bbafaaad885f966

According to Scientific American, kids can hear sounds above about 16 Hz, which are difficult or impossible for adults to hear. As humans age, presbycusis or  ...

Sonic Science: The High-Frequency Hearing Test - Scientific American

www.scientificamerican.com/article/bring-science-home-high-frequency-hearing/

May 23, 2013 ... Things got even more interesting when some kids realized they could turn this ... some listeners can hear it easily, whereas others perceive only silence. ... If you couldn't hear the Mosquito sound, you can still test your limits by ...

Answer
The normal human hearing range is between about 12 and 20 kHz, but beginning around age 8 this range begins to shrink, and adults can no longer hear sounds above a certain frequency level.
More Info

The Teenager Audio Test - Can you hear this sound? - The Oatmeal

theoatmeal.com

Clicking the play button below will produce a tone that is generally only heard by ... The elderly and people with hearing damage often cannot hear the sound. ... I am here to teach you about animals in space · Why haven't you had kids yet?

Mosquito Sound - Android Apps on Google Play

play.google.com

Did you know adults can't hear high frequency sounds that teenagers can? Well with this app you try yourself. This app emits a high frequency sound (at ...

Hearing test: Can you hear like a teenager? - Audio and Sound

www.noiseaddicts.com

Feb 26, 2009 ... Be Careful, the sound (if you can hear like a teenager) is loud and ... i am 14 and can only hear to 16 khz :/. well, my sister can hear to 18 khz but .... I used to be appalled at the very young people blasting their ears on Ipods.