Web Results
www.ask.com/youtube?q=Sound+Adults+Can%27t+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%27t+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!
www.ask.com/youtube?q=Sound+Adults+Can%27t+Hear&v=INdJLAgTucA
May 16, 2016 ... A sound that most people over 30 can't hear for over two minutes. WARNING- Very Annoying.

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

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

www.ask.com/youtube?q=Sound+Adults+Can%27t+Hear&v=d2x2Cs27cHk
Sep 12, 2016 ... My teacher put this on over the speakers and all the kids freaked out but he couldn't hear it so all the kids where like screaming telling him to ...

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

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.

www.mnn.com/health/fitness-well-being/stories/most-people-over-18-cant-hear-these-sounds

Jul 24, 2015 ... Hearing loss is real, something that happens even to those who didn't spend large chunks of their 20s in loud bars.

metro.co.uk/2016/02/27/if-you-cant-hear-this-sound-youre-getting-old-5720888

Feb 27, 2016 ... Those over the age of 25 should not be able to hear what is known as the mosquito tone - a noise above 17.4kHz.

www.ultrasonic-ringtones.com

Find out just how far your ears can hear into the range of ultrasonic ringtones. ... heard by kids and generally can't be heard by adults over the age over 20 or so.