A social media challenge claims only people under the age of 25 can hear a certain high-pitched sound. You can check out the noise for yourself here:
Could you hear it?
Now, you don't need me to tell you that as we get older our hearing and eyesight can deteriorate - much like our ability to enjoy a night out with a three-day hangover.
As a consequence of this, the theory claims, only those who are around 25 or under are able to hear the high-pitched noise in the clip.
