I remember in about year 8, a few girls in my class had an app on their phones that produced such a specific high pitched noise that the teacher couldn’t hear it. They would play the same pitched ring on repeat during class and we would be laughing in hysterics (as you do in year 8, find everything funny) because the teacher legitimately couldn’t hear anything. I found this so amazing. I didn’t understand that what we hear can actually change as age increases and there actually are certain pitches that people above a certain age can’t physically hear.

According to this YouTube video by ‘AsapSCIENCE’, specific pitches can actually be heard by different ages, and it proves that the older you are, the less Hz are able to be heard.

8000 Hz = everybody

12,000 Hz = Under 50

15,000 Hz = Under 40

16,000 Hz = Under 30

17,000 Hz = Under 24

19,000 Hz = Under 20

 

I tested this on my mum who is 50 and she could only hear up to 12,000 Hz, nothing higher.