Why can’t I hear that annoying high-pitched mosquito sound even though I am only 17 years old?

Question by tripleplay: Why can’t I hear that annoying high-pitched mosquito sound even though I am only 17 years old?
I recently noticed playing “sound grenade” on the iPhone or similar apps for Windows Mobile. People eeek in annoyance of this sound in class, but for some odd reason I cannot hear it. I pass all of my hearing tests at the doctors and have no trouble hearing any sounds to my knowledge. Does anyone know why I (a 17 year old boy) cannot hear this sound, but all of my other classmates can?

Best answer:

Answer by lilax591
The frequencies of these ring tones are just on the verge of not being heard by any human! The ability to hear these is not actually a test of how well you can hear, but rather the highest frequency of sound you can detect. You may actually have the best hearing of all your classmates, you can detect a whisper or perfectly understand a conversation far away, the fact of the matter is the ability to hear these ring tones isn’t of any importance. Adults struggle to hear them because a natural regression in their perception of certain frequencies. A harmless and natural process.

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