I found this interesting:
Frequency samples

I can hear residual noise at around 25KHz, faint sounds at 21KHz, and I hear the 20KHz sample quite clearly.

We had to do something like this in Drama tech, annoying sounds. It is interesting though when you find people who hear above or below the norm.

I can hear up to 20 clearly and after that I can "sense" the pressure of the noise.

The cool thing about being 14 is that my eardrums arn't as damaged as most are. We had this thing for us durring IED (Intro to Engineering and Design), and everyone there was like, "WTF? I don't hear anything!!! ARGH!" And I was all, "Pff... Deaf losers!" Yeah. Those are fun

It is a pretty interesting thing, I can barely hear the 22k, thats as far as I go. Whats neat is that young people can usually hear things like a muted tv, that adults can't. Once there was a house down the street that whenever you'd get near it, it would let out a high pitched screetch that was nearly deafening to me, but my parents couldn't hear it. But I'm definitely liking the idea of kid repellant.

Good gods, that is painful. I think my ears are still ringing.

I don't understand what you're supposed to do, they all sound bloody painful.

I'm 23, and I can hear the freaking annoying tone in all the samples.

Edit: Wait, I was using headphones. Maybe that is why.

I'm only 20, and I can just barely hear the 18k sample. Past there, I only know that there's a sound because it sets the ringing in my ears off.

I'm 22 and can just barely hear the sound at 19k. And from there, I can feel it less and less with each step up.

In the article, they forgot to mention how that people are making those tones into ringtones so teachers cant here if a cell phone goes off...

Awesome, heh.

My ears hurt :S

Around 18 for me, and I'm 20.

I'm 16, and I can't for the life of me hear 19,000.

New Discipline skill:

Muffle - Reduce your hearing range.
AB DISCIPLINE MUFFLE
By keeping yourself from hearing above 20K hertz, you can effectively make yourself deaf to Kalodan's and Lyreth's shouts, as well as being able to ignore debating and says from similarly squeaky-voiced creatures.

17k Im 17, but I work with sound equipment and do background stuff on stage at school concerts.

At 19, I can hear it clearly until 18K, and feel it until about 23K


Ewww, I need to stop listening to loud music.

Well, I'm 14 and I can hear all of those provided (all the way up to 25k).

But I'm sure that'll shrink when I start using my mp3player at regular, loud intervals. XD

Yeah, I'll be 37 in December, and I can't seem to register the 16,000 khz or above. I can slightly "feel" it, but I don't count that. I also have some background noise at home here.

Veonira, I agree with you about Loud Music. Those "ear buds" are really bad for your ears. They don't block out noise, so people turn up them way loud. I have a feeling young people are going to have serious hearing problems when they get over 40 thanks to that. I've invested in "noise cancelling headphones", when I listen to music on my commute. They may be big, but they'll protect your hearing.

Plus, my Grandpa and Dad both have hearing problems, but that's likely due to them both being patternmakers and working with loud machines, and Grandpa being in the Navy during WW2 and near those big battleship cannons, and Dad being in Vietnam with those Machine Guns going off. So I really want to protect myself nowadays.

Hearing also tends to be one of those things you dont ever get back, so really dont play music and such that loud. Youll regret it.

I'm 17 and can only hear up to 16k, the concrete saw at work really screwed over my high frequency hearing.

EDIT: Hmm... nevermind my computer must have been messing up I'll try to go through them again. I can hear it perfectly up to 20k and then I can't even feel the sound after that.

I've actually heard the music coming from earbuds about 3 or 4 seats down from me sometimes on the train. That's a sign the music is too loud. Thankfully, Apple's now releasing firmware to warn people that the music is cranked too loud.

For those worrying though--those ranges are really out of normal "hearing" range. You don't really need to hear frequencies that high--that's why they hurt the ears. But it's a good lesson. According to the makers of that "mosquito noise", people naturally lose some of that ability over time regardless of what we do.