Which tones can you hear?

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http://kw01.katazo.com/mosquito-tone/#


Post what your age is too so we all know how good our hearing is at your age. I am wondering if people with senstaive hearing can still hear the tones into their 30's and middle adult hood and late. That's what I'm trying to find out.


I heard the first three well and I am almost 22. The last three I couldn't hear when the moter started running on my brother's laptop. On my Dad's computer I could only hear the first two but could hear them all again when I had the speakers up all the way.

I heard the first two. Definitely couldn't hear the third. The fan on my laptop is running, so I might have been able to hear the third if it was absolutely silent. I'm 26.

I just wonder how many kids can hear these, or how many will continue to be able to hear them, with so many of them listening to mp3 players with earbud-style headphones?

I could hear the first two quite clearly. I could hear the third one vaguely. The next two left this weird tense feeling in my head. I'm not sure how to explain that. It felt like my brain was cringing. I'm not sure if it's because my brain was still registering the sound without really "hearing" it, or if it was a "shadow sound," because I've had incidents where I'll hear a sound long after the sound has stopped, but it still feels like I'm hearing it. It could also be because I was expecting a sound, though, really, the sound is still creating waves. I don't know enough about how sound works, or about how the brain registers sound to really say.

Breifly:

I could definitely hear the first two, and I could hear the third one to an extent. I didn't really hear four and five, but they both did make my head feel weird for a number of possible reasons. The sixth one didn't affect me at all.

I'm 23.

Do any of you two have sensative hearing? Have acute sense of hearing?

Okay, how about this one:


http://www.ultrasonic-ringtones.com/


I can hear them on low volume but the 15.8HZ and above I can't. On medium volume I heard up to 17.7 and on high volume, I heard them all but the last one.

I could hear almost all of those. I'm not entirely sure that I heard the last one. I think I did, but I don't remember, and then my fan kicked on louder again. The funny thing is that I had trouble hearing the 16.7, but I could hear the ones around it. Go figure. And I'm still 26.

I don't know if I have extremely acute hearing or not. I do have trouble blocking out auditory stimuli, such as keyboard noise, pens clicking, footsteps, etc.

Oh, and Spike (the cat) can hear all the ones on the second site. He can hear the first three on the first site (with the laptop fan running). He might be able to hear more, but he's not showing any indication that he is. The others, he was looking around and twitching his ears.

I can hear the first three. I'm 24.

I'm 28. I could hear up to the 17 range, and beyond that it was silent even when maxed out. I had tubes in my ears when I was a kid, but I'm questioning whether my speakers can handle it, actually. I had previously done a test on myself with pure sine waves I generated with csound (a very cool program, BTW) using different speakers and, though I could not perceive an actual pitch, I got a sensation of pressure in my ears at pitches far above the normal hearing range, into the upper 20s. (This was only about 2 years ago.)

From what I understand, there is the normal hearing apparatus, and then there is an additional bubble-like chamber in the bone which is suspected of providing additional sensitivity at higher pitches. I think it is this 'bubble' which causes my ability to hear muted TVs, flourescent lights, etc., despite damaged eardrums and a history of chronic ear infections.

And for the second bunch, I can hear up to C#.

But the funny thing is, for the ones I can't "hear", I still get to feeling annoyed while they're playing. I just probably couldn't put my finger on why I was annoyed, if I didn't already know.

I find that I get easily overwhelmed by noise. When I was younger, though, it was believed that I had a hearing impairment because I had trouble understanding what people would say. Of course, I was a kid so I would say, "I couldn't hear you," when what I really meant was, "I couldn't make sense of what I just heard you say."

When I was a kid, though, the sound of being in my classroom at lunch time would make me throw up, and I still have problems where if I go out, I get very anxious, or if I'm in a room where two people are talking, or where a TV/Radio is on and someone is talking, I feel anxious. I hypverventilate, and get nauseous.

I listened to all of those. I could hear them all on a medium volume except for the 17.7 kHz (which on medium volume left me with that feeling of "hearing without hearing," or "brain cringing," and the 22.4 kHz, which I couldn't hear at all. It was weird, because I couldn't hear the 17.7 at all, and then the next three were perfectly discernable.

On a high volume I can hear all of them except the 22.4 kHz one. I can't hear the 22.4 kHz one at all.

Hm. I'm curious. Are they supposed to change in pitch? I'm assuming that they are, because as they go up in frequency it seems like they're going up in pitch, kind of like going up a musical scale. But when it hit 18.8 kHz and above, for me it sounded lower in pitch than the 8 kHz. 18.8 was much quieter, but much lower in pitch. I also thought it was weird that it started to fade out at 16.7, that 17.7 was barely discernable, but that 18.8 was quite clear again.

And now I'm hearing the tones without having them play. (The 18.8 kHz, and the 19.9 kHz ones are the ones that are shadowing me, specifically, if you'd like to know.)

It's called the Nyquist frequency. When sampling a sound wave, as you approach a certain fraction of the sampling frequency (I think it's 1/2), the samples will appear to go flat, then reverse and start going lower again. It's similar to the phenomenon when you look at a car wheel on the highway and it looks like it's going backwards. The question is, are your ears doing this or is your equipment doing it? I guess if eyes can do it, so can ears?

Age: 16
I can hear 5.
The sixth one I can hear when I start/stop it, but unless I'm doing such I otherwise don't notice it.

Last edited by Ramsus on 31 May 2007, 9:21 am, edited 1 time in total.

That's really interesting information.

Actually, you know, I've done something like that with the car radio. My significant other will turn the car radio volume all the way down (just before the off position) and I'll start singing a song. When we turn the volume up, I'm singing along with the radio.

I don't have eardrum damage though, or at least none that I know about.

The other information on the Nyquist frequency is also very interesting. I have no idea if it's my ears, or if it's my equipment. I tried switching speakers. With my other set of speakers I can:

a) hear 17.7 kHz, but it takes on that same lowered quality of 18.8
b) notice that 17.7 kHz and above seem to be two tones that are an "octave" apart (for lack of a better term). One tone (the lower) is clearly audible. The second tone is something closer to a vaguely discernable sound that is more "pressure" than sound.
c) vaguely hear a lowered sound, and get a sense of pressure from 22.4 kHz
d) state that I'm not sure if it's my hearing, or an expectation, but can conclude that my speakers make a difference. I won't claim to know what my speakers are doing, however.



I'm really not sure my cat is too happy with all the high pitched sounds. Here she is, trying to sleep in my spot on the bed, and I'm making her ears twitch.

I'm 40 and could hear all 6.

My volume was up to the max. I am fourteen years old and roughly nine months.

First link: Up until 19 KHz
Second link: Up until 21.1 KHz

I have a headache now.

None of them. Did get a missing plugin message though.

Age: Older than the hills.