28 Jun 2013, 3:42 pm
NOTE: I just gave myself acute tinnitus. 
Be careful with your hearing while using this! 0 is the highest decibel setting, and the more negative you go the quieter it gets. Don't turn it above -4 since you're listening to very high pitches in some cases. Start at -10 and increase from there if it's too quiet to hear.
So a friend of mine posted on Facebook that the lowest sound she can hum is 220 Hz. That got me wondering what 220 Hz sounded like, and led me to look up an online audio-wave generator:
http://www.audiocheck.net/audiofrequenc ... netone.php
That, in turn, made me wonder what the range of sound frequency is that humans can hear. It's said to be 12 Hz at the low end "under ideal laboratory conditions" on up to 20 KHz in children at the highest:
http://en.wikipedia.org/wiki/Hearing_range#Humans
Then, I wondered what ranges I could hear. I tested and re-tested, by entering different values into the generator and them playing them in Windows Media Player. I narrowed it down to the levels at which I could not hear the sound anymore.
I'm 30 years old, and I can hear up to about 17.7 KHz still (17,700 Hz). So my hearing is still pretty good, I'm definitely not a child anymore and it's uncommon for an adult to hear higher than 18 KHz.
My hearing gets weak in the 13 KHz to 14 KHz range, but then it gets stronger again up to 17.7 KHz. Either that, or the wave generator is defective.
Then I tried the low end, and that's where I was surprised. At least using this wave generator, I can hear as low as 11 Hz, and I didn't need ideal lab conditions. That's BELOW the alleged 12 Hz minimum for humans. 
They say most people actually can't hear below 31 Hz.
Hearing relies a lot on the health of your ears themselves, and their receptor cells. But, I'm curious, along with sensory sensitivity, are Aspies able to hear outside of the normal human range?
I am marking "I can only hear sounds lower than the human range" in my poll.
So what do you think, and what range can you hear?
28 Jun 2013, 5:32 pm
I do not fully understand how this test works, but it seems I can hear the sine at 125. Square made me go nuts, is it possible to hear 1 as well lol. Same counts for sawtooth. Triangle down to 10 orso.
Oh wait there is higher sounds as well.
About 17600 for all of them.
Also, I am deaf now, this is some business going on here 
28 Jun 2013, 6:15 pm
You're doing the test right! The point is to try listening to different frequencies at the upper and lower end of the human range, and figure out what your higher and lower limits are.
At least, that's just what I'm suggesting. The website itself isn't actually a test, just a tool. I just realized I could use it to test my hearing range.
I should have tested my high and low limits using other waveforms like you said. Some of them may be easier to hear than others!
As I approached my limits, I noticed I had to turn the sound up more and more to hear it, but often times I could hear it.
28 Jun 2013, 6:31 pm
At least, that's just what I'm suggesting.
The website itself isn't actually a test, just a tool. I just realized I could use it to test my hearing range.I should have tested my high and low limits using other waveforms like you said. Some of them may be easier to hear than others!
As I approached my limits, I noticed I had to turn the sound up more and more to hear it, but often times I could hear it.
Yeah it's annyoing. I turned my sound more as well and I still couldn't hear it. Damn it
But I do think my ears are just fine. I normally hear cars, electronic devices while most people can't hear it. I have to focus on it though. It's not like it's super loud orso
28 Jun 2013, 6:31 pm
I just did some more fiddling around with the sine-wave mode,
I could hear the sound very well at 19,150 Hz.
I didn't hear anything above 20,000, but I'll take 19,150... that's pretty awesome, and higher than I thought! At that frequency though, the tones all start to sound the same; I wonder if the generator is defective?
Also, I think I did hear some sound way down around 1-2 Hz. The trick was to increase the duration of the clip... the longer it lasted, the more I could detect the variation in the cycle.
1 Hz I don't know about, but I'm almost positive I was hearing something at 2 Hz, and I could absolutely hear something by 4 Hz. This was all sine-wave.
I think it makes sense that human ears would be more sensitive to some frequencies than others, even within our hearing range. In fact, there may be "holes" or "islands" in the range, so this time I made sure to test at frequencies I'd never bothered to try previously because they were way outside the range.
So, I don't know if I can edit my vote, but the low range of my hearing is "superhuman" according to this tool, and my high range is at least above the adult maximum if not completely above the record human maximum.
28 Jun 2013, 6:36 pm
But I do think my ears are just fine. I normally hear cars, electronic devices while most people can't hear it. I have to focus on it though. It's not like it's super loud orso
Me too! I can always tell when someone left the TV turned on with no input, even from another room. I did that at the dinner table once and freaked out my parents.
The TV was silent, all you could hear was the charging of the electron scanner (it was a CRT), and the frequency was extremely high.
About as high as what I'm hearing right now. I gave myself tinnitus again, rofl.
At least I know it will go away.
Thanks for the feedback and pointing all that out!
28 Jun 2013, 6:50 pm
