Are you old?

[vbloke]

Most humans are born with the ability to hear frequencies from about 20 Hz (low) up to 20,000 Hz (high) but that range shrinks as we get older.

See how bad your hearing is: http://www.ochenk.com/entry.php?id=63

I got up to 18,000Hz

[Aardvark]

13K, pah >:(

A lifetime of Pink Floyd has done me in ( age 46)

[median]

Got to 20k but could also just hear 21k

[tkingdoll]

16 for me. My ears probably need a candling :D

[median]

I bet you are hopi to know that :D :D

[Hazen]

Pardon?
Did somebody say something?

[Mojo]

I got to 16k, which isn't too bad for mid 40s, I guess.

[Admin]

I got to 15K - there's obviously something wrong with my speakers.

I'm 42 btw ??? My avatar was taken a while ago

[Admin]

Just as I thought it was the speakers on my laptop.

I've tried it on my main PC and I can hear the 16,000Hz one but I'm not sure about the 17,000. I had it on full blast to give myself every chance (as if it defies age ).

[Mojo]

Just as I thought it was the speakers on my laptop.

I've tried it on my main PC and I can hear the 16,000Hz one but I'm not sure about the 17,000. I had it on full blast to give myself every chance (as if it defies age ).

Tried it (very cautiously) with some reasonable headphones instead of the speakers on the PC: could just hear the 17k one.

[Mojo]

By the way, the cat left the room.

[Admin]

By the way, the cat left the room.

I've just finished chiseling mine off the ceiling!!!

Actually, I seem to remember a pair of psychic children fooling their testers as they were using dog whistles to communicate with each other, and of course the testers were too old to hear the high frequencies.

[Mojo]

Actually, I seem to remember a pair of psychic children fooling their testers as they were using dog whistles to communicate with each other, and of course the testers were too old to hear the high frequencies.

There was a link posted over at JREF for a story about another use for high frequency sounds: http://www.npr.org/templates/story/s...toryId=5434687

Note that it also talks about teenagers using the sounds to communicate without their teachers catching on!

[tkingdoll]

Note that it also talks about teenagers using the sounds to communicate without their teachers catching on!

I am very skeptical about that story, as by far the majority of posters of every age could hear that particular frequency, it's unlikely that all teachers could not.

[vbloke]

I was also concerned because I don't think that mobile phone speakers are that capable of reproducing sounds to that degree - you need a decent set of speakers to hear the higher end frequencies and most mobiles I know of sound really awful when they ring.