Recording below 300 hz

[lesaint]

A psychic friend of mine, as ask me for information about recording
onto his laptop, sound frequency of 300 - 500 hz ,this as you will
know is below human hearing capacitiy and is the frequency, "so say the psychic world say " of ghosts. Im a mere C++ programmer and this is beyond my knowlege, So thanking you in advance for any input ....

[TheJudge]

I don't know anything about ghosts, but I do know that I can hear 300-500Hz perfectly fine.

[AudioFreak]

Most humans with decent hearing can hear down to around 20Hz.

[Cal Weldon]

Hear 20Hz?

Maybe when you were 12.

Cal

[pinkmouse]

Originally posted by Cal Weldon
Hear 20Hz?

Maybe when you were 12.

Are you thinking of 20KHz? It's the top end that goes with age...

[audio-kraut]

300 - 500 hz ,this as you will

Where did you get this info from? Check with google under frequency range of the human ear - and the corresponding curves of sensitivity.
Mine ranges comfortably at the ripe age of 55 from 30Hz to app. 14 kHz.

[audio-kraut]

if "psychics" perpetrate such nonsense - doesn't speak to well for their
"investigations", as the indicated frequency range is comfortably in the range of the human voice - get my drift??

[Enzo]

300-500 ought to come over the telephone even. That isn't even a solid bass note. That is higher than middle C on a piano. The hum you hear when your audio systems are not well grounded (earthed) is 50 or 60Hz, and you can sure hear that, even when you don't want to.

So to answer the question, ANY audio recording technique should capture that range easily.

[djQUAN]

..........or maybe he was talking about 300-500kHz?

[bremen nacht]

Originally posted by djQUAN
..........or maybe he was talking about 300-500kHz?

Maybe - but as higher frequency sounds are attenuated more rapidly by air, a ghost would have to have a bloody healthy set of lungs and/or sensitive, low-mass eardrums to make themselves heard.

If I was a ghost I'd just clank some chains, or go 'Woo!' at about 200Hz.