On 4/30/2010 10:52 AM, Darren New wrote:

> Closer to 10Hz. Between 10Hz and 20Hz, you detect sufficiently loud
> sound with different organs, such as your eyeballs vibrating or your
> sinuses resonating. If you play a tone in that range, you get the
> "spooky" feeling, or unaccountably sad, or mystical feelings, or things
> like that, depending on the frequency.

I know with my headphones (Hybrid canalphones, actually) I can detect 
down to around 10hz, anything lower is inaudible. I designed my 
headphone amp with a ~15hz corner frequency high pass in it's input 
stage (AC coupling, to get rid of any DC bias before feeding the signal 
to the op-amp)

It sounds beautiful, very rich tones.

There is something about a big pipe organ with extremely low registers. 
Occasionally at church they'll pull what I think is the 16' stop, and it 
sounds incredible, there's something about that deep rumble the big 
pipes put out...

-- 
~Mike

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