[sdiy] Dynamics and speakers, was:Advice

[Dave Krooshof]

Ideally it's that same with speakers as with microphones.
You want them to be point sources. Any surface bigger
then the wavelength is hard to control.
There's a sound to your speaker just because it has a size.

Then reverbs are a problem. You want your speaker to point
at you, and not hit the walls, in order to recreate an acoustic
reproduction of another space in your room.
You do not want the characteristic of your room to resonate,
so do not bang on the walls with your sound!

To make a tiny omni directrional speaker with hardly any
mass is "easy". Make a tesla-coil, tune it to 44100Hz or
double. Then do AM on that wave with the output of
your cdplayer/computer/synth. Bigger or smaller sparks
will produce airwaves. This is allready done, and it doesn't
sound that bad at all. Beautiful transients!
Pity about the ozone though.

For a bi-directional (figure 8) speaker I was thinking
of a fairly big spark, on a constant rate, a multiple of
44100 to avoid moire-effect...
Then move this spark back and forth with a magnetic field
driven by your synth.

It might not be that efficient, but it will look hella-cool.

andah... actually... I am serious about the point source bit.
Well, I am serious about the tesla speaker too, but for
different reasons. I'm not trying to be funny, here.
-- 
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groets,

_          >^v<        _

website http://www.dendriet.nl