PrinceGaz wrote:
> We have two ears, a left and a right ear, so what advantage can be
> gained by using more than left and right speakers / headphones?
I think we can all accept that 2 transducers (ears) are enough to perceive a
3 dimensional sound field, but I'm fairly sure that 2 speakers will only
ever reproduce a 2D field, with all the apparent sources on a line joining
the centres of the speakers, combined with a field of anti-sources coming
from everywhere else EXCEPT on the line, caused by reversed phase signals.
You can test this yourself by playing a mono signal into your stereo, and
turning the balance knob, which will move the apparent source along the line
from one speaker to the other, and never anywhere else. Next, reverse the
connections of one speaker (turn off first or accept the consequences when
you short the wires), and try it again. I hasten to point out I haven't
tried this myself yet, but I understand the sound's location becomes very
difficult to determine, so I call this an anti-source. It seems plausible to
expect that adding another speaker would allow you to create apparent
sources anywhere within the triangle with its vertices at the speakers.
Another speaker would then allow the source to be within a tetrahedron etc.
> I know I'm gonna get humiliated by asking this but I can't hold off
Surely you're used to it by now ?
simon
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