On Sun, 13 Aug 2006 21:59:35 +0100, "Malcolm Stewart"
wrote:

"Don Pearce" wrote in message
...

Just make sure the dimensions aren't
all the same - that will pile up the problems.

www.pearce.uk.com/papers
d
Pearce Consulting
http://www.pearce.uk.com

It certainly did!
The lounge in my first flat was a 10' cube. And that was where I built (a
pair) and tried to listen to the Bailey transmission line loudspeaker. In
some positions, hum was quite a serious problem.
Fortunately I moved after a short period to a house with a lounge with a
more sensible set of dimensions.


Interestingly the peaks of sound are only slightly raised above normal
level - it is the dips that are the big problem, with some frequencies
almost vanishing at some points on the room. If you had a hum problem
at some positions, you had a hum problem, full stop. Just at many
places in the room you couldn't hear it.

Playing a low frequency sine wave is always a revealing way of
assessing a room. Just play it and walk around - very depressing in
99% of rooms.

d

--
Pearce Consulting
http://www.pearce.uk.com