Hi



I am looking for advice on my listening/recording environment re speaker
placement.

The room is 16 ft. X 14 ft. and approximately 9 feet in height. The problem
is one end of the room (16 ft length) has a sloping ceiling which slopes
pretty drastically from 9 ft. to just under 5ft. feet. There are no other
real irregularities with the room. I am using both mid and near field
monitors. I was mostly concerned with the mid fields.



I was hoping to get some suggestions with the best way to deal with the
sloping ceiling problem - I just moved in. Any help would be greatly
appreciated.



Thanks





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On Thu, 5 May 2005 14:04:12 -0400, "M. MacLeod"
wrote:

Hi



I am looking for advice on my listening/recording environment re speaker
placement.

The room is 16 ft. X 14 ft. and approximately 9 feet in height. The problem
is one end of the room (16 ft length) has a sloping ceiling which slopes
pretty drastically from 9 ft. to just under 5ft. feet. There are no other
real irregularities with the room. I am using both mid and near field
monitors. I was mostly concerned with the mid fields.



I was hoping to get some suggestions with the best way to deal with the
sloping ceiling problem - I just moved in. Any help would be greatly
appreciated.



Thanks

What problem? The sloping ceiling is great for sound - at a stroke it
has removed one of the most intractable problems of any room -
floor-to-ceiling standing wave modes. Now you just have to worry about
the walls - but you can just stack irregularly shaped stuff against
them for a cure.

d

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

"Don Pearce" wrote ...
"M. MacLeod" wrote:

Hi



I am looking for advice on my listening/recording environment re speaker
placement.

The room is 16 ft. X 14 ft. and approximately 9 feet in height. The
problem
is one end of the room (16 ft length) has a sloping ceiling which slopes
pretty drastically from 9 ft. to just under 5ft. feet. There are no other
real irregularities with the room. I am using both mid and near field
monitors. I was mostly concerned with the mid fields.



I was hoping to get some suggestions with the best way to deal with the
sloping ceiling problem - I just moved in. Any help would be greatly
appreciated.



Thanks

What problem? The sloping ceiling is great for sound - at a stroke it
has removed one of the most intractable problems of any room -
floor-to-ceiling standing wave modes. Now you just have to worry about
the walls - but you can just stack irregularly shaped stuff against
them for a cure.

d
Books are great for this - a few (or better a load of) shelves along the
walls with randomly-sized hard and soft-backs, gaps to the depth of the
shelves, makes a fine diffuser - and your mates will think you're an
intellectual, too (unless you're a drummer, of course ;o). Avoid having too
many pairs of diffused walls facing each other though, or the room will have
oddly patchy acoustics - if you can afford the books, place 'em opposite
bare/hard wall surfaces so it's not too dead.
I take it the sloping section of roof is where the room fits into the
roof? If so, the long section of parallel floor/ceiling will still be a
source of flutter echoes, if you can get anything to break up the
parallelicity (is that a word? parallelism?) it'll help the room acoustics
no end, and some absorbent trapping on the 5-foot high wall will help tame
the main resonances of the length of the room (it may be necessary to treat
for bass, as the sloping section won't really have a lot of effect at the
very low frequencies, being a lot less than a quarter-wavelength)

Hope that helps,
Dave H.
(The engineer formerly known as Homeless)

(and a real bookworm in spare time)

MM,

one end of the room (16 ft length) has a sloping ceiling which slopes
pretty drastically from 9 ft. to just under 5ft. feet.

A ceiling that angles up from the front to be higher over your head and
behind is okay. So to take advantage of that you'll set up facing the 5 foot
high wall. That said, I'm sure a room that size and shape has other acoustic
problems, like modal ringing and early reflections. Although it doesn't
address angled ceilings specifically, I'm sure you'll find my Acoustics FAQ
useful:

www.ethanwiner.com/acoustics.html

--Ethan

"Ethan Winer" ethanw at ethanwiner dot com wrote in message ...
MM,

one end of the room (16 ft length) has a sloping ceiling which slopes
pretty drastically from 9 ft. to just under 5ft. feet.

A ceiling that angles up from the front to be higher over your head and
behind is okay. So to take advantage of that you'll set up facing the 5 foot
high wall.


I think we need to ask the question... Over what distance does this
decline in height take place? If it was a gradual decent from one end
of the room to the other, we have the makings of either of the often
desirable compression or expansion type ceilings... and depending
on which designer you speak with, as to which end they'd recommend
using.

But I'm envisioning that the OP's room may have this anomaly over just
a few short linear feet of ceiling space... which may add another oddball
angle to the equation.

DM

David,

But I'm envisioning that the OP's room may have this anomaly over just a
few short linear feet of ceiling space

Good point, but we'll never know unless he comes back and tells us!

--Ethan