I recently have fixed a room such as the one you describe.You probably have a foam pad under your carpet. Replace the foam pad with a natural fiber pad. The panels can be made to look like large eyebrows high up on the wall behind the speakers. They can be designed to follow the angle of the roof line and can be covered with cloth to match the painted wall. You can do much the same for the rear panels as well. These panels need to be about 6ft in height and 24 to 36 inches in width, the bottom of which should be placed slightly above the television that is compounding your problem. Better than fiberglass is natural longhair carded wool. The wool is much more linear in its absorption rate than fiberglass..Wool has less suckout and will give you smoother overall response. The problem is on your walls and not your ceiling. The problem is above 4 ft and beyond. Tom
Guidelines for treating cathedral ceilings
My listening room is 18' wide x 18.5' deep, with a cathedral ceiling symmetrically over the room.
I have done the 'standard' room treatments (absorption behind the speakers and listening seats, and absorption at the first reflection points on the side walls). Absorption is 2" thick Owens Corning 703 fiberglass.
However, I am still hearing a sharp slap echo when I clap my hands in the room. I am beginning to suspect some sort of ceiling or upper corner interaction. Is there any rule of thumb for where to first start with a treating a cathedral ceiling? I am a little bit surprised, since the ceiling is angled and does not present two parallel surfaces for sound to bounce off of.
The practical concern is some sibillance when playing certain CDs at high volumes (possibly exciting something in the room and exaggerating the treble?).
thanks in advance,
Bill
(I hope this drawing comes through OK- the A is the top of the ceiling, and the two S are the speakers).
.......................A
.................... /....\
................./.............\
............../...................\
.........../..........................\
...........|...........................|
...........|...........................|
...........|...........................|
...........|.....S...............S.....|
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I have done the 'standard' room treatments (absorption behind the speakers and listening seats, and absorption at the first reflection points on the side walls). Absorption is 2" thick Owens Corning 703 fiberglass.
However, I am still hearing a sharp slap echo when I clap my hands in the room. I am beginning to suspect some sort of ceiling or upper corner interaction. Is there any rule of thumb for where to first start with a treating a cathedral ceiling? I am a little bit surprised, since the ceiling is angled and does not present two parallel surfaces for sound to bounce off of.
The practical concern is some sibillance when playing certain CDs at high volumes (possibly exciting something in the room and exaggerating the treble?).
thanks in advance,
Bill
(I hope this drawing comes through OK- the A is the top of the ceiling, and the two S are the speakers).
.......................A
.................... /....\
................./.............\
............../...................\
.........../..........................\
...........|...........................|
...........|...........................|
...........|...........................|
...........|.....S...............S.....|
............ --------------------------