My room is 14 by 23. My speakers will definitely be on the 14 foot wall firing down the length of 23 feet. The right wall HAS A 6 foot wide by 3 foot high window I Can SAFELY ASSUME the window may well be within the first reflection point on the RIGHT SIDE. I currently have this window covered with a "MOVING QUILTED PAD. It hangs over the drywall sill as the actual window is about 3 inches in from the sill. Should this area be covered completely with absorption panel or JUST the area where the reflection point resides? And if so, leave rest of area glass OPEN 'as is' or should the Quilt stay over the whole window and put the ACOUSTIC PANEL OVER IT - within a certain dimension of the reflection point? And what and how large should that panel be, whether just covering reflection area with or WITHOUT THE QUILT covering the window? (If the answer is to cover the reflection point without the window quilt covering leaving the rest of the window uncovered....how big should it be....)
Can you draw a diagram of the floor plan? Dimensions and speaker and seating location should be shown. If you look at the plan, you will imagine or can even draw the sight lines from the speakers to the wall bouncing off to the seating area or spots... like a billiard ball. A four foot wide absorber should be wide enough for one listening seat, If you have a larger listening/seating area, your absorber may need to larger.
I think you might need to sign in. I see you are posting as a guest so to use other features like add attachments etc. you probably need to become a member and sign in. I notice that if I don't sign in, I can read posts but can't view attachments full screen.
Document listening room.pdf (11 KB) Here is the attachment for the diagram of the listening room. Window on right side in middle of 8 foot cieling. it is 6 ft wide by 3 feet high. At moment I have a Quilted Pad covering the window
Seems that I cant open it from my side?? Hope you can see it
howarda asked "Should this area be covered completely with absorption panel or JUST the area where the reflection point resides?" I would normally recommend a 4x4 foot area centered on your reflection point. Since your window is 3x6, if you filled that in (assuming you don't ever want to look out the window) that would probably be fine. You could also use stands for absorbers so you can move them if you want. I don't think you need the blanket. It won't hurt but I wouldn't bother with it. If you can find a VERY heavy acoustic curtain, that would allow you to look out the window sometimes but if you go that route, you want it long enough in width to have many folds or pleats so it absorbs better. For symmetry, you might want to use the same type and size curtain on the other side but DIY absorbers will be cheaper and possibly work better but the curtains might look better.
Don't forget to consider a cloud on the ceiling. A rug can help too.
So basically...identify the reflection point, then fill it with a four by four foot absorption panel; although a PART OF THE window might be BARE...? AND THEN, use the same absorption panel on the other side? Howard
Yes, that would work but I want to stress that the 4x4 foot number I threw out is in no way a rule. The actual reason is that 2 2'x4' panels can be put together to make a 4x4...and yes it is a good size. In your case, from your drawing, it looks like the reflection point is pretty close to the center of your window so if you like the idea of covering the entire window, that should work too. And then, copy that on the opposite wall.
You seem to be concerned about your bare window. You shouldn't worry unless you don't think it will look OK. IIRC, window glass, is not that much different than drywall. Here is what Ethan says about surfaces. realtraps.com/art_surfaces.htm
I didn't mention, but you should know that spacing an absorber panel off the wall will improve LF performance. If your panels are 4" thick, spacing them the same 4" will increase their efficacy down one octave. Actually doubling the effective thickness pretty much always extends an absorber down one octave.
This was quite helpful. I will proceed to buy some acooustic panels for reflection points. ALSO-- I have just set my system up INITIALLY...and am listening, as is (window covered as above) I have CLOSE to the Cardas room placement set up for my OLD Spendor BC1's. The Room is 23.5 by 14 and have speakers 4 feet from back walls, approx 4 feet from side walls. I sit about 12 to 13 feet away/ Everything sounds better than I ever thought, imaging could be a TOUCH SHARPER, but will experiment with my listening distances. HOWEVER...I "seem" to think that the sound now while spacious and deep and nice, MAY...be, on well recorded PIANO... a "touch" dull on high frequencies?? NOW-- the room is carpeted, medium thickness and padding. Am wondering....if maybe, the carpeting should have been limited to the first half of listening room? Or would it be better to get that first reflection point covered before further evaluation? (I read a thread years ago by Ethan to buy some cheap plywood and cover the area around speakers and towards listening seat... any thoughts would help.