Problem Room

cameronthomas · 5th April 2011

I'm trying to figure out how to acoustically treat and where to place my monitors. The room has lots of issues. It's 12' x 12' 2" x 7' 10". 3 out of the 4 corners where the walls meet have obstacles. The door and 2 windows. Unfortunately the only room I have to work with right now is my bedroom so I also have a queen bed in the mix. The room will be used mainly for production so I'm not looking for perfection. I just need to be able to hear what I'm doing. More specifically I need to be able to hear the difference in lower frequency bass notes which in the past has been a big problem due to working in untreated rooms. I'm including a diagram of the room. Any help or suggestions would be appreciated.

Jens Eklund · 5th April 2011

1. Learn how to make measurements: REW - Room EQ Wizard Home Page
Don’t do anything without measurements.

2. Find the best position. Usually centered up against a short wall, is the best place to start. Confirm with measurements. If the room is big, you can experiment with a position away from the wall but then usually more than approx. 1,5-2 meters from it (speakers).

3. Identify and treat your modal and SBIR related issues and educate yourself about different bass-absorbing techniques.

4. Treat areas that otherwise causes early reflections.

5. If the room is big enough, add diffusers (but read up on how to use diffusers before going nuts).

Always base your decisions regarding different treatment, on measurements. Avoid thin (less than about 4") porous only absorbers (including wall to wall –carpet, drapes etc.) unless a measurement indicates the need for it. There are many informative threads lying around; find them.

Glenn Kuras · 5th April 2011

I would face the upper wall in your drawing and put the bed in the back corner. For the front corners you could mount bass traps in right corner and use stands for the other corner. Also use stands for panels for the left early reflection point.
What Are Early Reflection Points. Spotlight on Bob Ebeling - Reflection Studio. GIK Acoustics Articles and Newsletters.
Beyond that you need thick absorption on the back wall and bass trapping in corners. Don't forget that upper corners where ceiling and wall meet and lower corners where floor and wall meet work also.
GIK Acoustics: Room Setup

Quote:

3. Identify and treat your modal and SBIR related issues and educate yourself about different bass-absorbing techniques.

Learn what is SBIR (Speaker Boundary Interface Response).

cameronthomas · 6th April 2011

Thanks a bunch guys. I've been reading up treatment here and other sources for a little bit and have a decent grasp on what I need so now I just need to learn more about the science behind it so I can understand where, how and why. Thanks again.

5th April 2011	#1
cameronthomas Gear interested Joined: Apr 2011 Posts: 2 Thread Starter	Problem Room I'm trying to figure out how to acoustically treat and where to place my monitors. The room has lots of issues. It's 12' x 12' 2" x 7' 10". 3 out of the 4 corners where the walls meet have obstacles. The door and 2 windows. Unfortunately the only room I have to work with right now is my bedroom so I also have a queen bed in the mix. The room will be used mainly for production so I'm not looking for perfection. I just need to be able to hear what I'm doing. More specifically I need to be able to hear the difference in lower frequency bass notes which in the past has been a big problem due to working in untreated rooms. I'm including a diagram of the room. Any help or suggestions would be appreciated. Attached Thumbnails

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5th April 2011	#2
Jens Eklund Lives for gear Joined: Oct 2009 Location: Stockholm Posts: 3,008	1. Learn how to make measurements: REW - Room EQ Wizard Home Page Don’t do anything without measurements. 2. Find the best position. Usually centered up against a short wall, is the best place to start. Confirm with measurements. If the room is big, you can experiment with a position away from the wall but then usually more than approx. 1,5-2 meters from it (speakers). 3. Identify and treat your modal and SBIR related issues and educate yourself about different bass-absorbing techniques. 4. Treat areas that otherwise causes early reflections. 5. If the room is big enough, add diffusers (but read up on how to use diffusers before going nuts). Always base your decisions regarding different treatment, on measurements. Avoid thin (less than about 4") porous only absorbers (including wall to wall –carpet, drapes etc.) unless a measurement indicates the need for it. There are many informative threads lying around; find them.

6th April 2011	#4
cameronthomas Gear interested Joined: Apr 2011 Posts: 2 Thread Starter	Thanks a bunch guys. I've been reading up treatment here and other sources for a little bit and have a decent grasp on what I need so now I just need to learn more about the science behind it so I can understand where, how and why. Thanks again.