Is room size better? 10x12 vs 16x25 ?

[Ethan Winer]

The larger room is vastly better than the smaller room. More useful advice here:

Acoustic Basics

--Ethan

The Acoustic Treatment Experts

[Glenn Kuras]

Would the screen at the front of the room cause an issue? The front of the room is where the speakers would be with the screen behind them.

The screen is going to be the last thing to worry about. I would spend a bit more time getting up to speed on how room acoustics work before jumping in with both feet. You can start with the following primer. The second link has a bunch of videos that talk about room treatment in general.
Room Acoustics Primer - GIK Acoustics
Educational Videos - Acoustic Panels | Bass Traps | Diffusors | GIK Acoustics

BTW yes a larger room is always better. The only draw back is it might cost more due to more over all square footage, but in the end will yield a better room.

[mczx]

Originally Posted by Ethan Winer

The larger room is vastly better than the smaller room. More useful advice here:

Acoustic Basics

--Ethan

The Acoustic Treatment Experts

Thanks, I have been reading many of these articles to gain a basic understanding.

[mczx]

Originally Posted by Glenn Kuras

The screen is going to be the last thing to worry about. I would spend a bit more time getting up to speed on how room acoustics work before jumping in with both feet. You can start with the following primer. The second link has a bunch of videos that talk about room treatment in general.
Room Acoustics Primer - GIK Acoustics
Educational Videos - Acoustic Panels | Bass Traps | Diffusors | GIK Acoustics

BTW yes a larger room is always better. The only draw back is it might cost more due to more over all square footage, but in the end will yield a better room.

Ok understood. Yes I have been reading/watching those acoustic primers and its above the minimum recommended cubic footage.

[jim1961]

16x25

[Syncamorea]

What is the height of the 16x25' room? If it's 8' that's a bit of a bummer since 2x8=16 and 3x8=24 and that's not ideal for modal distribution. Regardless, I spent a fiar bit of effort treating a 15.5 x 23' control room and it was a joy once it came together.

[mczx]

Originally Posted by Syncamorea

What is the height of the 16x25' room? If it's 8' that's a bit of a bummer since 2x8=16 and 3x8=24 and that's not ideal for modal distribution. Regardless, I spent a fiar bit of effort treating a 15.5 x 23' control room and it was a joy once it came together.

My actual measurements came in differently, it's posted in another thread.

I have a home theater room that is 278.5" Long / 170" Wide and 95" high.
It is more than the recommended 2500 cubic feet. 23.21 ft long 14.17 ft 7' wide 7.92' high

It was not as bad as 16 and 8 exactly. Slightly under 8' high and well under 16' wide.

Can you list what treatment you did, the cost and if any measurements were done pre and post? How would you describe the improvement if no measurements were done?

I have decided to dual purpose the room "rationalizing" that the money spent on making the audio good for recording, will also help the home theater the same way.

[Syncamorea]

Originally Posted by mczx

Can you list what treatment you did, the cost and if any measurements were done pre and post? How would you describe the improvement if no measurements were done?

The room had horrible flutter echo, so dealing with that was the first order of business, just to be able to hear what the next worst problem was. So I threw up a bunch of home-made tube traps that were later replaced with broadband absorbers covered with slats.

The room was measured numerous times during the process. Most of the empty-room modal behavior looked predictable and the stuff that didn't make sense may have been due to the room having a cathedral ceiling. It was ~9' tall at the back wall, rising to a bit over 11' at the peak, then down to ~10' at the front wall. The room had a really long decay when measured empty, possibly due to the cement floor and rigid walls, with no windows on the long walls, none on the front wall and only a metal door on the back wall.

Eventually, the front wall was treated to about 80% coverage with deep broadband traps. A cloud was hung and it probably had too much absorption initially. The home-made tube traps were redistributed and the room was getting fairly dead but was sounding much better. At this point, we did some extensive testing and found that a mode in the ~45Hz range was the major LF problem. The owner wanted a couple of Helmholtz absorbers built, so I built a couple that were ~30 cubic feet each. Those had little effect on the mode, so next I built two that were about 200 cubic feet each and spent much more time fiddling with the tuning and eventually, they did the trick. We spent quite a bit of time working on rear wall diffusion at that point and people started smiling.

I then tweaked by adding slats to about 60% coverage on the broadband traps and ~40% on the cloud. Additional devices (abfusor style) were built to go behind the monitors as a final tweak. Unfortunately, I no longer have any of the photos or measurement data. The PC I had them on was killed by a lightning strike and the only other copy was deleted when the owner sold the property. The waterfalls looked good but I don't think they would blow you away. Likewise, the ETC was nothing to write home about but no major problems were seen in it.

[jim1961]

Originally Posted by mczx

23.21 ft long 14.17 ft 7' wide 7.92' high [/B][/I][/I]

That is about the size of my room which is 25.75 ft long, 15.5 ft wide, but with a vaulted ceiling that is 7.5 ft high on the ends and 8.75 ft high in the middle. Your length to width ratio is very close to the golden ratio of 1.62 to 1. So your ceiling I expect to cause the most problems.