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Ethan Winer · 10th January 2007

Tim,

> what would you suggest I do for size versus height. <

See this page on my company's site:

www.realtraps.com/modecalc.htm

Besides the detailed explanations, there's a Windows program you can download, which lets you experiment with various dimensions to see how the modes are distributed. Your main goal is to distribute the room resonances evenly, though having a larger room is useful generally, and that reduces the importance of having "good" mode spacing. In a shell that large you're already starting off a lot better than most folks.

I also feel compelled to point out that there's a huge amount of misinformation and outright bad advice about room modes all over the 'net. So be wary of what you read from so-called "experts" in forum posts. Other than my expert forum posts, of course!

> Will I need to trap the ceiling with panels? <

At 13 feet high the problem of early reflections and comb filtering are not as severe as with a lower ceiling. But you'll still need a fair amount of absorption up there for a few reasons:

1. Overhead microphones above a drum set will still be close enough to the ceiling that reflections are considered "early" and thus damaging.

2. With a reflective floor, which you probably should use, you need absorption on the ceiling to avoid flutter echo.

3. The ceiling is a good place for general broadband absorption because it's up and out of the way, and careless/drunk band members and their roadies won't bang into it. tutt

--Ethan

10th January 2007	#5
Ethan Winer Gear Guru Join Date: Oct 2002 Location: New Milford, CT, USA Posts: 12,037	Tim, > what would you suggest I do for size versus height. < See this page on my company's site: www.realtraps.com/modecalc.htm Besides the detailed explanations, there's a Windows program you can download, which lets you experiment with various dimensions to see how the modes are distributed. Your main goal is to distribute the room resonances evenly, though having a larger room is useful generally, and that reduces the importance of having "good" mode spacing. In a shell that large you're already starting off a lot better than most folks. I also feel compelled to point out that there's a huge amount of misinformation and outright bad advice about room modes all over the 'net. So be wary of what you read from so-called "experts" in forum posts. Other than my expert forum posts, of course! > Will I need to trap the ceiling with panels? < At 13 feet high the problem of early reflections and comb filtering are not as severe as with a lower ceiling. But you'll still need a fair amount of absorption up there for a few reasons: 1. Overhead microphones above a drum set will still be close enough to the ceiling that reflections are considered "early" and thus damaging. 2. With a reflective floor, which you probably should use, you need absorption on the ceiling to avoid flutter echo. 3. The ceiling is a good place for general broadband absorption because it's up and out of the way, and careless/drunk band members and their roadies won't bang into it. tutt --Ethan __________________ Ethan's audio book is coming!