[Christof]

I will soon be moving into a loft I've developed.  I will have an open room with a slightly pitched 14ft ceiling that tapers to 12' on the far end, 22ft wide and 48 ft long.  The speakers will be oriented such that they throw sound down the length of the room.  One side (length) will be sheetrock the othe wall (length) will be exposed brick.  The brick is not uniform, some bricks protrude as much as 1" further than other bricks. Maple hardwood floors throughout.  

Can you acoustic guys tell me what sort of standing waves to expect?

What sort of effect will the two dissimilar wall materials (rough brick & finish drywall) have?

Thanks
Christof

[Dusty Chalk]

Actually, the asymmetry will be a bigger problem.  One side will be more reflective than the other, your biggest challenge will be treating them with enough treatment to make them symmetrical.

On the bright side, your room is superior to most in the standing wave front (sorry for the pun).

[Ethan Winer]

Christof,

> 22ft wide and 48 ft long <

Wow, that's really big. The good news is a large room has fewer problems with bass than a small room. The bad news is you have so much volume that you'll need a lot more bass traps and other treatment to tame it.

> One side (length) will be sheetrock the othe wall (length) will be exposed brick. <

I don't see a big problem with slightly dissimilar surfaces on the side walls. It would be more of an issue if one side were highly reflective and the other side was open or much less reflective. Once you treat the first reflection points on both sides with absorption, that alone will make the two walls "acoustically equal" where it matters.

--Ethan

[Christof]

Thanks for the input, guys.  I will be posting more here as the loft approaches completion by then I'll know better where I stand $$ wise for acoustic treatments.  Regardless I'll be going DIY since there is such great info around here.

c.

[nathanm]

Wow, 22x48...all sorts of room for those bass frequencies to 'breathe'.  But it will obviously be more reverby in exchange.  Personally I would rather deal with large room upper frequency reflections than with small room low frequency ones.  Knocking down slap echo and pings isn't all that expensive, comparatively speaking.   I'd like to see pics of this giant room if possible.

[fajimr]

I will soon be moving into a loft I've developed.  I will have an open room with a slightly pitched 14ft ceiling that tapers to 12' on the far end, 22ft wide and 48 ft long.  

this is a bit like th 'other' apartment I was looking at (re: "how small is too small') although not a loft and not quite as large.

How do you take into account things like furniture, kitchen appliances, cabintry, dining room tables, small alcoves off to the side (2/3 towards the back).  How much influence do these objects have in reflecting and abosrbing waves???

or do you still just bass trap the corners and first reflection point and then go from there??

[Christof]

If I were to suspend a curtain across the width of the large room, a bit behind the primary listening position, would this function to stop sound from bouncing off my back wall?  If so what would be an ideal material to use without costing a fortune?

Thanks
Christof

[Ethan Winer]

Christof,

> If I were to suspend a curtain across the width of the large room, a bit behind the primary listening position, would this function to stop sound from bouncing off my back wall? <

Only at the very highest frequencies. That will do nothing to control bass boominess or any other issues below a few KHz.

--Ethan