Does a flat ceiling provide the best sound?


I have heard that flat ceilings in homes are superior than a peaked ceiling for acoustics.  Is this because there is less space for sound waves to develop and reflect back down?  I'm thinking of the more shallow peak of a four-season addition that is fairly low and simply follows the roof line, not so much the steeper vaulted ceilings in living room/dining room/kitchen floor plans.  Would some rug hangings or similar help correct this in a shallower peak?  Thanks!  
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It's not so much the space, but the reflection trajectory. Sound can come up, reflect, reflect, and come back down.

However, good acoustic treatment is essential regardless, so if you are that serious, I would talk to GIK Acoustics and treat the ceiling appropriately.

Best,

E
Yes. In general ceilings between 8 to 12 feet high work best. The problem with very high ceilings is that it usually results in the room being more of a cube and much worse for room modes and slap echo.

Concert hall shape is best - rectangular shape layout with speakers on short wall and greater length than width and a lower ceiling at the stage and rising modestly to the rear.

If height to width, width to length are in golden ratio then that is close to ideal
flat ceilings are worst by far
 they create standing waves and hence huge bass peak frequencies
( bass boom)  and reflect high frequencies back down to the listener smearing the sound stage and timing
 go for a pitched roof  or if a flat ceiling break up the smooth surface
Speakers are designed with an 8ft flat ceiling in mind.  Anything else requires adjustments and compromises
good info above - flat ceilings are much easier to deal with in terms of calculations and empirical treatments; the same is true for rectangular walls vs. trapezoids 

read more in the Master Handbook of Acoustics

no matter what, I predict you will wind up with some pads up in the corners of the ceiling & 2 walls
I agree with Erik. I have a 9' ceiling and  treated the corners with ACS tube traps, back and front walls with various diffusers, 1st reflection points with smaller tube traps and GIK diffisers. Room, soundstage, imaging, music is superb. But the reflection from ceiling is very noticeable to me now.
Had back surgery and am just waiting to get my balance fully recovered so I can install the ceiling panels recommended by Nick at GIK. Very good people and laser recommended by "Jim Smith; Get Better Sound" was/is an indispensable tool in a 107yr old house. Or for Speaker setup Period!!! 
I am an field engineer for 40yrs. Have plenty of steel tapes and am used to accurately measuring. The laser will put the tape to "shame" and make it (3) times easier.

Best to All on this Journey 

I have 16 ft ceilings (though flat) and it was a nightmare to adjust for good sound.
Great advice--interesting to hear that speakers are designed for ceiling heights of around eight feet--will have to keep that in mind.