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Audio Diffused and Muffled in Large Room

post #1 of 10
Thread Starter 
So my parents have just built a cottage with a very large main room (containing the kitchen, dining room and sitting area).

The sitting area also houses the television, HTPC and sound system.

We are having a terrible time with audio. When watching a movie or TV show, it is very difficult to understand what is being said. It has become so bad that very often the subtitles will have to be turned on to understand what's happening.

The room is about 35x20 feet with a cathedral ceiling peaking at about 30 feet. The material on the ceiling is wood (pine). There is a balcony with small office area above.

The audio seems to be going straight up bouncing off the ceiling instead of going towards the sitting area.

We cannot modify the material of the room.

At the old home, the television's built-in speakers were fine (it's my parents, not me) and that was enough for them. I've since switched them over to a fairly decent, but older, Bose system with 2 small bookshelf speakers providing audio.

In other environments, the sound is crystal clear, so it's definitely environmental.

Are there any suggestions for something along the lines of directional speakers or the like for such a situation? I would prefer to not have to resort to a set of headphones for all viewing parties.
post #2 of 10
I think your idea to go with directional speakers is the right one. In order to have decent directional control down into the vocal region, you'll need fairly large drivers and/or fairly large horns. Unfortunately that's likely to be neither cheap nor unobtrusive.
post #3 of 10
Take a look at horn speakers - such as Klipsch or HSU bookshelves.
Also, Tweak City Audio has something new.
post #4 of 10
I suspect that the muffled sound is the result of reflections. Check placement and make sure the center isn't mounted so far back that it's reflecting off a table top or bare wood or tile floor. If it is expect mumbles. If necessary relocate the center a bit or put down a throw rug.

If that fails then I have to agree with the others and say go with something very directional. I'm not a big horn fan but this is a job for horn loaded speakers. As someone else suggested Klipsch or Hsu HB-1 bookshelves are something to consider. But I'd get them from some place with an easy return policy just in case.
post #5 of 10
I suspect very high reverberation times along with seating distances way to far for the current speakers and likely other installation problems. Dialog intelligibility is adversely impacted when the reverberant (non-direct) sound overwhelms the direct sound ... very common in "cottage" and "loft" spaces. This TV is not in an entertainment cabinet is it?
post #6 of 10
Also, make sure you have the speaker wires plugged in correctly. If they are crossed, you will get a diffused sound from them.
post #7 of 10
Thread Starter 
@ DukeL and zieglj01
I was afraid you were going to agree with the directional speakers. :P

@Sholling
There actually is no center in this setup; it's just a pair of Bose bookshelves at the moment. The receiver is an older Bose stereo system supporting just 2.1. Hasn't been a need for more than that for the parental figures. I imagine it is indeed placement of the speakers, but unfortunately the whole room is a reverberation nightmare; both ceilings taper to a point so there are two 45 degree reflecting surfaces of pine covering about 65x25 feet in total area.

@Dennis Erskine
No, it is not in a cabinet. It sits on a small table in the corner (42" TV).

@shivaji
I'm fairly certain that's not the issue, as the problem was also occurring with the internal speakers from the TV, but I will check.

I'll have a look at the prices on those speakers you folks recommend and see what the can do. I appreciate the advice. any further suggestions are welcome.
post #8 of 10
Quote:
Originally Posted by DrewSalter View Post

There actually is no center in this setup; it's just a pair of Bose bookshelves at the moment.

Some Bose bookshelf speakers were of the direct/reflecting variety. Couple those with a hughly reverberant room and the indirect/reflected sound will ovewhelm and smear the direct sound. More directional speakers and a closer seating position are the only easy remedies outside of acoustic treatments.

While full-on acoustic treatments may not work in your situation, some regular old "aesthetic" treatments can be made useful for acoustics. Area rugs on the floor, draperies, fabric wall treatments, fabric furniture covers, etc., can all help to reduce the over-reflective sound in your room.

Craig
post #9 of 10
Quote:
Originally Posted by Dennis Erskine View Post

I suspect very high reverberation times along with seating distances way to far for the current speakers and likely other installation problems. Dialog intelligibility is adversely impacted when the reverberant (non-direct) sound overwhelms the direct sound ... very common in "cottage" and "loft" spaces.

That's the right answer I think. Any chance you can add acoustic treatments to the space? You could always try just sitting closer. You'll probably have to do one of those things though. I don't think that changing speakers is going to have a big impact.
post #10 of 10
Reducing the vertical dispersion will help, and a horn is one way of doing that. The other is to pick a speaker that uses a vertical array that's midrange/tweeter/midrange. It will have a narrower vertical dispersion pattern, and that will work better than the more hemispherical radiating pattern of a traditional two-driver 2-way.
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