I have a problem with sound being traped right around where my door is, because of the way the room is made. The sound is traped in that area and goes right through the door. Iv thought about taking the trim of the door frame, so the wall is flush with the door, and putting sound board all around it. Do you think that would help?

This shows the layout of the room and the placement .....

http://i87.photobucket.com/albums/k144/moo...theaterroom.jpg

Okay, Im thinking that you might be referring to lower end sounds such as bass and mid bass.
Relocate your sub so that the wave form doesnt reflect next to the door. Try the other side of the room or even in mid court.
If it is actually highs and vocals that are getting caught, you should look at two things. Thickness and makup of the door and the walls next to it. Chances are its an interior door. Luan always seems to make it to the basement...

Consider drilling and filling the walls with pour insulation and then filling the door. Solid door? Try weather stripping...

You probably want to give us some more details about exactly what you are trying to prevent. It could be that you dont need to do these things just change a few other things...

So waht EXACTLY are the symptoms you want to suppress?

Well.....its the high and mids that im having trouble with. As you can see in my "drawing" that the front right speaker is almost right infront of that wall next to the door. I can hear it just fine, but the sound also bounces of that wall and goes right through the door. If i get some of that sound obsorbing foam, that looks like an eggcrate mattress, and put it on that wall, do you think that would help?

Oh, yeah its an interior door. The old kind, i think its thick panel on a wood frame.

Yes, it looks like you would get half cone bounce off the wall facing the speaker. By the angle of the door and the position of the speaker, that wall would indeed shoot half the cones mids and highs right out the door. Probably creates a slightly jittery effect with the soundstage too.

First things first...
1. Can you move your speakers in a little to compensate for the majority of the bounce?
Yes? Great! that will take care of about 60 percent of it. Then a natural fiber wall hanging shoulf take care of the rest. You will want to put it on the opposing wall. To test the theory, try a piece of carpet first...

No? Try the carpet anyway. If it works the go with the wall haging, but place a sheet of light density foam behind it for more absorbing.

Actually, to hell with it! Carpet the entire room in bright red shag, including the ceiling and door! Very "2001"..

One last question....and I KNOW this a pain...

Can you swap the screen and the fishtank? If you did that then you would have symetrical echo paths down the walls until you got to the spot where the surrounds take over and then it wouldnt matter as much. It might not help a lot, due to bounce, but the path would be easier to tune because its symetrical...

SJ

well....to put it simply, no, no and no. Its a painted screen, and that as close to the screen as the mains will go. The fish tanks.......ha......ha, that wall consists of two 55g and one 30g. Just moving the 30g took 5 hours.(have to do i carefully)(its the green spotted puffers) And the two 55s...there just plain dam heavy. (water weighs 8.7lbs a gallon)

hehe...at least i have a sturdy floor.

But, im gonna try the carpeting. And i'll get a solid door, That just might work.

In many ways sound is similar to light. You could try vertical slats angled so that the sound is reflected back into the room instead of out through the doorway. Cover both sides with carpet or some other form of sound deadener.

DJ

Edit:
Or just close the door.

Actually, water weighs 8.34 pounds per US gallon, but you will find statistical variance in every book of measurements...

I say try the carpet first...

But that "close the door" idea...Brilliant!

Everywhere i looked it says 8.7. ....Haha...close the door.

I thought it was 7#'s a gallon. Ha shows what I know.

How much does a gallon of Water weigh?

Seems to be a bit of variation on this, but we always used the 8.34 weight.

But I digress, so have you tried buffering that area yet? Anything to report?

I put 1/4 MDF and a thick blanket all over the door. That helped ALOT. Ugly...... though it will do for now, im gonna invest in a solid door later on, with some of that obsorbing foam.

It was about 1:30 in the morning, i had the receiver(500w) at level 10, playing music. Two rooms over(and down the hallway) you couldnt hear it. You had to be almost right outside the door to hear it.

The important thing to know is that water weighs 19.5 lbs on Jupiter, and when going on long hikes and carrying water in a backpack makes it weigh "a lot"...

Good work S_K !

Speaker_king,

There are probably two major problems which you need to address. First, this is probably an interior door. Many of which are hollow with a thin veneer outer layer. This kind of a door will not block much sound out. THe rest is the door has to be completely sealed with weatherstripping around all sides of the door.

The easiest way to solve this problem is to remove the trim around the door and measure around the opening of the rough door frame to get it's exact size. Then order an exterior grade foam core metal door with frame that fits into this rough opening. Then remove the existing door and frame and replace it with the exterior grade. IF you really want it to work well they have more expensive acoustic grade doors. But a standard foam core will work several times better than the existing one at blocking out sound. You can also cover the interior of the door with some sound deadening material which can help a little bit more.

The exterior door is designed with a frame that is sealed all around. Even the threshold. THe foam core damps most of the sound. IF you can afford it get the heavier grade metal as it will be more dead.

This will cost you about 100-120 USD or maybe 150 USD if you need to have a custom size made.