#1647544 - 04/10/04 03:15 AM
Low End Problem in Vocal Booth
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Thomas K
Senior Member
Registered: 11/04/00
Posts: 176
Loc: Atlanta, GA
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I inherited a fairly nice home studio with the house I purchased. The vocal booth is a nice looking attempt - wood floors, floated on sand.
The sound, however, is miserable. So much that I have just ignored the room. The walls are all odd lengths - 5, 8, 9 and 11 ft. I thought I would use the room for a real dry vocal sound. So I took 4x8 panels I made with 703 and hung them around the room. It's dead, very dead, but this low end rumble that I can't really place the frequency. It resonates with my head, though.
So my thought was to build a bass trap in possibly two of the corners.
1) Is this a good idea?
2) If so, can someone guide me on dimensions of the trap. I thought I might peg board off the corners and fill behind with dense insulation.
Thanks,
Thomas
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#1647545 - 04/10/04 07:08 AM
Re: Low End Problem in Vocal Booth
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Andre Vare
Senior Member
Registered: 03/13/04
Posts: 125
Loc: Hamilton, ON Canada
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What is the height of the ceiling?
What is the treatment of the ceiling?
What is the thickness of the 703?
How many panels did you make of 703?
Are the panels easily movable?
703 at 1" has minimal absorption at low frequencies. 2" starts to be ok. If you space 2" of 703 2" away from the walls and/ceiling, you increase the low end absorption significantly.
Pegboard is useless for this application.
All modes come together in the corners. If you can move your 703 panels easily, try putting them diagonally across the corners first to reduce the low end.
Also try moving them into the corners on the walls.
The cost, if you can do this, is zero. If you like the results, consider cutting them in half and doing the corners diagonally.
There are three things you can try before having to spend any money.
Good luck and let us know how it turns out. It sounds, no pun intended, like a room with great potential.
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#1647546 - 04/10/04 12:56 PM
Re: Low End Problem in Vocal Booth
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Thomas K
Senior Member
Registered: 11/04/00
Posts: 176
Loc: Atlanta, GA
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"What is the height of the ceiling?"
10 ft
"What is the treatment of the ceiling?"
It has 703 on it - not completely covered.
"What is the thickness of the 703?"
1 inch.
"How many panels did you make of 703?
Are the panels easily movable?"
The panels are movable.
Thanks for the tips. I actually tried something similar and can already hear the difference.
Thomas
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#1647547 - 04/13/04 03:30 PM
Re: Low End Problem in Vocal Booth
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Emperator
Senior Member
Registered: 09/24/01
Posts: 402
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I'm working on the same problem here with my vocal booth. Tall 7'8' x Wide 5'4" x Long 8'4".
I found the most dramatic change by putting 2" 705 across the corners.
Night and day. My conclusion was that the corners make the most dramatic difference by a long shot. It went from being the Brill Building reverb chamber to sounding nice for acoustic guitar and vocal mostly just by doing the corners.
After I was left with a slight ping that you have to clap your hands hard to hear. I made some diffussors and put them on the wall. But my design turned out to be terrible. Only made the room flange loudly and metallic sounding. So I currently went back to 2" sonex on 2 walls (not the walls opposite each other).
I don't think I've got it quite nailed yet, close and useable now though.
Though everyone says it sounds nice in there now.
I've moved in and am using it quite happily. lol.
Probably try some professionally made Diffussors on the walls next. Though depth of the panels is an issue.
It's was a little tough to do but I cut the 705 this way. I took a framing square and laid it across the top of the sheet with each leg of the 45 degree angle ending at 4 inches. Make the marks for your cutting lines from where the framing square intersects at each surace. Draw your lines across the front and back face of the 705 from these marks. Cutting with a saw set the blade at 45 degree angle. The 45 degree edge of one piece is the 45 degree edge of the next piece. So each piece I cut has a 45 degree angle on each side and so spans the corner about 5 and 1/2 inches (hypotenuse of the angle). It leaves about 2 inches of dead space behind the pieces in the corners.
I bought some spray adhesive and fabric from wall mart and and wrapped them. I used liquid nails to glue them into ALL of the corners.
Yes it's a tough messy job cutting the 705.
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#1647548 - 04/13/04 03:47 PM
Re: Low End Problem in Vocal Booth
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Emperator
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Registered: 09/24/01
Posts: 402
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My room is a rectangle shape, so all the corners are 90 degree angles. So getting the proper angle to mate the 705 to the walls of your corners is going to be tougher. Good luck.
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#1647549 - 04/15/04 03:54 PM
Re: Low End Problem in Vocal Booth
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Emperator
Senior Member
Registered: 09/24/01
Posts: 402
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If you need to make a template for the shape of unusual angles in walls, etc. Here's a carpet layers' trick:
Tape paper or cardboard on the floor and measure an offset from the surface (like say 2" away from the wall) then draw the lines on the paper / cardboard from that for your template of the shape. Cut the paper / cardboard on the lines, etc.
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