Re: Thank you very much and one last question! - David Aiken

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Re: Thank you very much and one last question!

Posted by David Aiken (A) on February 22, 2007 at 14:34:09

In Reply to: Thank you very much and one last question! posted by Lona on February 19, 2007 at 01:18:31:

Absorption requires the absorptive surface to be in contact with the air and sound waves.

Let's say you make a cube shaped bass trap which measures 4' on each side. All 6 sides are fibreglass. If you raise it up above the floor on narrow legs, you have a 6 sided trap. If you sit it directly on the floor, one surface loses that air/sound wave contact so you effectively have a 5-sided trap. You may get a little benefit from having the 6th surface on the inside but it won't be anywhere near as much as you lose by sitting it directly on the floor and losing an outside surface. If you stack another bass trap of equal dimensions on top of the first one, the first one now becomes a 4-sided trap and the top one is a 5-sided trap. If you have 8' ceilings and the top surface of the top one is in contact with the ceiling, you have two 4-sided traps. So, if you go floor to ceiling with the traps, effectively there will be minimal difference between using 4- and 6-sided traps.

Effectiveness depends on outside exposed absorptive area and on other factors as well. In the above example, one 5-sided trap, or even one 6-sided trap will not be as effective as two 4-sided traps of the same dimensions. If you're going to stack traps, use something solid for the top and bottom plates with some sort of internal structure between the plates so that they can be load bearing.

Even if you don't intend stacking traps, I'd be inclined to go for traps with solid top and bottom plates and an internal structure so that you have the option of stacking them later on if you choose.

David Aiken

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Follow Ups Full Thread

Topic - Can the Ikea Hol be a bass trap if I stuff 2" Owens Corning 705 - Lona 06:41:57 02/18/07 (12)

Note that there is also a longer version at $70 - Dave Pogue 05:33:47 02/19/07 (0)

Re: Can the Ikea Hol be a bass trap if I stuff 2" Owens Corning 705 - kenster 18:06:11 02/18/07 (1)

Additional questions... (if JON RISCH could chip in too;-) - Lona 15:45:25 02/18/07 (7)

Reply - Jon Risch 19:53:32 02/18/07 (6)

I tried the brute-force fiberglass rolls, left in their plastic wrap, and had trouble breathing for weeks - hukkfinn 12:50:32 02/19/07 (1)

Not typical - Jon Risch 16:34:13 02/22/07 (0)

Thank you very much and one last question! - Lona 01:18:31 02/19/07 (3)

Re: Thank you very much and one last question! - Jon Risch 20:07:51 02/22/07 (0)

Re: Thank you very much and one last question! - David Aiken 14:34:09 02/22/07 (0)

Re: Thank you very much and one last question! - Champion 02:26:24 02/22/07 (0)

Re: Can the Ikea Hol be a bass trap if I stuff 2" Owens Corning 705 - MrDerrick 15:06:08 02/18/07 (0)

Re: Can the Ikea Hol be a bass trap if I stuff 2" Owens Corning 705 - Tippy 10:04:14 02/18/07 (0)

Follow Ups

Re: Thank you very much and one last question! - David Aiken 14:34:09 02/22/07 (0)

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