peg board bass trap??

Hola,
I am going to buy a peg board to hang cables on. I was thinking of a 1x2 frame around the perimeter (on the side against the wall) to hold it away from the wall to accommodate the pegs.
Now I'm wondering if you guys know of a better way that might even help acoustically (ie bass trap?).
Any suggestions are appreciated.
TIA,
Randy

Well thanks Oaf, but where do I hang my cables? Seriously, I just thought if I was going to build the peg board (to hang cables) I might be able to kill two birds by treating it some way.
I just moved here and don't know what this room is going to sound like yet (28.5' X 19.25' with a 12' cathedral ceiling). I'm in the process of setting and installing shelves etc.
Thanks again,
Randy

You could look into Helmoholtz Rersonator designs... or just stuff the void with 4lb/cuft fibrewool and be done with it.


best regards,
mike

Hang the peg board behind the Bass Trap.

ORIGINAL: Mod Bod
The fact that he has pegboard hooks with cables hanging off of the panel will IMHO, negate most of the effect. I wouldn't go through the extra expense and work.

+1. Best to keep those two separate projects, or you'll end up disappointed.

Pick up a copy of The Master Handbook of Acoustics by F. Alton Everest. This book should be standard equipment in everyone's studio. It describes how to build a resonator using perforated sheets like pegboard. So yes, along with some 703 behind it you can make it double as a bass trap.

I once made a bass trap out of a coffe table this way. It was deep, and had short legs. I glued a standoff out of 2 x2's around the inside perimeter of the bottom. I filled it with rockwool, and attached the pegboard to the bottom. This was for a home theater set-up, but it did wonders to reduce the boomy standing waves I was getting.


And +2 on that book...it's within reach in my studio. I framed my room to dimensions reccomended in the book.

The holes aren't really needed. The board will resonate from the low frequencies, and the rockwool traps them. You can make simple corner traps with a board bent and clipped to the wall covering nothing but air...although getting the right size is the tricky part. Pegboard holes are fine, and even using a 1/8" plywood works too.

Really? The holes in peg board are pretty small. I don't see how the diffusion material behind it would do much absorbing.

Yeh, it's somewhat counter-intuitive. You'd think that those tiny holes would look like a solid sheet to anything but ultrasonic frequencies (~45KHz is the wavelength of 0.25'). But it's really a resonator and surprisingly, can be designed for a fairly low resonant frequency.

Everest has a chapter devoted to "perforated panel absorbers" (p. 218 for those who have the book). In his chart he shows 1/8" and 1/4" hole diameters. The primary factor is the total combined hole area and what percentage of the surface of the pegboard is holes.

To quote Everest:

Each hole acts as the neck of a Helmholtz resonator, and the share of the cavity behind belonging to that hole is comparable to the cavity of the Helmholtz resonator. We can view this structure as a host of coupled resonators.