Originally Posted By: Pat Marr
I put egg crate style foam on the walls in my little studio , and I was surprised by how much it deadened the echo.

As a test I made the same sound in an untreated hallway outside my studio, and again inside my studio... it was noticeably "deader" in the studio.

This isn't even acoustic foam.. its packing foam I got from the manager of a local FED EX. The irregular surface is what tames the echo.

Not recommended for a pro studio, but for what I do, "the price was right for the tight"


Pat, eggcrate foam can be very effective for mid and high frequency absorption and elimination of flutter echos. If you can get your hands on it, use it. When you say it isn't acoustic foam, it does have most of the properties - open cell, a variety of depths (which helps to broaden the frequency range of absorption as well as the overall absorption coefficient) The deeper the 'valleys' the more effective it will be.
On this photo of my Gobo, down at the bottom, you'll see eggcrate foam that was indeed scavenged from some packaging at my old employer. The wedge materials at the top 2/3 of the GOBO were scraps of actual acoustic foam wedge panels that I scavenged and pieced together and glued to the Gobo


What doesn't work are old-school paper eggcrates - these will help scatter high frequencies, but have very little absorption properties.

Last edited by rockstar_not; 01/20/14 11:11 AM.
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