On 17/05/2011 15:59, Gordon wrote: > On Tue, May 17, 2011 at 3:39 PM, Olin Lathrop = wrote: >> > For example, I once saw a room with cardboard >> > egg cartons stapled to the walls. It deadened the sound surprisingly= well, >> > although it wasn't like a professional sound studio. Multiple thin s= heets >> > of cloth with a little separation between them takes space but are >> > relatively cheap. > That surprises me, from my experience it is how well the material > absorbs the sound is the most important factor, eg just having carpet > in a room significantly reduces the reverberation. The surface of the > studio acoustic foam is in an egg box shape to aid with frequencies > the foam struggles to absorb so is secondary function. > > Egg boxes ability to absorb is limited so most freq pass straight > through (with a little attenuation) and are still reflected of the I think egg boxes are used also to soundproof as well as deaden sound -=20 when I was in my first band we practised in a garage and used this=20 technique. We went to the local farm(s) and asked for a load of egg=20 boxes, then spent a couple of days fixing them any way we could to the=20 walls. It looked pretty dodgy, but actually worked well for both=20 purposes - we fitted two layers as this worked a lot better than one. Later on, when we actually had a proper soundproofed (rockwool in the=20 walls) studio, we found well placed carpet or foam works well enough to=20 deaden the sound, and can be fixed in ways that looks decent. One thing to keep in mind is you have to account for variables like=20 people and equipment that may or may not be present. I remember playing=20 at a big hall in Manchester with wooden floors/walls and terrible=20 acoustics while empty, but when it filled up with people it was a lot=20 better. --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .