How U determine first and second reflection points

The ceiling wall junctions all around the room should be treated as reflection areas. To me these are the critical areas to treat not to kill but to redirect the pressure back at the listening position. You want the energy that usually flows along the surface of these large planes to become a part of the overall experience..Tom

Uh, how the hell did a simple question that was answered very well by the first several posters turn to a 30 reply thread?
Man, some audiophiles are weird.

David

One needs to careful not to over damp a room. Reflected sound may not be such a big issue because sound levels follow an inverse square law, even untreated walls absorb some portion of the sound that hits them and the Haas Effect allows the brain to suppress a large part of the reflected sound. Most of the domestically acceptable room treatments are not broad band and introduce a change in the tonal balance between the direct and reflected sound which the ear/brain tags as a hallmark of artificially produced sound. If soundstage info is your paramount listening concern, then it could make some sense to suppress first and second reflection points, but if proper tonal balance is more important, then heavily damping a typical home listening room is heading in the wrong direction.

Please don't construe my comments to be anti room treatments. Properly designed and installed broad band absorption systems can work wonders for the proper reproduction of sound. It's just that the best rooms I've been in for long term listening all have a combination of reflective and absorptive surfaces.

David I suppose you could follow as so many others do the same old pitch of foam and fiberglass that so many companys build..These products often do as much harm as they do good..they reduce energy in the room and often suck out the life..Tom