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In the Forum: Playback Listening
In the Thread: The “Dead Points of Live Sound”
Post Subject: Re: The “dead points of live sound”Posted by rdrysdale on: 5/14/2005
Excellent post Romy. Definitely the room treatments and speaker locations are probably the most important part of the overall system. I have heard good speaker systems in poor surroundings, if the setup isn't right, nothing can save the sound quality. So how do you suppose the proper DPoLS can be located? With a system like Steve Schell and I are working with, everything weighs hundreds of pounds and to properly evaluate changes would take days, maybe even weeks for one room. I suspect that the materials that a room is constructed of would also affect all aspects of the proper set-up position, especially the design of the floors, whether raised foundation, or solid concrete slab.
I've been working with a retired metallurgist for the last 15 -20 years, he is using the vibration frequencies of different metal specimens to determine their different characteristics (hardness, tensile strengths etc.). When a specimen is located to be tested, it must be clamped at a specific vibrational node, actually, locations where the material isn't flexing at all, If this location isn't held to within a couple of thousands of an inch, the test will be skewed. We have equations to find these nodes for different shapes an sizes of material. I suppose a equations could be figured out to find a starting point for the absolute best set-up positions. I know that's being done now, but it probably isn't related to the DPoLS.
Rich Drysdale
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