Yeah, right on.
I must be in some real psychological trouble because I feel like I'm really starting to get a handle on some of this stuff. I am getting way more into it than I ever intended to be.
It sounds dumb, but it really is looking at the whole room as a "system" and not trying to pick on specific points.
To be honest, it was "SAC" that got me thinking about this a bit more when he mentioned something about the difference between modal problems in the low end and specular problems in the low end.
I'm still not even 100% sure what that means, but it knocked something loose in my brain... in a good way.
On the one hand, I guess it doesn't really matter if all you want to do is fix everything the best you can with one big blanket, but what I am beginning to find out is that I have a need to know why.
Thanks,
Seamus
Quote:
Originally Posted by jhbrandt  This region is known as the transition region where the wave model changes to the ray model.
As you know, in an enclosure, sound behaves like waves from VLF up to a point that is dictated by the volume of the enclosure and then proceeds to change to the ray model which begins approximately 4 times the upper frequency of the wave region. Is that confusing enough? Maybe SAC could chime in here and completely baffle the rest.  (I understand you SAC...)
All joking aside, this region is best treated with broadband absorption and diffusion. Absorption because in this transition region are usually many near incidences (same frequencies) of axial, tangential, and oblique modes or standing wave reflections - even in the best of rooms. Diffusion because these frequencies can also take on characteristics of the ray region and can cause specular distortion in the form of comb filtering and the Precedence Effect or Haas Effect and can mess up the imaging.  |