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mmmmmm

Posted by dave c on December 11, 2004 at 21:28:49:
"..well, point to point contact is an excellent form of 'isolation'. it reduces vibrational magnitude CONSIDERABLY, and is the true working principal of a roller ball."
The working principle of the roller ball is that it rolls. In the vertical it couples which is why a lot of people use them combined with air bladders to isolate in the vertical.
"another principal is that two coupled masses are now one. they share the v. magnitude; let's say the objects are of like mass; the magnitude is reduced by 1/2..."
Yes. my point exactly. By directly coupling, you inherit the entire vibration.
I find it confusing the way you use "isolate" and "couple" as if they are the same.
They are usually used to indicate opposite kinds of relationship between objects.
As such I find it next to impossible to continue this discussion.
If you think you isolate by coupling, fine, but many of us would regret the confusing use of language.