In Reply to: Re: Unity Patent posted by str8aro on June 27, 2002 at 06:14:18:
Hi John!I hope you understood that, during this dialog, I was addressing the claims of wideband loading and time alignment from the Unity design. I was not "bashing" the design's performance or your particular implementation of it, rather I was showing that it isn't a "magic pyramid" either, and is bound by the same physical laws as all other modern horn loudspeaker systems.
What I was doing was to point out that the device couldn't provide wideband loading any more than other similar implementations. It requires compensation equalization to boost the top decade of its response. Not that this is bad - Many horn designs have the same sort of mechanism. I use conical horns, and I run them over a wide bandwidth. And I use compensation circuits to accomplish this too. So it isn't something I disapprove of; far from it - This is its greatest strength. But this and the similarity of some of our design choices made me feel even stronger about pointing these things out.
I also wanted to address the fundamental problems of making a system accurate in the frequency domain and the time domain, simultaneously. I think Tom has made clear that this is only accomplished at the crossover point, and it is done in order to "splice" together the subsystems response (frequency domain). As far as wideband time alignment is concerned, it is just not possible. You can't have an array of diaphragms and expect them to act as though they were in the same space. You can make design choices that solve specific problems and that is all. It is a "best fit" scenareo, where you are staggering placement for a fixed delay between subsystems. So I suspect that your horn is as "time aligned" as the production models.
Finding a patentable claim in all of this must have been a real task. I expect that the IP attorneys did an exemplary job of wording the claims so that they were acceptable for publication. And after spending a few days discussing this with Tom, I've come to like him and am glad they were successful with it.
Just wanted to let you know where I stood, because this thread became so unweildy, and at times, heated.
Wayne
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Follow Ups
- Re: Unity Patent - Wayne Parham 07/14/0219:47:15 07/14/02 (0)