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High Efficiency Speaker Asylum Need speakers that can rock with just one watt? You found da place. |
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In Reply to: Re: From Wayne Parham - Re: Patentable claim posted by Wayne Parham on July 5, 2002 at 17:47:03:
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You defend your position that the device sums true, but then argue about what caused the anomaly I've referred to.Of course it's the geometry. When you've got two point sources that overlap, you're going to have positions that display this sort of anomaly. I understand that you've tried to make the flare angle narrow enough that the anomalous regions are outside the flare. But combining the sources in a common chamber ensures that you will have interaction, nonetheless.
--------------------------Ok, then please be more specific in what you see a problem with. Your comments claimed an INTERACTION between the output of the drive units. Here you are talking about the effect of having entry holes to the flare. This effect, has no change whether the midranges are in place, connected, or just sitting there. If this was an acoustic interference problem, this would only be observed when the midranges where simultaneously driven and measured. Do you not agree?
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Mark - You've said that "the 8 entry holes for the midrange drivers are spaced at less than 3" apart." But I'm sure you mean adjacent holes are less than 3" apart. So how far are the most distant holes?John - You've said that you found the 4kHz dip on the Lambda version was the holes. This means that there was a diffraction anomaly, just as I've said.
So what argument exactly are you defending?
--------------------------The holes are sized and spaced to minimize any discontiunities in the horn. With some simple refinement this anomaly becomes quite small and narrow in band, and even unseen in 1/3rd octave measurements. What was being defended was your accusation that the drive units do not sum as a single source, and your claim that this anomaly which is dependent ONLY on the compression driver in the horn, somehow demonstrated an improper summation of the acoustic energy of the compression driver and midrange. Again, the crossover is at 1200Hz, and the midrange output is attenuated at least 20dB by 4kHz when the acoustic output and crossover network are combined.
Mark Seaton
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Follow Ups
- Re: From Wayne Parham - Re: Patentable claim - Mark Seaton 13:28:59 07/06/02 (1)
- Re: From Wayne Parham - Re: Patentable claim - Wayne Parham 14:09:45 07/06/02 (0)
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