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In Reply to: RE: On the subject of directivity posted by kentaja on July 05, 2009 at 08:53:27
I would be careful to draw any conclusions about directivity from the looks of the thing. As I understand it he's using circuit board for the stators with the copper layers in between. Or at least that is what his patent was about IIRC. So it would be possible to control directivity by means of an electrically segmented stator.
Then again, the only thing we can do is guess since there is no data available, just that it is "highly directional".
I'd be interested to get a copy of the piece that you quote P.J. Walker from. Can you tell me what it is? Or send me an e-mail if you can share a copy.
If you are interested in 'new' developments on the area of directivity, there is/has been a lively discussion going on on diyaudio about waveguides, dipoles, cardioid's and controlling directivity. Unfortunately it is a bit scattered across multiple threads (Geddes on waveguides, beyond the ariel, and some others). There are some goodies to be found though.
Another interesting source is the writings of "John Kreskovsky" on http://www.musicanddesign.com/ Lot's of good info there!
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