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Old 20th August 2013, 07:34 PM   #11
el`Ol is offline el`Ol  Germany
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Join Date: May 2005
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Mic distance is < 1 m.
I didn't like the massive smoothing of gated measurements (no idea whether this problem can be fixed, I'm no ARTA expert), so I posted ungated measurements.
Meanwhile I also amputated what was originally considered the tweeter diaphragm, leaving only what was originally considered the connecting element. The arrangement has no similarity with anything that is currently considered a sound transducer, but I like it best that way.

And yes, these are 15 steps.

Last edited by el`Ol; 20th August 2013 at 07:37 PM.
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Old 21st August 2013, 06:24 AM   #12
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Thanks. The graphs for 30, 45 and 60 are exactly the same?

You would need to look at free field measurements to separate driver/enclosure effects from room effects. Gated measurements will help with that. Yes, it does reduce frequency resolution but so does 1/12 octave smoothing you used in the graphs above.
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Old 22nd August 2013, 04:47 PM   #13
el`Ol is offline el`Ol  Germany
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Yes, 30/45/60 look the same, hard to believe. A file saving problem of Darkshot? Or the time limit for choosing the window exceeded?
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Old 29th August 2013, 09:22 PM   #14
el`Ol is offline el`Ol  Germany
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Gated responses of the "naked" version 0-75, nearfield-CSD
I'm going to couple it to a very soft-sounding bass diaphragm, since coupling it to something hard always sounded untolerably harsh.
Any affordable driver that goes in the Spendor/Harbeth direction? I find Polypropylen quite muddy, and glueing it is not easy.
Attached Images
File Type: jpg na00g.jpg (141.7 KB, 58 views)
File Type: jpg na15g.jpg (141.3 KB, 56 views)
File Type: jpg na30g.jpg (143.6 KB, 53 views)
File Type: jpg na45g.jpg (143.1 KB, 53 views)
File Type: jpg na60g.jpg (143.6 KB, 50 views)
File Type: jpg na75g.jpg (143.2 KB, 7 views)
File Type: jpg nacsd.jpg (187.5 KB, 18 views)
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Old 30th August 2013, 12:42 PM   #15
el`Ol is offline el`Ol  Germany
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Join Date: May 2005
Location: Bavarian Forest
The device coupled to an iron ring to simulate a heavy daphragm (less distance than the other measurements).
Seems that I should be able to run pretty much everything up to 25 kHz.
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File Type: jpg iron.jpg (141.8 KB, 16 views)
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