In Reply to: RE: Driving Sound Labs with Atma's posted by throwback on June 16, 2012 at 04:43:09:
Just kidding, sorta, but the capacitance of your panels must be marginally lower up there in them mountains. Since the multiplier for the dielectric contant of air is 1.00054 compared to vacuum, the lower the pressure the closer you get to 1. When you get to one you will hear nothing :). I did some calculating and it turns out for the 2350 sqin area and abut 0.15 in panel to stator distance, and having the two sides of the push-pull in series, the resulting capacitance is somewhere between 1500 and 1800 pf. which is very closed to the published value. There is also an interesting side observation that if the panel was not push pull there would be an asymmetric distortion with the displacement of the diaphragm, but the push-pull cancels it out, very clever, never thought of it. looking at the panels at high volumes, they move quite a bit, the capacitance is a linear function of the distance, so moving half a distance closer doubles the capacitance, at the same time the opposite side halves, the series value of course is not constant. I have not calculated forces, but because static force on a charge has a quadratic relationship to distance the push pull is nto entirely linear either. I am sure Dr. West has a precise model of the whole thing just for satisfying ones own curiosity, or hell just listens to the damned thing and ignores the mumbo jumbo.
dee
;-D
True terror is to wake up one morning and discover that your high school class is running the country.
quote by Kurt Vonnegut
Edits: 06/18/12
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Follow Ups
- Sounds do disappear in thin air :) - Penguin 08:51:49 06/18/12 (15)
- I am impressed.... - Lew 14:12:34 06/18/12 (14)
- do not be... - Penguin 19:10:17 06/18/12 (13)
- RE: do not be... - Lew 22:11:45 06/18/12 (12)
- RE: do not be... - throwback 10:46:09 06/19/12 (11)
- Quite a coincidence... - Lew 11:56:21 06/19/12 (10)
- RE: Quite a coincidence... - throwback 12:17:25 06/19/12 (9)
- ESL high power output - tyu 13:26:30 06/29/12 (8)
- Colorado wildfires - Lew 17:41:08 06/29/12 (7)
- RE: I spoke to Chuck on Monday :) - Ralph 10:23:31 07/04/12 (4)
- Great news! - Lew 07:29:40 07/06/12 (2)
- RE: Great news! - tyu 09:11:37 07/07/12 (1)
- 103 degrees F today - Lew 12:55:30 07/07/12 (0)
- RE: I spoke to Chuck on Monday :) - tyu 12:02:40 07/04/12 (0)
- RE: Colorado wildfires - tyu 07:16:49 06/30/12 (1)
- i will try the bike - Penguin 10:03:44 06/30/12 (0)