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In Reply to: IM distortion posted by mäç on July 17, 2010 at 13:28:23:
You can visually translate it. -20db = 10%, -40db = 1%, -60db = 0.1%, -80db = 0.01%, etc, etc.
I did this about three years ago. I need to repeat the test using ARTA and a different excitation. A shaped tone burst vice the pink noise would better illustrate.
There's a certain amount of mutual (electrical) coupling contained in that measurement as well. The only way to separate that out to yield the actual distortion caused by the mylar movement would be to remove the mylar from the frame or to constrain the mylar movement somehow. Neither easy to do. :)
Anyways, what it shows (in my opinion) is that the "coupling" (electrically and physically) between drivers co-located on a single mylar membrane is not all that great.
Cheers,
Dave.
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- RE: IM distortion - Davey 07/17/1014:55:01 07/17/10 (0)
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