Ty Ford wrote:

To me that means you think SD have better "residual noise" figures than LDC.
That's usually not the case. Usually, the bigger the diaphragm, the more
movement and higher volatge, therefore lower selfnoise.

The reason that LDC's have lower acoustic self noise is that
the desired signal is correlated over the larger area while
the acoustic noise is uncorrelated. This effects an
averaging of the noise which reduces its relative
contribution. The signal goes up linearly with the area
while the noise goes up with the square root of it, or
linearly with the diameter.


Bob
--

"Things should be described as simply as possible, but no
simpler."

A. Einstein