soundhaspriority wrote:

I stand corrected on the issue of the backplate. However, your assertion
that equally good microphones are made by either method is not supported by
this Wikipedia article: http://en.wikipedia.org/wiki/Microphone I quote:
Though electret mics were once considered low-cost and low quality, the best
ones can now rival capacitor mics in every respect apart from low noise..."
The article says that electrets can be made that are the equal... but also,
ARE NOT made that are the equal in terms of noise. The article does not
explain why quiet electrets cannot be made, but it quite unequivocally
states that they are not.

Wikipeida is one thing, and B&K and DPA mics are another. Seek a
top-shelf electret and ye shall find.

--
ha