On Sat, 04 Feb 2012 19:40:04 +0000 (GMT), Stuart
wrote:

In article ,
Swingman wrote:

... that does not mean that nothing outside that flat frequency
response is not picked up, it just means that it will not be picked up
at the same level as that sound within the flat response.

A look at the curves shows all.

Having worked at Shure Brothers in R&D, I can assure you that the
published curves are cut off and do not show full range of response of
a microphone, just the human hearing range is referenced. 20hz to
20khz is where you make the mic flat as possible.