[Milsurplus] OT: Microphone Point Source

[Peter Gottlieb]

Cell phone microphones are very tiny and may be sufficiently small to 
effectively be a point for the application.  Some of them have surprisingly good 
frequency response and flatness.  Try taking some from old phones and see if 
they work for you.


On 7/23/2013 2:42 PM, John Hensley wrote:
> A school teacher friend (non-ham) asked me if I knew where he could buy or getsome small microphones.  When I asked "how small", he said "Ideally they wouldbe very very small, almost like the points of a ball point pen".  NADA, says I.  Evena cell phone needs a diameter of 3/16 to 1/4".
> But, I know very little about small point source microphones, if such a thing exists.
> Has anyone heard differently on this?  He has written a computer program and inthat program, the microphones are mathematically seen as points.  I did try to bustthe bubble and suggest there was no such thing, but he is determined.
> Thanks for any suggestions.  Please send hate mail and Ga Fawrs off the list :-) ..
> John W5JV
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