Question on Microphones

Noral D. Stewart noral at ix.netcom.com
Tue Aug 5 07:19:44 EST 1997


Jeffrey Sirianni wrote:
> 
> A patient from our office asked me the other day about microphones used in
> hearing aids.  As he has problems with detection of speech in noise, he
> inquired about Audio Zoom from Phonak, which he will be trying.  He asked
> about parabolic microphones, used for surveillance and such, and wanted to
> know why the this technology could not be incorporated into a hearing aid.
> I know this is a silly question, but could someone with technical
> background in microphones explain how a parabolic microphone works and what
> are the essential components.
> 
> Jeff
> 
> ***************************************************
> * Jeff Sirianni, M.A., CCC-A                      *
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Two immediate problems come to mind.  One is size.  The other is that
the parabolic microphone has to be carefully aimed at the source.



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