🚀 go-pugleaf

In article <cstevens-0109951235590001@cstevens.advtech.uswest.com>
           cstevens@uswest.com "Clarke Stevens" writes:

> In need some instrumentation microphones and accelerometers for some
> multi-channel (16) DSP tests I am running.  My current choices seem to be
> B&K and HP's DSA brand.  Both of these are quite expensive.  Does anyone
> know of some less expensive options that would meet the following
> criteria?
> 
> * Flat frequency response from about 30 Hz to about 8 kHz or better
> * Consistent quality
> * Battery powered power supplies/amplifiers
> * BNC output
> * Reasonable environmental tolerance (i.e. mounted to a vehicle in the hot sun).> 
> Thanks in advance,
> Clarke

Knowles Electronics make good quality electret microphones inserts. I
got a couple of samples from their UK office, although I haven't used
them yet. The acoustics division of the firm I work for uses them a lot
for spectral analysis inside noise reducing headsets and the like. They
are quite inexpensive at about #12 each. I don't have the data with me
here, but their response is flat to over 10 KHz, as I recall. You'll
have to attach your own connector and battery, though. Knowles is a US
company, and I don't have their US address with me, I'm afraid.

Leon
-- 
Leon Heller, G1HSM                | "Do not adjust your mind, there is
E-mail leon@lfheller.demon.co.uk  |  a fault in reality": on a wall
Phone: +44 (0)1734 266679         |  many years ago in Oxford.