Preamplifier for Knowles Microphones

[김상명 <smkim123@xxxxxxxxxxx>]

Dear,
I plan to measure the microphone sensitivity of a Knowles TM series microphone that is 
typically installed in hearing aids.
My problem is that the microphone output response is extremely low (0.18mV to 73 dB SPL)
so that I feel that I have to use a high gain pre-amplifier possiblly as much as about 60 dB.
Does anyone know any good commercial preamplifer for this purpose or any alternative way?
Thank you in advance for your suggestions.

Sang
-Hearing instrument engineer

"우리 인터넷, Daum" http://www.daum.net 『평생쓰는 무료 한메일넷』

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Content preview:  Dear, I plan to measure the microphone sensitivity of a
  Knowles TM series microphone that is typically installed in hearing
  aids. My problem is that the microphone output response is extremely low
  (0.18mV to 73 dB SPL) so that I feel that I have to use a high gain
  pre-amplifier possiblly as much as about 60 dB. Does anyone know any
  good commercial preamplifer for this purpose or any alternative way?
  Thank you in advance for your suggestions. [...] 

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