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Message ID: 6664     Entry time: Tue May 22 23:36:02 2012
Author: Den 
Type: Update 
Category: PEM 
Subject: mircophones 

I've put 5 EM172 microphones close together and measured there signal and coherence. They are plugged in to accelerometer channels.

close_micro.png

 

Then I've suspended microphones around the MC - 2 at MC2, 2 at MC1,3 and 1 at PSL. The amplifier box is above STS readout box.

 DSC_4288.JPG           DSC_4299.JPG       DSC_4304.JPG      DSC_4302.JPG

Microphone close to PSL gave a strong coherence with MC_F, as we already saw it using Blue Bird Microphone.

ACC_MC2_XY channels <=> MC2 microphones

ACC_MC1_XY channels <=> MC1,3 microphones

ACC_MC1_Z channel <=> PSL microphones

5_mic.png

 

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