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microphone sensor


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#1 chikief

chikief
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Posted 15 December 2009 - 02:39 PM

Dear all, I want to use a microphone sensor in the labjack, but I don't know which sort of microphone shoud I get. I would like to have a reading of the frecuency of sounds in volts that can be handled by the labjack. Of course I don't know if this is possible to perform with labjack... If anyone could help me would be appreciated!!!

#2 LabJack Support

LabJack Support
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Posted 16 December 2009 - 04:59 PM

If you buy a cheap little electret microphone, you should be able to get a signal from it, send it through an amp, and then look at it with the U3. The datasheet for the microphone will suggest a bias resistor that you connect to VS, thus providing 5 volts to the microphone, and will also suggest a series capacitor to get rid of the DC offset. The small signal that results would need to go through an amp, and the LJTick-InAmp should be a decent option for that.


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