ni9234 and bruel microphone

[cpalka]

Dear all

I have a NI9234 board and I know that it reads sound too from a Microphone.

Anyone has experience using this board with Bruel & Kjaer microphones?

I have a microphone 4190 with a preamplifier 2669, if someone knows how to connect it?

Best regards

cpalha

[dsb@NI]

You need a cable to connect the LEMO 1B connector of the preamp to the BNC input of the 9234.

[cpalka]

Hu Doug

Thanks for Your answear.

If I understand we get the output signal from 2 pins of the LEMO 1b connector right?

I read that this preamplifier needs a polarization power (bipolar or unipolar) with this cable we will get the readings directly to the microphone?

Best regards

CPalha 

[dsb@NI]

You would have to supply your own excitation voltage as the 9234 IEPE will not power that sensor chain - sorry my original post was incorrect. To use the 9234, you will have to supply your own signal conditioning to power the 4190 mic/2669 preamp, or you can use a different, IEPE compliant, sensor to perform the measurement.

[cpalka]

Hi Doug

Thanks again for your help.

Can you please help understand about "  IEPE compliant, sensor to perform the measurement".

Can you tell what microphones are similar that works directly with NI9234?

Best regards

CPalha

[dsb@NI]

If you like B&K microphones, look at the 4189-H-041 to see if it meets your needs. It is a prepolarized mic with input type = CCLD IEPE. If you want to look at other options, you can visit ni.com/sensors (click on Acoustic Sensors) and select microphone that best fits your needs.

Refer to the document How to Choose a Microphone for Sound Measurements for a quick primer on choosing a microphone for your application.