Acoustic Measurement with NI-9234

Updated Jan 25, 2019

Reported In

Hardware

  • NI-9234

Issue Details

I connect a microphone to the NI-9234 and I would like to measure an acoustic signal.
What is the measuring unit of the resulting signal in MAX? Is it dB or Pa?

Solution

The scaled units parameter is set to Pascals for this kind of measurement, as shown by the underlying picture.
The sensitivity of the microphone shall be set in advance, so the physically acquired voltage signal can be converted to pressure values.
 

WAS THIS ARTICLE HELPFUL?

Not Helpful