How Do I Use DAQ to Measure Sound?

Updated Mar 5, 2018

Reported In

Software

  • Sound and Vibration Toolkit
  • LabVIEW

Issue Details

I need to measure sound coming from a speaker. Can I read a microphone into a DAQ device and analyze the signal in LabVIEW? For example, I want to read sound from a microphone and convert the signal to dB.

Solution

Yes, you can use analog inputs on a DAQ device that can accept the output signal type of your microphone. You will need to consider signal type and range. Further, you will want to consider the desired accuracy for your application.

First, ensure you understand the basics of measuring sound with microphones.

Second, consider using native LabVIEW analysis functions for signal analysis.

To make this process easier, National Instruments produces hardware and software specifically designed for high quality sound and vibration measurement in many applications.

National Instruments Sound and Vibration Devices
National Instruments Sound and Vibration Software
 

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