Analog Input >> Sound Pressure >> Microphone >> Sensitivity

NI-DAQmx C Properties

Analog Input >> Sound Pressure >> Microphone >> Sensitivity

Data Type: float64
Description: Specifies the sensitivity of the microphone. This value is in mV/Pa. Refer to the sensor documentation to determine this value.

You can get/set/reset this property using:
  DAQmxGetAIMicrophoneSensitivity
  DAQmxSetAIMicrophoneSensitivity
  DAQmxResetAIMicrophoneSensitivity