# AI.SoundPressure.dBRef

Version:

Specifies the decibel reference level in the units of the channel. When you read samples as a waveform, the decibel reference level is included in the waveform attributes. NI-DAQmx also uses the decibel reference level when converting AI.SoundPressure.MaxSoundPressureLvl to a voltage level.

Data type: