A command available in the Query submenu if you select a Sound object. The Info window will show the root-mean-square (rms) value of the sound pressure, expressed in Pascal.

Setting

Time range (s)

the time range (t₁, t₂). Values outside this range are ignored. If t₁ is not less than t₂, the entire time domain of the sound is considered.

Mathematical definition

The root-mean-square value is defined as

where x(t) is the amplitude of the sound. For how stereo sounds are handled, see Sound: Get energy....