Thanks. I’ve installed it and looking at it now.

The experiment I need would be… Acoustic Amplitude, right?

And the steps would be? (sorry, I’m not very scientific)

“Calibrate” tab > “Calibrate”: do this when there is no/little noise?
“Calibrate” tab > “Offset”: no idea what to do here.
“Amplitude” tab > when there is noise I want to measure, press the play button?
“Amplitude” tab > after a bit, press the pause button?
Then, other? 3-dot menu > “Export data” or “Share screenshot”?