There’s high voltage. Fire alarm and intercom in this can. And they wanted to find out why there’s buzzing when they call a room.
”THE GLORIOUS REIGN OF 19 YEARS – HOW HE HAS BEEN GOVERNING FOR 15 YEARS” – pro-Napoleon engraving (made during the War of the Seventh Coalition) mocking French king Louis XVIII, France, June 1815
I remade SNW’s Intro in Star Trek Online, with the Odyssey-refit Enterprise-F. Here is a still frame from it (video link within)