Re: What about regular showers?
But who does call the device "sonic shower"? It's a DS9/VOY thing exclusively
No, it isn't.
The first mentioning of the phrase that I can recall is TMP, when the probe-Ilia first shows up. We hear the computer voice say "Intruder location: A sonic shower".
"If the world was perfect, it wouldn't be." - Yogi Berra