Sound influencing other robots has been suggested, or at least inquired about, before, though unless it was made a core mechanic (which would in turn negatively affect a number of other features and aspects of balance, I believe), it wouldn't be meaningful enough.
What you say here is much more specific than "robots hearing things," which is good because it's more controllable and would have a purpose, though I don't really see a great use for this which isn't already partially covered by something else.
You can take a pot shot with a single fast weapon to get their attention then retreat, or just let them see you then duck back, or let a nearby Watcher see you and report your location, or fire at a non-hostile robot so they call for help,
or use guided weapons to hit them from around a corner, or even catch them in the radius of an explosion while you yourself are out of sight so they come investigate. I'm sure there are more I've forgotten here. Most do require shooting of some sort, except for just being seen. There's... intentionally stepping on an alarm trap
Ambushing robots is also already too powerful, and this would only exacerbate that. (I've considered making them smart enough to avoid some ambushes, but decided against it for now. It's fun as is--maybe that would be for certain smarter hostiles later on.)
(Also, that kind of energy cost is meaningless if you're lying in wait, anyway.)
