I do already have a rudimentary feature for displaying these which you may have seen in some of my debugging screenshots, but properly visualizing these is actually pretty processor intensive. Although it does look pretty neat, it would greatly interfere with lots of other much more important visual markers, so this is not something that will be added to the release version, no.
Actually the
full visualization is also too much information that the player shouldn't have, anyway--you shouldn't know about sounds in spaces other than where you're currently standing, so there's really no area to visualize and it doesn't look as cool as all that
But that leads to this:
also be helpful in finding them with the sound turned down
This is a separate issue for which I've been considering an alternative approach for a while now: adding closed captioning for all sound effects. It's actually been on my todo list for years at this point, but it's way down at the bottom since no one's ever talked about this before, just me thinking about it
