Peep (The Network Auralizer).
> replaces visual monitoring with a sonic `ecology' of natural sounds, where each kind of sound represents a specific kind of network event.
https://www.usenix.org/conference/lisa-2000/peep-network-aur...
The concept is that we are wired to notice sounds that are out of the ordinary, but “ordinary” sounds are not distracting.
I had forgotten about this project for a number of years until I read Peter Watts’s Blindsight.