I've long wanted to explore this. There are two ways one can go about it: - Airliner cockpits use certain audio signals deliberately and sparingly, to draw att

I've long wanted to explore this. There are two ways one can go about it: - Airliner cockpits use certain audio signals deliberately and sparingly, to draw attention to important events. - Some systems naturally (or artificially) emit sound as a side effect of what they do, and this sound, while not signaling anything specific, is part of what allows the operator to build mechanical sympathy for the system. I think these two are completely different ways to use sound, but I imagine both could be viable.