Sound Design has been around for some time now. One of it’s branches is called Product Sound Design. It involves designing the sound an object/action makes, that either elicits an emotion or feeling in the user(Acoustic engineers and designers spend resources to create a signature thud sound, which one can hear while closing the door of an exotic car, that communicates the feeling of luxury) or has a desired function(Microwave Timer).
This is an example of Product Sound Design in practice.
As an attempt to use sound as a medium of function in an omnipresent object.I attached sound cues at the uppermost and lowermost rungs of a step ladder, which rang an alert sound when a foot was placed on it. This safety feature attempts to eliminate the problem of knowing when a participant has reached the top or bottom without looking at the steps( which is a major safety hazard, especially while carrying heavy objects and for certain demographics ).
Steel strips were attached to the wooden steps using a custom made mechanism. You can see it in action in the following video.