I got a tour of Prof. Bose's factory as a student while taking his course on acoustics. Active suspension is basically a speaker voice coil but scaled up and pushing a car wheel instead of a cone. A lot of the physics and perhaps more critically, the manufacturing processes, were shared between speakers and suspension as they implemented it. I actually got to sit in the car as it drove over bumps, it was pretty magical. iirc you could flip a switch and set a suspension profile that made it emulate other cars road feel as well. Years later I built a toy model of it using an actual speaker to make a pushbutton switch that could emulate the feel of a broad range of other switches.

At one point, Bose was a few scientists who happened to have a consumer tech company.