If you know how a voice coil and cone speaker works, this will be easy. Compare it with a cone. This is actually what makes the noise.
Electricity triggers the movement in the diaphragm, acting as a cone, but just flat.
Now there is a lot more to it than that, but this technology is shaping the future of sound and speakers alike. The flat panel gives us more. They claim 360 degree range, but I prefer them pointing at least somewhat in my direction. I do agree, the flat panels give a lot more spatial range. The voices and mids were back to normal and sounded clean and powerful.