And how will my cat react to this thing? Something with enough sonic energy to vaporize a significant volume of water is probably loud enough to wake every animal in the area.
I'm curious if the ultraound causes increased wear of the fabric at the thread ends, for example.
Good point! The water vapour needs a way out. That means a direct air path between the fabric and the outside world. They cannot seal the entire thing in a vacuum bottle to deaden the sound. I see a 50' pipe full of baffles, a giant truck muffler, between this thing and anyone with eardrums.
There are ultrasonic mist generators for cooling yourself down which probably work on the same principle:
https://www.amazon.com/Ultrasonic-Cool-Mist-Humidifier-Whisp...
and 500: https://www.youtube.com/watch?v=GlEfshsoyZk
If that really is the range they are targeting, this product is doomed. That will be one heck of a noise to cancel. "Soundproof box" is right up there with perpetual motion, zero-point energy, and spherical chickens in vacuums.
A clothes dryer, meanwhile, is a near-ideal case for vacuum isolation + elastic dampening. Build a box with a door; hang an airtight motorized barrel in the box from a bungee cord, with a second door, and electrical connection; and then, whenever both doors are sealed at the same time, [slowly] evacuate the air from the box.
They also directly mechanically couple the transducers to the fabric. You need as much area of transducer as fabric you need to dry, unless you have some automated way to place the fabric on the transducers sequentially.
Is the psychological effect of folding warm clothes rather than cold really that powerful?