Indeed that's what it says. That's neither ultrasonic nor easy to block with reasonable quantities of sound dampening materials. They also directly mechanicall

Indeed that's what it says. That's neither ultrasonic nor easy to block with reasonable quantities of sound dampening materials. 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.