Thanks For pointing out that number. I didn’t see that somehow.

I was referring to this:

> In the other, more surprising technique, the fabric is held still to suppress vibrations that are key to the transmission of sound. This prevents noise from being transmitted through the fabric and quiets the volume beyond. This second approach allows for noise reduction in much larger spaces like rooms or cars.

Yeah, but I don't think that can be achieved by applying a static voltage. I think it'd operate pretty similarly to regular nose cancelling where it requires a dynamic signal, but the goal to is keep the fabric stationary rather than to produce a vibration that negates some incident sound at some position. Although maybe that really is as easy as hooking the piezo fibers up to a low-impedance constant voltage source?