Misunderstanding. Only could transfer sound through gaps smaller than wavelength in piezoelectric material. So this could be used as sort of decoupling of circ

Misunderstanding. Only could transfer sound through gaps smaller than wavelength in piezoelectric material. So this could be used as sort of decoupling of circuits, may be in some cases better than photoelectric decoupling. So still Star Wars must be silent, except explosions directly touching hull, and when laser (or some powerful radiation) hit hull. Yes, when powerful X-ray hit hull, it will be partially absorbed and immediately converted to heat, and this could be noticeable.