Abstract: A system for transmitting power and data through a solid medium includes a power signal transmitter configured to acoustically transmit power through the solid medium to a power signal receiver using a first frequency and a data signal transmitter configured to acoustically transmit data through the solid medium to a data signal receiver using a second frequency. The second frequency may be offset from the first frequency and from at least a first overtone of the first frequency. Furthermore, the data signal transmitter and data signal receiver may be positioned at a null of a pattern of acoustic waves produced by operation of the power signal transmitter. The system may further include a notch filter coupled to receive an electrical output of the data signal receiver, the notch filter being tuned to attenuate the first frequency.

Abstract: A flexible pile thermal barrier insulator includes a plurality of upstanding pile yarns. A generally planar backing section supports the upstanding pile yarns. The backing section includes a plurality of filler yarns forming a mesh in a first direction. A plurality of warp yarns are looped around said filler yarns and said pile yarns in said backing section and form a mesh in a second direction. A binder prevents separation of the yarns in the backing section.