Patent ID: 8588926

Claim:
An implantable receiver-stimulator for harvesting acoustic power from an acoustic field and generating electrical power, comprising: a hermetically sealed enclosure with an inner and outer surface; a first plurality of acoustic piezoelectric components which converts the acoustic field to electrical power, each piezoelectric component defined by a thickness and a base with a width and configured with the base mounted to the inner surface; a plurality of individual rectifiers, where each rectifier is electrically connected to a corresponding piezoelectric component of the first plurality of piezoelectric components such that the electrical power from the piezoelectric components is converted by the rectifiers arranged in a circuit assembly to a biologically stimulating electrical output; and at least two stimulation electrodes which receive the stimulating electrical output and deliver said output to tissue at sufficient electrical energy levels to stimulate the tissue; wherein the acoustic piezoelectric components are distributed about the inner surface along three axes such that acoustic energy is harvested efficiently from any direction of the propagating acoustic energy field.