Patent ID: 7489967

Claim:
An implantable medical device adapted to be communicatively coupled to a second medical device, the implantable medical device comprising: a cardiac rhythm management (CRM) device; an acoustic communication circuit coupled to the CRM device, the acoustic communication circuit including at least one of a data transmitter adapted to transmit an outgoing acoustic signal to the second medical device and a data receiver adapted to receive an incoming acoustic signal from the second medical device; an acoustic transducer coupled to the acoustic communication circuit, the acoustic transducer configured to be an acoustic coupler for acoustic communication including transmitting the outgoing acoustic signal to the second medical device and receiving the incoming acoustic signal from the second medical device; an implantable housing including a wall forming a chamber to contain the CRM device and the acoustic communication circuit; and a diaphragm connected to the wall and configured to have a resonant frequency approximately equal to a carrier frequency used in the acoustic communication, wherein the wall of the implantable housing comprises an interior surface and an exterior surface, the interior surface facing the chamber, and wherein the diaphragm is connected to the exterior surface to form a cavity between the diaphragm and the exterior surface, and wherein the acoustic transducer is connected to the diaphragm within the cavity.