A microphone shield system is disclosed. The electrochemical device includes a first electrode, a second electrode, and an ion exchange membrane held between the two electrodes. The rotor includes a first rotor valve surface in communication with the first stator valve surface, a second rotor valve surface in communication with the second stator valve surface, and a plurality of flow paths for receiving adsorbent material therein. The transmitreceive antennas are preferably also embodied as structurally integrated.