. . . "Again, it should be noted that the decision logic 25 would switch between the omni-directional and beam forming modes of operation automatically, in response to detecting whether the mobile device 2 is positioned at-the-ear or away-from-the-ear (based on signals available from, for instance, the proximity sensor 27, inertial sensor 26, and/or a microphone or other acoustic transducer that can dete" .