Abstract: A method of communicating of the present invention includes broadcasting a signal from a transmission point. The power of the signal is limited such that the signal will attenuate within a predetermined distance from the transmission point. The signal is received by a receiver. A communication system includes a transmitter and a receiver. The transmitter is adapted to broadcast a first signal which attenuates within a predetermined distance from the transmitter. The receiver is adapted to receive the first signal. The method and system can be used to imperceptibly transmit voice data.

Abstract: A communication device includes an earpiece housing adapted for fitting to an ear of a user such that the earpiece does not block the canal, an inertial sensor operatively connected to the earpiece housing for sensing positional changes of the user's ears, a processor operatively connected to the inertial sensor and disposed within the earpiece determining presence of an alert condition at least partially based on positional changes, and a speaker operatively connected to the processor.

Abstract: A voice communication device including an earpiece adapted to be inserted into the external auditory canal of a user is disclosed. The earpiece is smaller than the interior of the external auditory canal and the earpiece does not block the canal. The earpiece includes one or more sensors disposed within the earpiece to sense vibrations. In one embodiment, the earpiece includes a processor disposed within the earpiece and operatively connected to each of the sensors, and a transmitter operatively connected to the processor.