US Patent 7899466 GPS microphone for communication system

A communication apparatus, such as a GPS microphone, which is adapted for incorporating a communication system, includes a communication unit such as a speaker-microphone set, a communication transmitter such as a radio frequency transmitter communicatively networked with the communication system through radio frequency signals, and a positioning controller such as a GPS controller electrically connected with the radio frequency transmitter to encode a positioning data into a RF positioning signal in form of audio signal wherein when the GPS controller is triggered, the radio frequency transmitter is activated to transmit RF positioning signal to the communication system.