Patent ID: 7190799

Claim:
An audio signal processing system for a vehicle, the system comprising: at least two radios operating on at least two non-interfering radio frequencies to produce at least two radio audio output signals and at least two radio squelch control signals; at least one microphone for receiving spoken audio and for producing a radio transmit control signal and a microphone audio output signal; an audio router having a plurality of audio router output ports and a plurality of audio router input ports, wherein the audio router input ports are connected to the at least one microphone and the at least two radios for receiving the at least two radio audio output signals, the microphone audio output signal and the at least two radio squelch control signals; a processor in communication with the audio router for monitoring the at least two radio squelch control signals and the radio transmit control signal to determine which of the at least two radio audio output signals and the microphone audio output signal received by the audio router to route to the plurality of audio router output ports and to determine which of the at least two radio squelch control signals and the radio transmit control signal the router should activate to one of the radios, in order to transmit the audio output signal that corresponds to the activated control signal; an audio mixer connected to the plurality of audio router output ports for receiving and combining the at least two radio audio output signals, wherein the audio mixer spatially separates the at least two radio audio output signals and controls the volume of the at least two radio audio output signals; and at least two speakers for broadcasting the at least two spatially separated radio audio output signals to a vehicle occupant.