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Control device for an audio communication system

  • US 20040156514A1
  • Filed: 02/07/2003
  • Published: 08/12/2004
  • Est. Priority Date: 02/07/2003
  • Status: Abandoned Application
First Claim
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1. An audio communication system for a vehicle comprising:

  • a primary audio source producing a primary audio signal;

    a secondary audio source producing a secondary audio signal;

    a speaker;

    a vehicle ignition switch having an on position and an off position;

    a relay, said primary and secondary audio sources alternatively transmissibly connected to said speaker by said relay;

    wherein said relay receives said primary audio signal and transmits substantially said primary audio signal to said speaker when said vehicle ignition switch is in said on position and said secondary audio signal is not present;

    wherein said relay receives said primary and secondary audio signals and transmits substantially said secondary audio signal to said speaker when said vehicle ignition switch is in said on position; and

    wherein said relay receives said secondary audio signal and transmits substantially said secondary audio signal to said speaker for a predetermined period of time after said vehicle ignition switch has been switched from said on position to said off position.

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