Dual audio program system
OwnerPhilip E. Eggers, Gerald J. Sandersinventors
Life of this patent
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Abstract
Dual program audio apparatus is provided having two or more sources of input audio program signals, switching circuitry for selecting two of the input audio signals for amplification, one or more amplifiers for amplifying the selected input audio program signals, and one or more audio speakers for enabling a listener to hear both audio programs simultaneously. Volume control circuitry is provided for selecting a higher volume level for a foreground program and a relatively lower volume for a background program and circuitry is provided for selectively interchanging the foreground and background programs either instantaneously or gradually and continuously.
Claims6
Apparatus for simultaneously providing dual audio programs to a listener, the apparatus comprising;
- circuitry for providing a plurality of audio programs, the circuitry including first and second circuits for receiving radio frequency transmissions;
- storage means for storing pairs of first and second frequencies;
- means for retrieving a selected one of the stored pairs of first and second frequencies and tuning the first and second circuits for receiving to the first and second frequencies, respectively;
- first listener operable program selection means for selecting a first one of the plurality of audio programs as a first audio program;
- second listener operable program selection means for selecting a second one of the plurality of audio programs as a second audio program;
- first listener operable volume selection means for setting a first audible volume setting;
- second listener operable volume selection means for setting a second audible volume setting;
- and
- means for selectively and reversibly switching between two discrete states;
- a first state in which the first audio program is played out at a volume determined by the first audible volume setting and the second audio program is played out at a volume determined by the second audible volume setting, and a second state in which the first audio program is played out at the volume determined by the second audible volume setting and the second audio program is played out at the volume determined by the first audible volume setting.
Dependencies are inferred from the claim text.