Patent ID: 7742610

Claim:
An onboard audio visual system comprising: a plurality of audio visual devices; a front-seat speaker and a rear-seat speaker for outputting reproduced audio from one of said plurality of audio visual devices; a headphone for rear-seat passengers for outputting a reproduced audio separately from a reproduced audio output from the rear seat speaker, from another one of said plurality of audio visual devices arbitrarily selected by the rear-seat passengers through a rear-seat control; an operating device mounted in a front seat area in a neighborhood of a driver for performing a predetermined operation by the driver; a control device for outputting a first control signal based on the operation performed by said operating device; and a first signal attenuator for abruptly attenuating an input signal provided to said headphone separately from an input signal provided to the rear-seat speaker, in response to said first control signal such that a volume in said headphone is zero, wherein the input signal provided from one of the audio visual device to the headphone is different from the input signal provided from the other audio visual device to the rear-seat speaker.