| 摘要 |
PROBLEM TO BE SOLVED: To suppress the failure occurrence to driving in an on-vehicle electronic equipment and an automobile with the same mounted thereon.SOLUTION: Because the optical communication between optical communication equipment 16 of headphones 12 and 13 and optical communication equipment 27 behind a driver's seat becomes failure in the state that a driver wears the headphones 12 and 13 in the driver's seat, an audio signal is not transmitted to the headphones 12 and 13, and the failure occurrence to driving is prevented as a result. Also, an improper use alarm of the headphones 12 and 13 is issued to back seat monitor 9 and 10 or the headphones 12 and 13. |
