Patent ID: 7158842

Claim:
An audio system that reproduces contents information as sound in a vehicle comprising: a portable audio apparatus carried by a passenger of said vehicle; and an audio apparatus mounted in said vehicle, wherein said portable audio apparatus includes a contents information storage medium for retaining contents information, and a transmission module for transmitting said contents information to said audio apparatus at least by radio communication, wherein said audio apparatus includes a reception model for receiving said contents information from said portable audio apparatus by radio communication, a storage medium for storing said contents information received by said reception module, a control unit for reproducing said contents information stored in said storage medium and outputting the reproduced contents information as sound from speakers mounted in said vehicle, and a detection unit for detecting whether a passenger of said vehicle has gotten off the vehicle or not, wherein said control unit includes an erasure module for erasing information stored in said storage medium according to the detection of said detection unit that a passenger of said vehicle has gotten off the vehicle.