Patent ID: 7254368

Claim:
An audio system, comprising: a head attachment audio unit having a reproduction portion configured to reproduce audio information stored in a memory portion and an output portion configured to output sound according to the reproduced audio information; and a remote control unit having a plurality of operation buttons, each operation button configured to implement a corresponding one of a plurality of operation modes for audio reproduction, the plurality of operation modes comprising a start reproducing audio information mode, a stop reproducing audio information mode, a reversing mode and a fast forwarding mode, the remote control unit configured to transmit a control signal that controls the plurality of operation modes for audio reproduction of the reproduction portion, the remote control unit transmitting the control signal to the head attachment audio unit via a wireless connection, wherein the remote control unit comprises a transmitter configured to transmit the control signal, the transmitter comprising an antenna configured to transmit electromagnetic waves; and a shield unit in which the antenna is disposed, the shield unit having an opening at a prescribed position thereof and which is configured to allow the electromagnetic waves to be transmitted out therefrom, wherein the head attachment audio unit further comprises a response portion configured to return response signal corresponding to the control signal to the remote control unit, and the remote control unit further comprises a reception portion configured to receive the response signal.