| 摘要 |
In a wireless headphone (2) in which an infra-red signal transmitted from a transmitting apparatus (1) is received and a received output is reproduced as an audible sound by headphone unit portions (11, 12), a first light receiving element is provided on a top portion (16) of a head band portion (8) so that, when a listener is wearing the wireless headphone (2), a light receiving surface of the first light receiving element is directed rearwards. Second and third light receiving elements are provided on the headphone unit portions (11, 12) so that light receiving surfaces of the second and third light receiving elements are directed forwards with respect to the listener. |
