| 摘要 |
PROBLEM TO BE SOLVED: To allow a plurality of persons to listen to same audio information comparatively simply at the same time by providing a jack terminal connected in parallel with a transducer to convert an electric signal into an audio signal. SOLUTION: A light receiving section 6 receives an optical signal emitted from, e.g. an infrared ray transmitter 3 connecting to an audio equipment 2 and transduces it into an audio signal in a wireless headphone set 1. A reception transducing circuit and a battery or the like are built in housings 11, 12. Jack terminals 9, 10 are provided to a lower part of the housings 11, 12 and connected in parallel with an output of the reception transducing circuit. Figure indicates it that an inexpensive non-wireless headphone 18 provided with a stereo plug 17 is connected to the jack terminal 10 and another non-wireless headphone is connected to the jack terminal 9 to allow three persons to listen to same audio information at the same time. |
