| 摘要 |
PROBLEM TO BE SOLVED: To obtain the portable telephone system and the speech device used for it where one earphone is used for the receiver of a portable telephone set, an incoming tone sounder and a receiver for a portable audio reproducing device in common and only a received voice is clearly heard in the case of call reception. SOLUTION: A received voice signal and an incoming call signal from a portable telephone set 40 and an output voice signal from a portable audio player 50 are given to a speech device 10, from which the signal is sent to a remote control transmitter-receiver 20 as a radio wave and received by a radio signal reception circuit 22 and sent to each section via an interface circuit 24. An incoming signal from the portable telephone set 40 is detected by a detection circuit 12 and sent to the remote control transmitter-receiver 20, together with the sound through an earphone, drives a vibrator 33 to notify the arrival of an incoming call to the portable telephone set 40. When the user depresses a switch 27, the portable telephone set 40 is set to a speech state and makes a speech by using the earphone 31 and a microphone 32. |
