| 摘要 |
PROBLEM TO BE SOLVED: To arbitrarily change the frequency of a received voice corresponding to the feeling of hearing for the user of a telephone set by adding a circuit, with which a received voice frequency converting part is controlled, to a receiver circuit. SOLUTION: A receiver circuit 1 electrically grasps a received signal received from the side of a speaking party. A received voice frequency converting part 2 is controlled by a control signal from an external terminal, converts the signal processed by the receiver circuit 1 to any arbitrary frequency easy to listen to for the feeling of hearing of the user, sends that signal to a speaker 11 of a receiver and reproduces the voice. A frequency conversion level is held in the memory of the received voice frequency converting part 2 and until speaking is finished or the level is reset during speaking, that set conversion level is held. Thus, since the received voice frequency converting part 2 is added to the configuration of a conventional telephone set, arbitrary control is enabled to the received voice frequency easy to listen to for the feeling of hearing of the user of the telephone set corresponding to an external noise level. |
