| 摘要 |
PROBLEM TO BE SOLVED: To easily hear the sound of a received speech by expanding a reach of a call-incoming sound in a portable telephone set. SOLUTION: The portable telephone set comprising a microphone, a speaker generating the call-incoming sound and a receiver for receiving the speech has the structure of mounting a directional speaker to the speaker generating the call-incoming sound and mounting a speaker for generating sound nearly vertically to the surface of the receiver to a speaker for the receiver. COPYRIGHT: (C)2003,JPO
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