| 摘要 |
When a controller receives an incoming call signal, the controller supplies melody information stored in a melody information storage to a sound source. The sound source starts to output a melody, represented by the melody information, from a speech speaker. When an input unit accepts a talk start command, the controller operates a superimposer. The superimposer superimposes a melody signal on a speech signal, and a speech speaker outputs a superimposed sound.
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