| 摘要 |
PROBLEM TO BE SOLVED: To provide a phone system that can conduct a speech at a public place without defects of a conventional speech system. SOLUTION: The phone system includes a device 131 that is connected to a connector 132 sending a voice to a phone and acting like an impedance matching circuit and a mobile phone 130 connected to the device 131. The device 131 is a physical interface having buttons labeled as respective conversation expressions and may be an electronic recording and reproducing device. The mobile phone 130 has a hands-free earphone. A voice recording and reproduction chip in the device 131 stores a voice accessible via the labeled control button. The chip is connected to a phone input via the connector 132. Both the earphone and the mobile phone via a telephone line can hear the generated conversation but people around the user cannot hear the speech.
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