| 摘要 |
PROBLEM TO BE SOLVED: To provide a mobile terminal device capable of reducing leak of transmitting voice and receiving voice to outside. SOLUTION: The mobile terminal device includes: a microphone for detecting the transmitting voice of a user; a receiver for outputting the receiving voice from a calling place; a creating section for creating a transmission anti-phase signal of an anti-phase having the same frequency component with the transmission voice, and a receiving anti-phase signal of an anti-phase having the same frequency component with the receiving voice; and a speaker for outputting the transmission anti-phase signal and the receiving anti-phase signal, in voice. COPYRIGHT: (C)2008,JPO&INPIT
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