| 摘要 |
PURPOSE: An ear microphone is provided to improve the quality of a voice signal transmitted to the other party by eliminating a noise signal included in an output signal of a microphone. CONSTITUTION: A first microphone(130) changes a voice signal of a user into a first electrical signal. A second microphone(135) changes an external noise signal into a second electric signal. A signal processor(170) receives the first electrical signal and the second electric signal. The signal processor eliminates a noises signal included in the first electrical signal using the second electric signal. A phase of the second electric signal is opposite to that of the external noise signal. The signal processor includes an adder for adding the first electrical signal and the second electric signal. [Reference numerals] (AA) External auditory meatus |
