| 摘要 |
PURPOSE:To change a directional characteristic optionally as the entire of a microphone by mixing the output signal of the microphone of a non-directional characteristic and the output signal of the microphone of a superdirectional characteristics in an optional rate set by a manipulator. CONSTITUTION:A mixing circuit 13 mixes the size of the output signals of the microphone 11 of a non-directional characteristic and the microphone 12 of the superdirectional characteristic in the optional rate. When the movable terminal of a semi-fixed resistor 15 is set to a side by the manipulator 14, a lot of voice components recorded in the microphone 11 are included in the output signal from the circuit 13. On the other hand, when the movable terminal is set to a (b) side by the manipulator 14, in the output signal from the circuit 13, a lot of the sound components recorded in the microphone 12 are included. Thereby, the directional characteristic as the entire of the microphone can be changed optionally.
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