UNIDIRECTIONAL CLOSE-TALKING MICROPHONE

摘要

[Problem] To provide a unidirectional close-talking microphone for collecting audio in a manner that reduces stress for a user by removing noise when collecting audio to such an extent that a speaker's voice can be clearly recognized, in particular, even if there is a considerable amount of unwanted noise. [Solution] Provided is a unidirectional close-talking microphone consisting of a single microphone and a noise processing means. The noise processing means consists of an impedance converter consisting of an N-channel junction field effect transistor, and an optimizer circuit for optimizing audio data. An electrical current supplied to a drain of the N-channel junction field effect transistor consisting of a grounded source is 90 to 100 μA.