STEREOPHONIC NARROW DIRECTIVITY MICROPHONE

摘要

PROBLEM TO BE SOLVED: To provide a stereophonic narrow directivity microphone that picks up voice of a cameraman as less as possible when the microphone is mounted especially on a television camera. ;SOLUTION: An acoustic tube 10 contains a unidirectional microphone unit 20 and a bidirectional microphone unit 30 inside, and when a main signal M outputted from the unidirectional microphone unit 20 and directional signal S outputted from the bidirectional microphone unit 30 are given to a matrix circuit 40 to obtain an L channel signal (M+S) and an R channel signal (M-S), the bidirectional microphone unit 30 is placed at the tip of the acoustic tube 10 apart from the unidirectional microphone unit 20, and the directional signal S outputted from the bidirectional microphone unit 30 is given to a delay circuit 41 that delays the signal S by a sound time difference caused by a distance between the microphones 20 and 30 and the delayed signal is given to the matrix circuit 40.;COPYRIGHT: (C)2003,JPO