Patent ID: 8983106
Filing Date: 2015-03-17
Classification: H04R

Abstract:
1. A narrow directional microphone, comprising: a unidirectional microphone unit having a front acoustic terminal; a cylindrical acoustic tube attached to a front side of the unidirectional microphone unit and having a prescribed axial length; a film for suppressing wind noise, attached to a front side of the acoustic tube to be displaced by a wind pressure; and an acoustic resistor attached to the acoustic tube at a position further front side relative to the film such that the acoustic resistor does not contact the film even when the film is displaced by the wind pressure, wherein a rear end of the acoustic tube is coupled to the front acoustic terminal of the unidirectional microphone unit, and a front end opening of the acoustic tube is covered with the film and the acoustic resistor so that series resonance between stiffness of the film and an acoustic mass of an air column in the acoustic tube is suppressed.