Patent ID: 8483421
Filing Date: 2013-07-09
Classification: H04R

Abstract:
1. A narrow-angle directional microphone that includes an acoustic tube, comprising a circumferential wall in which an opening is formed and to a rear end of which a microphone unit is connected, and a cylindrical microphone case that accommodates the acoustic tube, the narrow-angle directional microphone comprising: a first acoustic resisting material that is provided on an outer circumferential surface of the acoustic tube and covers the opening; and a second acoustic resisting material that is provided between the first acoustic resisting material and an inner circumferential surface of the microphone case and has a predetermined elastic force in the thickness direction, wherein the second acoustic resisting material covers the first acoustic resisting material, is fixed to the acoustic tube, and presses the outer circumferential surface of the acoustic tube and the inner circumferential surface of the microphone case by the elastic force.