Patent ID: 9584902
Date: 2017-02-28
CPC Classifications: H04R

Claim:
1. A dynamic microphone comprising: a dynamic microphone unit including a diaphragm including a voice coil and a magnetic circuit including a magnetic gap, the voice coil being disposed in the magnetic gap so as to vibrate; a bottomed case coupled to the dynamic microphone unit and forming a back-side air chamber communicating with a back side of the diaphragm; and an acoustic resistance body formed of metal fiber including a pocket and attached to an inside of the case, the pocket being formed to have an open cross sectional area gradually decreasing toward a direction remote from the dynamic microphone unit, wherein the pocket is a concave formed in the acoustic resistance body and having said open cross sectional area gradually decreasing from an upper portion of the acoustic resistance body in the direction remote from the dynamic microphone unit.