Patent ID: 9641939
Date: 2017-05-02
CPC Classifications: H04R

Claim:
1. An acoustic transducer, comprising: a stationary electrode plate; and a vibration electrode plate facing the stationary electrode plate with a space between the electrode plates, the vibration electrode plate including a slit that allows sound to pass through, wherein the slit includes a straight portion that extends substantially parallel to a peripheral side of the vibration electrode plate, the vibration electrode plate includes a resistance increasing section that increases resistance to passage of sound through the slit, and the resistance increasing section includes at least one pair of high-resistance surfaces that constitute side surfaces of the slit in a width direction and are thicker than a middle portion of the vibration electrode plate, and the high-resistance surfaces overlap in the width direction of the slit; and the resistance increasing section extends along the straight portion of the slit.