Patent ID: 8774438
Filing Date: 2014-07-08
Classification: H04R

Abstract:
1. A microphone unit comprising: a diaphragm vibrating in response to sound waves; a unit casing accommodating the diaphragm; a front acoustic terminal connected to the front of the diaphragm; a rear acoustic terminal connected to the rear of the diaphragm; and at least one connecting path connecting the front acoustic terminal and the rear acoustic terminal, wherein the microphone unit converts vibration of the diaphragm into audio signals, wherein the unit casing comprises: wherein the unit casing has a first groove in an axial direction provided in the large-diameter internal periphery and a second groove in a radial direction provided in the shoulder, the second groove in the radial direction being in communication with the first groove in the axial direction, and wherein the first groove in the axial direction and the second groove in the radial direction configure the at least one connecting path.