Patent ID: 8917897

Claim:
A microphone, comprising: a circuit board; a supporting member, mounted on a top surface of the circuit board; an acoustic sensor, mounted on the supporting member; a signal processing circuit, accommodated inside a hollow that is formed inside the supporting member, and mounted on the top surface of the circuit board; and a cover, covering the acoustic sensor, the supporting member, and the signal processing circuit and fixed to the top surface of the circuit board, wherein the acoustic sensor is formed with a first space to serve as a front chamber on a top surface side of the acoustic sensor, wherein the first space is inside the acoustic sensor, and the acoustic sensor is also provided with a second space to serve as a back chamber on the under surface side of the acoustic sensor, and the supporting member is formed with an acoustic transmission path capable of transmitting an acoustic vibration between a third space located outside the acoustic sensor and the supporting member and surrounded by the cover and the circuit board, and the second space to serve as the back chamber inside the acoustic sensor wherein the top surface side of the acoustic sensor is bonded to an inner surface of the cover to prevent leaking of acoustic vibration from, the first space to serve as the front chamber, to the third space located outside the acoustic sensor and the supporting member and surrounded by the cover and the circuit board.