MEMS microphone

The utility model provides a MEMS microphone, include and surround the packaging structure who forms by shell and circuit board, the inside sound division board that is equipped with of packaging structure, the sound division board divide into the into operatic tunes and back cavity with packaging structure, be equipped with MEMS sound electric chip and ASIC chip on the circuit board internal surface of back cavity, MEMS sound electric chip, connect through the metal wire electricity between ASIC chip and the circuit board, it is equipped with hole on the shell of the operatic tunes to advance, the inside passageway that is equipped with of circuit board, the MEMS sound electric chip of passageway in with the back cavity with advance operatic tunes intercommunication, advance to be equipped with the extension that blocks external air current on the circuit board internal surface of the operatic tunes and to block the piece. Block and get into the into great air current of the operatic tunes by the sound hole through setting up on the circuit board internal surface advancing the operatic tunes, and then to prevent that great air current from passing through the inside passageway direct action of circuit board and on MEMS sound electric chip, ensureing that MEMS sound electric chip does not receive the influence of too big air current, to play the corresponding effect of high frequency of adjusting the microphone simultaneously.