Patent attributes
The present invention provides a directional MEMS microphone and a receiver device wherein MEMS microphone comprises a microphone cover, a printed circuit board (PCB), a application specific integrated circuit (ASIC) chip, a MEMS die, a diaphragm, a damping, a metal wire(s), at least two internal acoustic ports and at least two external acoustic ports corresponding to the internal acoustic ports. The microphone further comprises a tuning cavity which includes a first tuning cavity by which a first internal acoustic port is communicated with a first external acoustic port, or by which a second internal acoustic port is communicated with a second external acoustic port. Compared with the prior art, the directional MEMS microphone including the tuning cavity to form a sound transmission channel by connecting the internal acoustic port and the external acoustic port expands the sound transmission distance, thereby increasing the sensitivity the directivity of the MEMS microphone.
