Abstract: The present invention provides a microphone, including a protection structure with a containment space, and an ASIC chip and a MEMS microphone chip accommodated in the containment space. The microphone also includes a low pass filter circuit. The low pass filter circuit is connected between the ASIC chip and the MEMS microphone chip, or the low pass filter circuit is integrated in the ASIC chip. The high frequency cutoff frequency of the low pass filter circuit is greater than 20 khz, so that by setting the low pass filter circuit, the interference of the ultrasonic frequency band can be filtered, the noise can be reduced, and the audio quality can be improved.

Abstract: The present invention provides a MEMS microphone, including a housing body with a containment space, a sound hole penetrating the housing body, a MEMS microphone chip, an ASIC chip and a subtractor accommodated in the containment space. The MEMS microphone chip includes at least a first MEMS microphone chip and a second MEMS microphone chip. the first MEMS microphone chip is different from the frequency response droop characteristic of the second MEMS microphone chip. the first MEMS microphone chip and the output signal of the second MEMS microphone chip are output to the subtractor, and are output to the ASIC chip after the subtractor performs subtraction processing. Compared with the related art, the MEMS microphone of the present invention has good anti-interference performance and good sensitivity.