A microphone comprising: a casing having a first side open and a second side closed, wherein the first side is configured to be coupled to a substrate comprising a first hole and a second hole to which audio signals are input, to form a resonant space within the casing, a first audio generator configured to convert an audio signal, input through the first hole of the substrate when the first side of the casing is coupled to the said substrate, into an electrical signal, wherein the first audio generator comprises a first plate and first membrane spaced apart from each other, a second audio generator configured to convert an audio signal, input through the second hole of the substrate when the first side of the casing is coupled to the said substrate, into an electrical signal, wherein the second audio generator comprises a second plate and second membrane spaced apart from each other, wherein a sensitivity of the first audio generator is smaller than a sensitivity of the second audio generator, a noise barrier positioned between the first audio generator and the second audio generator, wherein the noise barrier has a first side coupled to the casing and a second side configured to be coupled to the substrate and separates spaces of the first audio generator and the second audio generator, and a signal processor electrically connected to the first audio generator and the second audio generator and configured to analyze electrical signals transmitted by the first audio generator and the second audio generator and to remove a noise signal exceeding a threshold by performing the steps of: detecting a signal exceeding a threshold in the electrical signals transmitted by the first audio generator and the second audio generator; amplifying the signal exceeding the threshold when the electrical signal input through the first audio generator exceeds the threshold; inverting the amplified signal; transmitting the inverted amplified signal to the second audio generator; and removing an audio signal corresponding to the electrical signal exceeding the threshold by controlling, based on the inverted signal, a movement of the second audio generator to a given level. a casing having a first side open and a second side closed, wherein the first side is configured to be coupled to a substrate comprising a first hole and a second hole to which audio signals are input, to form a resonant space within the casing, a first audio generator configured to convert an audio signal, input through the first hole of the substrate when the first side of the casing is coupled to the said substrate, into an electrical signal, wherein the first audio generator comprises a first plate and first membrane spaced apart from each other, a second audio generator configured to convert an audio signal, input through the second hole of the substrate when the first side of the casing is coupled to the said substrate, into an electrical signal, wherein the second audio generator comprises a second plate and second membrane spaced apart from each other, wherein a sensitivity of the first audio generator is smaller than a sensitivity of the second audio generator, a noise barrier positioned between the first audio generator and the second audio generator, wherein the noise barrier has a first side coupled to the casing and a second side configured to be coupled to the substrate and separates spaces of the first audio generator and the second audio generator, and a signal processor electrically connected to the first audio generator and the second audio generator and configured to analyze electrical signals transmitted by the first audio generator and the second audio generator and to remove a noise signal exceeding a threshold by performing the steps of: detecting a signal exceeding a threshold in the electrical signals transmitted by the first audio generator and the second audio generator; amplifying the signal exceeding the threshold when the electrical signal input through the first audio generator exceeds the threshold; inverting the amplified signal; transmitting the inverted amplified signal to the second audio generator; and removing an audio signal corresponding to the electrical signal exceeding the threshold by controlling, based on the inverted signal, a movement of the second audio generator to a given level. detecting a signal exceeding a threshold in the electrical signals transmitted by the first audio generator and the second audio generator; amplifying the signal exceeding the threshold when the electrical signal input through the first audio generator exceeds the threshold; inverting the amplified signal; transmitting the inverted amplified signal to the second audio generator; and removing an audio signal corresponding to the electrical signal exceeding the threshold by controlling, based on the inverted signal, a movement of the second audio generator to a given level.