A portable electronic device, comprising: a housing including a front face, the front face having a microphone inlet defined therein; and a microphone assembly, comprising: a printed circuit board, PCB, comprising a board body having at least one signal trace, the board body having a plurality of inlet openings defining a microphone inlet area, an acoustic channel; the microphone inlet area being the same size and shape as the microphone inlet in the housing of the portable electronic device; wherein the microphone inlet area and the microphone inlet in the housing are in alignment; and a microphone comprising a transducer, the microphone being mounted to the board body with the transducer proximate to a microphone aperture, the microphone being electrically connected to the at least one signal trace, wherein the microphone comprises a casing which defines an opening therein, the transducer being located inside the casing proximate to the opening in the casing; wherein the acoustic channel is defined within the board body of the PCB, the acoustic channel extends between the microphone aperture formed in the board body and a plurality of inlet openings formed in the board body, the plurality of inlet openings having a diameter between 40 μm and 80 μm, wherein the plurality of inlet openings are grouped within the microphone inlet area and arranged in a predetermined formation whereby each inlet opening is equally spaced apart from the others, wherein the microphone inlet area is configured to fit within an inside dimension of a sealing member which surrounds the microphone inlet area of the board body and seals the board body against an inner surface of the portable electronic device housing. a housing including a front face, the front face having a microphone inlet defined therein; and a microphone assembly, comprising: a printed circuit board, PCB, comprising a board body having at least one signal trace, the board body having a plurality of inlet openings defining a microphone inlet area, an acoustic channel; the microphone inlet area being the same size and shape as the microphone inlet in the housing of the portable electronic device; wherein the microphone inlet area and the microphone inlet in the housing are in alignment; and a microphone comprising a transducer, the microphone being mounted to the board body with the transducer proximate to a microphone aperture, the microphone being electrically connected to the at least one signal trace, wherein the microphone comprises a casing which defines an opening therein, the transducer being located inside the casing proximate to the opening in the casing; a printed circuit board, PCB, comprising a board body having at least one signal trace, the board body having a plurality of inlet openings defining a microphone inlet area, an acoustic channel; the microphone inlet area being the same size and shape as the microphone inlet in the housing of the portable electronic device; wherein the microphone inlet area and the microphone inlet in the housing are in alignment; and a microphone comprising a transducer, the microphone being mounted to the board body with the transducer proximate to a microphone aperture, the microphone being electrically connected to the at least one signal trace, wherein the microphone comprises a casing which defines an opening therein, the transducer being located inside the casing proximate to the opening in the casing; wherein the acoustic channel is defined within the board body of the PCB, the acoustic channel extends between the microphone aperture formed in the board body and a plurality of inlet openings formed in the board body, the plurality of inlet openings having a diameter between 40 μm and 80 μm, wherein the plurality of inlet openings are grouped within the microphone inlet area and arranged in a predetermined formation whereby each inlet opening is equally spaced apart from the others, wherein the microphone inlet area is configured to fit within an inside dimension of a sealing member which surrounds the microphone inlet area of the board body and seals the board body against an inner surface of the portable electronic device housing.