The invention provides a microphone coupler system for a communication device. The coupler system comprises: a microphone; a printed circuit board (PCB) to connect to the microphone; a platform having an aperture; a boot assembly to enclose the microphone and to direct acoustic signals to the microphone; and an acoustic channel formed in part by the boot assembly and a bottom surface of the platform when the boot assembly is mounted over the microphone and the platform is mounted over the boot assembly. The boot assembly has a coupling section shaped to hold the microphone with the aperture facing upward from the PCB and a lateral rib extending around its exterior to mate with an interior surface of the platform.