Acoustic apparatus and method of manufacturing

A microphone assembly comprising includes a base, at least one side wall, and a cover. The at least one side wall is disposed on the base. The cover is coupled to the at least one side wall. The base, the side wall, and the cover form a cavity and the cavity has a MEMS device disposed therein. A top port extends through the cover and a first channel extends through the side wall. The first channel is arranged so as to communicate with the top port. A bottom port extends through the base. The MEMS device is disposed over the bottom port. A second channel is formed and extends along a bottom surface of the base. The second channel extends between and communicates with the first channel and the bottom port. Sound energy received by the top port passes through the first channel, the second channel, and the bottom port and is received at the MEMS device.