Circuit assembly for compact acoustic device

An assembly comprising:

• a housing to insert into an ear of a user;
• a printed circuit board assembly disposed within the housing;
• one or more electronic circuits disposed along the printed circuit board assembly;
• a first microphone and a second microphone disposed along the printed circuit board assembly;
• and
• an acoustic driver coupled to the printed circuit board assembly;
• the housing defining a first microphone port, a second microphone port, and an acoustic driver port;
• the first microphone port and the first microphone are oriented to define a first beam along a first axis;
• the second microphone port and the second microphone are oriented to define a second beam along a second axis, an acoustic porting device disposed between the second microphone port and the second microphone;
• the acoustic driver and the acoustic driver port are oriented to define a third beam along a third axis;
• and
• the printed circuit board assembly comprising at least one circuit board, the second microphone disposed on a first side of the at least one circuit board, the acoustic porting device disposed on a second side of the at least one circuit board.