Multi-dimensional array microphone

An array microphone, comprising:

• a plurality of microphone boards arranged in a first linear pattern along a first axis of the array microphone, the plurality of microphone boards comprising a plurality of microphone elements configured to cover a plurality of frequency bands, each microphone board comprising:
• a first microphone element of the plurality of microphone elements located on the first axis;
• one or more second microphone elements of the plurality of microphone elements located on a second axis of the microphone board, the second axis being orthogonal to the first axis;
• and
• one or more third microphone elements of the plurality of microphone elements located on a third axis of the microphone board, the third axis being orthogonal to the first axis and to the second axis,
• wherein the first microphone elements of the plurality of microphone boards are configured to form the first linear pattern along the first axis, and
• for each microphone board, the first microphone element and the one or more second microphone elements are configured to form a second linear pattern along the second axis of the corresponding microphone board, and the first microphone element and the one or more third microphone elements are configured to form the second linear pattern along the third axis of the corresponding microphone board.