Acoustical noise reduction and distributed airflow in electrical equipment

A method of performing acoustical noise reduction and distributing airflow, the method comprising:

• providing a server rack door having a first dimension and a second dimension orthogonal to the first dimension, the server rack door including:
• a first group of first obstructions arranged along the first dimension, the first obstructions defining a first plurality of flow channels, wherein an obstruction of the first group of obstructions includes a first acoustic reflective structure that at least partially encapsulates a first acoustic absorbing material, wherein the first acoustic reflective structure includes a first polygonal shape;
• a second group of second obstructions arranged along the first dimension and offset from the first obstructions along the second dimension, wherein the second dimension corresponds to a thickness of the server rack door, wherein the second obstructions define a second plurality of flow channels, wherein the first obstructions and the second obstructions alternate along the first dimension, wherein the second group of obstructions includes a second acoustic reflective structure that at least partially encapsulates a second acoustic absorbing material, and wherein the second reflective structure includes a second polygonal shape that is different than the first polygonal shape;
• and
• providing a plenum region to receive an airflow from the second plurality of flow channels.

A method of performing acoustical noise reduction and distributing airflow, the method comprising:

• providing a server rack door having a first dimension and a second dimension, the server rack door comprising:
• a first group of first obstructions arranged along the first dimension, the first obstructions defining a first plurality of flow channels, wherein an obstruction of the first group of obstructions includes a first acoustic reflective structure that at least partially encapsulates a first acoustic absorbing material, wherein the first acoustic reflective structure includes a first polygonal shape;
• and
• a second group of second obstructions arranged along the first dimension and offset from the first obstructions along the second dimension orthogonal to the first dimension, wherein the second dimension corresponds to a thickness, wherein the second obstructions define a second plurality of flow channels, wherein the first obstructions and the second obstructions alternate along the first dimension, wherein the second group of obstructions includes a second acoustic reflective structure that at least partially encapsulates a second acoustic absorbing material, and wherein the second reflective structure includes a second polygonal shape that is different than the first polygonal shape;
• and
• providing a plenum region to receive an airflow from the second plurality of flow channels.