Fairings for power generation machines

A fairing for a power generation machine, the fairing comprising:

• a first layer comprising a metallic material and defining a first surface and an opposite second surface, the first layer being configured for coupling the fairing to the power generation machine via one or more fasteners, wherein the first surface of the first layer has a concave shape, and wherein the first layer defines one or more receptacles open to the power generation machine;
• a second layer comprising a composite material, wherein the second layer defines a first surface and a second opposite surface, the second surface of the second layer defining an external surface of the fairing, the second surface of the second layer having a convex shape;
• and
• a third layer positioned within the one or more receptacles, the third layer being configured to attenuate acoustic waves over a predetermined frequency range.