Abstract: A thermo-acoustic insulation module for an aircraft includes a fiber batt defining an exterior side, an interior side, a thickness between the exterior side and the interior side, and a periphery. The thermo-acoustic insulation module also includes a mass layer disposed at least on the exterior side of the fiber batt, on the interior side of the fiber batt, or between the exterior side and the interior side of the fiber batt. An exterior encapsulating sheet is disposed exteriorly to the exterior side of the fiber batt. Similarly, an interior encapsulating sheet disposed interiorly to the interior side of the fiber batt. A peripheral seam connects the exterior encapsulating sheet to the interior encapsulating sheet adjacent to the periphery of the fiber batt, thereby creating an envelope encapsulating the fiber batt.