Abstract: The invention relates to a microperforated metal foil and to a process for the preparation thereof which is characterized in that a self-supporting metal foil is perforated with a needle-punching machine.

Abstract: The invention relates to a microperforated metal foil and to a process for the preparation thereof which is characterized in that a self-supporting metal foil is perforated with a needle-punching machine.

Abstract: A sound absorbing heat shielding material includes an inner heat reflective layer, a sound absorbing layer and an outer layer. The inner heat reflective layer defines a plurality of openings therethrough in which the openings are configured to impart a high air flow resistivity on the inner heat reflective layer. The sound absorbing layer is disposed next to the heat reflective layer. The outer layer is disposed adjacent to the sound absorbing layer and opposite from the inner heat reflective layer. The outer layer defines a plurality of openings that allow air to pass therethrough.

Abstract: A trim panel for an aircraft interior includes a first sound attenuating layer, a structural layer and a second sound attenuating layer. The structural layer is coupled to the exterior sound attenuating layer, and has an exterior side and an opposite interior side. The structural layer defines a plurality of passages that open to both the exterior side and the interior side so as to minimize radiation of noise due to a hydrodynamic shortcut created by each of the passages across the structural layer. The second sound attenuating layer is coupled to the structural layer and has a high sound absorption characteristic. The second sound attenuating layer is configured to be disposed adjacent to the aircraft interior.