Abstract: Disclosed is a method and apparatus for validating a two-way satellite communication system in an aircraft. The two-way satellite communication system may include a network access unit, a modem, and a satellite antenna assembly. A satellite link emulator may be disposed proximate the aircraft. A validation controller may initiate a validation test of the two-way satellite communication system using the satellite link emulator, including receiving, at the satellite link emulator, a transmitted uplink signal from the satellite antenna assembly, and transmitting, using the satellite link emulator, a downlink signal to the satellite antenna assembly in response to the received uplink signal. A pass/fail indication may be determined based on operation of the network access unit, the modem, and the satellite antenna assembly during the validation test.

Abstract: Disclosed is a method and apparatus for validating a two-way satellite communication system in an aircraft. The two-way satellite communication system may include a network access unit, a modem, and a satellite antenna assembly. A satellite link emulator may be disposed proximate the aircraft. A validation controller may initiate a validation test of the two-way satellite communication system using the satellite link emulator, including receiving, at the satellite link emulator, a transmitted uplink signal from the satellite antenna assembly, and transmitting, using the satellite link emulator, a downlink signal to the satellite antenna assembly in response to the received uplink signal. A pass/fail indication may be determined based on operation of the network access unit, the modem, and the satellite antenna assembly during the validation test.

Abstract: A method of manufacturing an acoustic structure is disclosed. An adhesive material and a septum forming material may be deposited on a first honeycomb ribbon. A second honeycomb ribbon may be adhered to the adhesive material and the septum forming material. The first honeycomb ribbon and the second honeycomb ribbon may be expanded to form a honeycomb structure. The septum forming material may stretch or expand to form a septum cap in a cell of the honeycomb structure. The septum forming material may be inherently porous, and/or the septum cap may be cured in order to introduce pores into the septum cap.

Abstract: A method of manufacturing an acoustic structure is disclosed. An adhesive material and a septum forming material may be deposited on a first honeycomb ribbon. A second honeycomb ribbon may be adhered to the adhesive material and the septum forming material. The first honeycomb ribbon and the second honeycomb ribbon may be expanded to form a honeycomb structure. The septum forming material may stretch or expand to form a septum cap in a cell of the honeycomb structure. The septum forming material may be inherently porous, and/or the septum cap may be cured in order to introduce pores into the septum cap.

Abstract: A passive noise attenuation system is described herein. The passive noise attenuation system may comprise an acoustic structure. The acoustic structure may comprise a perforated top sheet and a core accessible via the perforated top sheet. The core may comprise a cell having a plurality of interior walls. The acoustic structure may comprise a back skin. The acoustic structure may comprise an inherently porous material disposed between the top sheet and the back skin, wherein the porous material forms a plane or multiple planes coupled to each interior wall to tangentially subdivide the core.