A silencer duct (102, 202, 302), comprising: a duct body including: an upstream end; a downstream end positioned opposite the upstream end; a first side extending between the upstream end and the downstream end; and a second side extending between the upstream end and the downstream end, opposite the first side, wherein the duct body is axially curved between the upstream end and the downstream end; and a plurality of tubes extending axially through the duct body, each of the plurality of tubes including: a first end positioned adjacent to and in direct fluid communication with the upstream end of the duct body; a second end positioned adjacent to and in direct fluid communication with the downstream end of the duct body; acoustic absorbing material positioned within the duct body, adjacent and surrounding each of the plurality of tubes, the acoustic absorbing material at least partially filling the duct body; a first coupler extending axially from the first side of the duct body, the first coupler extending from the upstream end of the duct body to the downstream end of the duct body; and a second coupler extending axially from the second side of the duct body, the second coupler extending from the upstream end of the duct body to the downstream end of the duct body, wherein at least one of the first coupler and the second coupler are configured to couple to at least one of an adjacent silencer duct and an inlet structure frame. a duct body including: an upstream end; a downstream end positioned opposite the upstream end; a first side extending between the upstream end and the downstream end; and a second side extending between the upstream end and the downstream end, opposite the first side, wherein the duct body is axially curved between the upstream end and the downstream end; and an upstream end; a downstream end positioned opposite the upstream end; a first side extending between the upstream end and the downstream end; and a second side extending between the upstream end and the downstream end, opposite the first side, wherein the duct body is axially curved between the upstream end and the downstream end; and a plurality of tubes extending axially through the duct body, each of the plurality of tubes including: a first end positioned adjacent to and in direct fluid communication with the upstream end of the duct body; a second end positioned adjacent to and in direct fluid communication with the downstream end of the duct body; acoustic absorbing material positioned within the duct body, adjacent and surrounding each of the plurality of tubes, the acoustic absorbing material at least partially filling the duct body; a first coupler extending axially from the first side of the duct body, the first coupler extending from the upstream end of the duct body to the downstream end of the duct body; and a second coupler extending axially from the second side of the duct body, the second coupler extending from the upstream end of the duct body to the downstream end of the duct body, wherein at least one of the first coupler and the second coupler are configured to couple to at least one of an adjacent silencer duct and an inlet structure frame. a first end positioned adjacent to and in direct fluid communication with the upstream end of the duct body; a second end positioned adjacent to and in direct fluid communication with the downstream end of the duct body; acoustic absorbing material positioned within the duct body, adjacent and surrounding each of the plurality of tubes, the acoustic absorbing material at least partially filling the duct body; a first coupler extending axially from the first side of the duct body, the first coupler extending from the upstream end of the duct body to the downstream end of the duct body; and a second coupler extending axially from the second side of the duct body, the second coupler extending from the upstream end of the duct body to the downstream end of the duct body, wherein at least one of the first coupler and the second coupler are configured to couple to at least one of an adjacent silencer duct and an inlet structure frame.