PANEL FOR ABSORBING ACOUSTIC ENERGY

摘要

Lightweight acoustic absorbers (10). The acoustic absorbers (10) absorb energy during launch of a vehicle by a rocket, and are adapted to line the inside of a cavity of a fairing containing a vehicle. The absorbers (10) comprise acoustic absorbing members (20), and a layer (30) substantially surrounding the acoustic absorbing member which is substantially impermeable to contaminating particulates found within the fairing, and substantially impermeable to any contaminants which may be emitted by the acoustic absorbing members (20). A plurality of vents (40) are cut in the layer, and a filter (50) is placed over the vents (40) to filter out any contaminants. The vents (40) allow the gases within the fairing and the acoustic absorbing member to pass therethrough, thereby compensating for differential pressure.