Sound absorbing aircraft transparency and method of making same

摘要

The present invention relates to a vibration dampening/sound absorbing aircraft transparency (20) which includes an outboard pane assembly (26), a vibration dampening/sound absorbing pane assembly (28) and a spacer frame assembly (30) for retaining the outboard pane assembly (26) and the vibration dampening/sound absorbing pane assembly (28) in spaced-apart generally parallel facing relationship to provide a space (32) therebetween. The vibration dampening/sound absorbing pane assembly (28) is a multilayer laminate which includes a substrate (40), an adhesive interlayer (42) provided over a surface of the substrate (40) and a sound dampening material layer (44) provided over the adhesive interlayer (42) and adhered by the adhesive interlayer (42) to the substrate (40). In an alternative embodiment, the aircraft transparency (60) of the present invention includes in addition to the foregoing, a transparent electroconductive coating (64) interposed between the adhesive interlayer (42) and the substrate (40) and facilities (66,68) in contact with the electroconductive coating (64) to pass a current through the electroconductive coating (64) to heat the coating sufficiently to remove or to prevent the accumulation of fog, ice, frost and the like on the aircraft transparency (60).