Sound absorbing aircraft transparency and method of making same

Abstract

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

Dependencies are inferred from the claim text.