Noise reduction system for composite structures

摘要

A method and apparatus comprising a composite panel and a number of structures to reduce noise radiation from the composite panel. The composite panel has a first face sheet, a second face sheet, and a core located between the first face sheet and the second face sheet. The number of structures is associated with the first face sheet. The number of structures has a mass with a configuration to reduce a speed of waves propagating in the composite panel such that noise radiating from the composite panel is reduced.

主权项

1. An apparatus comprising:
a composite panel having a first face sheet, a second face sheet, and a core located between the first face sheet and the second face sheet; and a number of structures associated with the first face sheet, the number of structures having a mass with a configuration to reduce a speed of waves propagating in the composite panel such that noise radiating from the composite panel is reduced, the number of structures comprising a number of patches attached to an inner surface of the first face sheet, the core including a number of voids, the number of patches located in the number of voids, and the number of voids and the number of patches configured to provide gaps between the number of patches and the core.