Composite structure for noise insulation applicable to broadband frequencies and multiple composite sheet including the same

Abstract

Provided is a composite structure for noise insulation and a multiple composite sheet including the same. The composite structure may include a first sheet layer including first hexagonal cells forming a hexagonal pattern, an elastic film layer laminated on the first sheet layer and including polymers, and a second sheet layer laminated on the elastic film layer and including second hexagonal cells forming a hexagonal pattern. The first hexagonal cell has a center at which a point where vertices of a plurality of second hexagonal cells are joined is located.

Dependencies are inferred from the claim text.