Sound-absorbing structure using thin film

摘要

A sound-absorbing structure using thin film of the present invention includes at least a first thin film ( 11 ) and a second thin film ( 12 ), the first thin film ( 11 ) and the second thin film ( 12 ) being layered over each other and one or both of the first thin film ( 11 ) and the second thin film ( 12 ) having at least either ridges or grooves (ridges (a) in the selected figure). As each of the thin films ( 11 ) and ( 12 ), a metallic thin film or a resinous thin film is employable. It is desirable that fine through holes are formed in a large number in the thin films ( 11 ) and ( 12 ).