Soundproof structure
AssigneeFUJIFILM Corporation
InventorsShinya HAKUTA, Shogo YAMAZOE
Life of this patent
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Abstract
There is provided a laminated soundproof structure formed by laminating a single layer soundproof structure having one or more soundproof cells which are arranged in a two-dimensional plane and each of which includes a frame, a film, and an opening portion including a hole or includes a frame and a film. The single layer soundproof structure has a shielding peak frequency, which is determined by the opening portion of each of the soundproof cells and at which a transmission loss is maximized, on a lower frequency side than a first natural vibration frequency of the film of each of the soundproof cells. The conditions of at least one of the frame, the film, or the opening portion in the laminated one and other soundproof cells are different.
Claims16
A laminated soundproof structure formed by laminating a single layer soundproof structure having one or more soundproof cells arranged in a two-dimensional plane,
- wherein each of the one or more soundproof cells of the single layer soundproof structure comprises a frame having a through-hole, a film fixed to the frame, and an opening portion configured to include one or more holes drilled in the film,
- the single layer soundproof structure has a basic shielding peak frequency, which is determined by the opening portion of each of the one or more soundproof cells and at which a transmission loss is maximized, on a lower frequency side than a first natural vibration frequency of the film of each of the one or more soundproof cells,
- one or more of the soundproof cells of one of the laminated single layer soundproof structures and one or more other soundproof cells of the other laminated single layer soundproof structure are laminated,
- each of the one or more other soundproof cells is configured to include the frame, the film, and the opening portion or the frame and the film, and
- at least some of the one or more other soundproof cells are different from the one or more of the laminated soundproof cells in conditions of at least one of the frame, the film, or the opening portion.
Dependencies are inferred from the claim text.