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AssigneesRion Co., Ltd., Kobayashi Institute of Physical Research
InventorsHidekazu Kodama, Munehiro Date, Pavel Mokry, Kazunori Kimura, Tomonao Okubo, Eiichi Fukada
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A sound insulation/absorption structure, a sound insulation/absorption device, and a structure having these applied thereto and a member constituting the same, are capable of insulating or absorbing sound by stiffness control. The sound insulation/absorption structure comprises a film member, such as a polymer film or metal foil, and a frame body having at least one annular opening, the film member being fixed to the frame body, the section of the film member surrounded by the frame body being of a curved shape such as a dome, wherein the resonance frequency of the in-plane stretching of this curved shape is set at a frequency equal to or higher than the audible frequency band, so as to insulate or absorb sound by the elastic force of the film. The film member may be replaced by an acrylic, polyethylene terephthalate or other plastic plate, an aluminum or other metal plate, or a veneer or other plate member, molded into a curved shape, such as a dome, a semi-cylinder and a cone.
A sound insulation/absorption structure having a film member formed of at least one of polymer and metal, wherein the film member is formed into a curved shape such as a dome, a barrel, and a cone, a periphery of this curved shape is fixed to another structure, and a resonance frequency of the curved shape in in-plane stretching is set at a frequency equal to or higher than an audible frequency band to insulate or absorb sound by elastic force of the film member.
A sound insulation/absorption structure comprising a film member formed of at least one of polymer and metal, and a frame body having at least one opening of a lattice, honeycomb or annular shape, wherein the film member is fixed to the frame body, a section of the film member surrounded by the frame body is formed into a curved shape such as a dome, a barrel, and a cone, and a resonance frequency of the curved shape in in-plane stretching is set at a frequency equal to or higher than an audible frequency band to insulate or absorb sound by elastic force of the film member.
A sound insulation/absorption structure comprising a film member, a frame body, an elastic body, and a supporting plate, wherein the elastic body and the film member are disposed on the supporting plate to be pressed with the frame body so that the elastic body and the film member are held between the frame body and the supporting plate to apply a tensile force to the film member, the film member is formed into a curved shape such as a dome, and a resonance frequency of the curved shape in in-plane stretching is set at a frequency equal to or higher than an audible frequency band to insulate or absorb sound by elastic force of the film member.
A sound insulation/absorption structure comprising two film members, a frame body, and an elastic body, wherein the elastic body is placed between the two film members, the elastic body and the two film members are held between the frame body to apply a tensile force to the two film members, the two film members are respectively formed into a curved shape, and a resonance frequency of the curved shape in in-plane stretching is set at a frequency equal to or higher than an audible frequency band to insulate or absorb sound by elastic force of the film.
Dependencies are inferred from the claim text.