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    SOUNDPROOF SYSTEM
    51.
    发明申请
    SOUNDPROOF SYSTEM 有权

    公开(公告)号：US20210233507A1

    公开(公告)日：2021-07-29

    申请号：US17232816

    申请日：2021-04-16

    Applicant: FUJIFILM Corporation

    Inventor： Yoshihiro SUGAWARA ,  Shogo YAMAZOE ,  Shinya HAKUTA ,  Akihiko OHTSU

    IPC: G10K11/172 ,  G10K11/162

    Abstract: Provided is a soundproof system having high sound silencing performance at a specific frequency while ensuring ventilation property. A soundproof system that silences a sound generated from a sound source which is disposed in a ventilation member having a ventilation passage, in which the sound generated from the sound source is at least one dominant sound of which a sound pressure at a specific frequency is a maximum value, at least a part of a high impedance space in which an acoustic impedance is higher than an average value of an acoustic impedance of the ventilation passage exists within a distance of ±0.25×λ of the sound source in a flow direction of the ventilation passage, the soundproof system includes a silencer that is disposed in the ventilation member and silences a sound in a frequency band including a frequency of the dominant sound, the silencer forms a low impedance space in which the acoustic impedance is lower than the average value of the acoustic impedance of the ventilation passage, and assuming that a center wavelength of the dominant sound is λ and m is a positive integer, a distance L between the high impedance space and the low impedance space satisfies (0.5×λ×m−0.2×λ)

    ACOUSTIC SYSTEM
    52.
    发明申请
    ACOUSTIC SYSTEM 有权

    公开(公告)号：US20210233505A1

    公开(公告)日：2021-07-29

    申请号：US17232835

    申请日：2021-04-16

    Applicant: FUJIFILM Corporation

    Inventor： Shinya HAKUTA ,  Yoshihiro SUGAWARA ,  Akihiko OHTSU ,  Shogo YAMAZOE

    IPC: G10K11/16 ,  G10K11/172 ,  F24F13/24

    Abstract: An acoustic system includes a duct that has a function of causing a fluid to flow therein and has a tubular shape, an internal sound source that is disposed inside the duct on an upstream side or at an outer peripheral portion of the duct, which communicates with an inside of the duct on the upstream side, or an external sound source that is on an outside from an end portion of the duct, and a membrane-shaped member that is formed as a part of a wall of the duct and vibrates in response to sound. A structure including the membrane-shaped member and a rear surface closed space thereof causes acoustic resonance to occur, transmits the acoustic resonance from the sound source into the duct, and suppresses sound radiated from the other end portion of the duct on a downstream side. The external sound source is at a distance within a wavelength at a frequency of the acoustic resonance on the outside from the end portion of the duct. In the acoustic system, as a small membrane-type resonance structure is disposed in a flow passage horizontal direction, wind does not directly hit a membrane surface perpendicularly, and since the acoustic system does not have a through hole or a hole, wind noise can be eliminated.

    SOUNDPROOF STRUCTURE AND SOUNDPROOF STRUCTURE BODY
    53.
    发明申请
    SOUNDPROOF STRUCTURE AND SOUNDPROOF STRUCTURE BODY 审中-公开

    公开(公告)号：US20200175954A1

    公开(公告)日：2020-06-04

    申请号：US16787361

    申请日：2020-02-11

    Applicant: FUJIFILM Corporation

    Inventor： Akihiko OHTSU ,  Shinya HAKUTA ,  Shogo YAMAZOE ,  Yoshihiro SUGAWARA

    IPC: G10K11/168 ,  E04B1/84 ,  B32B3/12 ,  G10K11/172

    Abstract: Provided is a soundproof structure including a film-shaped member which has a plurality of through-holes penetrating in a thickness direction, in which in a hole radius distribution histogram function σ(r), in a case where the hole radius at which an opening ratio σ is maximum is denoted by r0, a total opening ratio of all the through-holes is denoted by σsum, and a thickness of the film-shaped member is denoted by t, an acoustic impedance Z0 of the film-shaped member represented by the following Expression (1) satisfies the following Expression (2) and the hole radius distribution histogram satisfies the following Expression (3). Z 0 = i  ωρ   t σ sum  ( 1 - 2  J 1  ( k ′  - i ) k ′  - i  J 0  ( k ′  - i ) ) - 1 + 2  ωρη 2  σ sum + i  1.7  ωρ   r 0 σ sum ( 1 ) Re  ( Z 0 ) ∫ r 0 ∞  σ  ( r )  dr ( 3 ) The soundproof structure can absorb sound with a high absorbance at a broad band.

    SOUNDPROOFING STRUCTURE
    54.
    发明申请
    SOUNDPROOFING STRUCTURE 审中-公开

    公开(公告)号：US20190295522A1

    公开(公告)日：2019-09-26

    申请号：US16423330

    申请日：2019-05-28

    Applicant: FUJIFILM Corporation

    Inventor： Shinya HAKUTA

    IPC: G10K11/172 ,  G10K11/168 ,  E04B1/84

    Abstract: A soundproof structure includes two or more different kinds of resonant type sound absorbing cells, and an opening part. The opening part is disposed in a position in contact with both two resonant type sound absorbing cells of the two or more different kinds of resonant type sound absorbing cells, or the two resonant type sound absorbing cells are adjacent to each other, and the opening part is disposed in a position adjacent to at least one of the two resonant type sound absorbing cells. Resonance frequencies of one kind of first resonant type sound absorbing cells and resonance frequencies of the other kind of second resonant type sound absorbing cells different from the first resonant type sound absorbing cells match each other. As a result, this soundproof structure can achieve an absorbance of more than 50%, preferably, close to 100% even in a compact, light, and thin structure which is much smaller than a wavelength, and can achieve air permeability, heat conductivity, and a high soundproofing effect by providing a passage of air.

    SOUND-PROOFING STRUCTURE AND SOUND-PROOFING SYSTEM
    55.
    发明申请
    SOUND-PROOFING STRUCTURE AND SOUND-PROOFING SYSTEM 审中-公开

    公开(公告)号：US20190186127A1

    公开(公告)日：2019-06-20

    申请号：US16279300

    申请日：2019-02-19

    Applicant: FUJIFILM Corporation

    Inventor： Shinya HAKUTA ,  Shogo YAMAZOE ,  Akihiko OHTSU

    IPC: E04B1/84 ,  G10K11/172

    Abstract: There is provided a soundproof structure having two or more soundproof units. Each soundproof unit has a frame having an opening portion and a sound absorbing member attached to the opening portion of the frame. Two adjacent soundproof units are disposed such that at least parts of the sound absorbing members face each other. The sound absorbing members at least parts of which face each other are spaced apart from each other. An average distance between the sound absorbing members at least parts of which face each other is less than 20 mm. Therefore, it is possible to provide a soundproof structure and a soundproof system that can soundproof low frequency side sound with a simple configuration, is small and lightweight, and can easily change its frequency characteristics.

    SOUNDPROOFING STRUCTURE, PARTITION STRUCTURE, WINDOW MEMBER, AND CAGE
    56.
    发明申请
    SOUNDPROOFING STRUCTURE, PARTITION STRUCTURE, WINDOW MEMBER, AND CAGE 审中-公开

    公开(公告)号：US20190019490A1

    公开(公告)日：2019-01-17

    申请号：US16119243

    申请日：2018-08-31

    Applicant: FUJIFILM Corporation

    Inventor： Shinya HAKUTA ,  Shogo YAMAZOE ,  Hiroshi KOMATSU

    IPC: G10K11/172

    Abstract: Provided is a soundproofing structure including: a plate-like member which has a plurality of through-holes passing therethrough in a thickness direction, in which in a case where an average opening diameter of the through-holes is 0.1 μm or greater and less than 100 μm, and in a case where the average opening diameter of the through-holes is set as phi (μm) and a thickness of the plate-like member is set as t (μm), an average opening ratio rho of the through-holes is greater than 0 and less than 1 and falls in a range where a center is rho_center=(2+0.25×t)×phi−1.6, a lower limit is rho_center−(0.052×(phi/30)−2), and an upper limit is rho_center+(0.795×(phi/30)−2).

    SOUNDPROOF STRUCTURE
    58.
    发明申请
    SOUNDPROOF STRUCTURE 审中-公开

    公开(公告)号：US20180122352A1

    公开(公告)日：2018-05-03

    申请号：US15854087

    申请日：2017-12-26

    Applicant: FUJIFILM Corporation

    Inventor： Shinya HAKUTA ,  Shogo YAMAZOE

    IPC: G10K11/16 ,  E04B1/84 ,  E04B1/99

    CPC classification number: G10K11/16 ,  E04B1/84 ,  E04B1/994 ,  E04B2001/8461 ,  E04B2001/8485 ,  G10K11/172

    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.

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