公开(公告)号：US11257473B2

公开(公告)日：2022-02-22

申请号：US16283042

申请日：2019-02-22

申请人： FUJIFILM Corporation

发明人： Shogo Yamazoe ,  Shinya Hakuta ,  Akihiko Ohtsu

IPC分类号： G10K11/162 ,  G10K11/16

摘要： There are provided a soundproof structure and an opening structure capable of suppressing degradation of sound absorbing characteristics due to resonance vibration. A micro perforated plate having a plurality of through-holes passing therethrough in the thickness direction and a first frame body, which is disposed in contact with one surface of the micro perforated plate and has a plurality of hole portions, are provided. The opening diameter of the hole portion of the first frame body is larger than the opening diameter of the through-hole of the micro perforated plate. The opening ratio of the hole portion of the first frame body is larger than the opening ratio of the through-hole of the micro perforated plate. The resonance frequency of the micro perforated plate in contact with the first frame body is higher than the audible range.

公开(公告)号：US11332926B2

公开(公告)日：2022-05-17

申请号：US16284424

申请日：2019-02-25

申请人： FUJIFILM Corporation

发明人： Akihiko Ohtsu ,  Shinya Hakuta ,  Shogo Yamazoe

IPC分类号： E04B1/84 ,  G10K11/172 ,  E01F8/00 ,  G10K11/175 ,  G10K11/162 ,  E04B1/82

摘要： There is provided a soundproof structure capable of obtaining a sufficient soundproofing effect by suppressing the leaking of sound due to a diffraction phenomenon in a partition member used for soundproofing. A soundproof unit, which has a frame body having an opening portion and a film that is disposed so as to cover the opening portion and vibrates according to a sound incident on the film, and a partition member, to which one or more soundproof units are attached, are provided.

公开(公告)号：US10902835B2

公开(公告)日：2021-01-26

申请号：US16541403

申请日：2019-08-15

申请人： FUJIFILM Corporation

发明人： Akihiko Ohtsu ,  Shogo Yamazoe ,  Shinya Hakuta ,  Yoshihiro Sugawara

IPC分类号： G10K11/172 ,  G10K11/04 ,  E04B1/82 ,  E04B1/84 ,  G10K11/168 ,  G10K11/16 ,  G10K11/02

摘要： There is provided a soundproof structure that is small and has high soundproofing performance with respect to sound in a low frequency band.
At least one soundproof cell including a frame having a hole portion and a film fixed to the frame is provided. The film has a surface density distribution. Assuming that a shortest line segment length between high surface density regions and between the high surface density regions and end portions of the hole portions is Δd, a longest line segment length between the end portions of the hole portions is L [m], a Young's modulus of a material of the low surface density region is E [Gpa], an average film thickness of the low surface density region is h [m], and a maximum surface density and a minimum surface density of the film are ρmax and ρmin, a parameter X in the following Equation (1) satisfies the following Inequality (2). X=Eh2/(ρmax/ρmin)[N]  (1) (Δd/L−0.025)/(0.06)[N]≤X[N]≤10 [N]  (2)

公开(公告)号：US11636839B2

公开(公告)日：2023-04-25

申请号：US17039072

申请日：2020-09-30

申请人： FUJIFILM Corporation

发明人： Akihiko Ohtsu ,  Yoshihiro Sugawara ,  Shinya Hakuta ,  Shogo Yamazoe

IPC分类号： G10K11/172 ,  F24F13/24 ,  F24F13/02

摘要： Provided is a soundproof structure body including an opening member that forms an opening tube line having a cross-sectional area S, and at least two resonance structures for sound waves that are installed inside the opening tube line, and in a case where a cross-sectional area of the resonance structure is defined as Si, a width thereof is defined as di, an interval between the two resonance structures is defined as L, an impedance of the two resonance structures is defined as Zi, and a synthetic acoustic impedance is defined as Zc, a condition of Expression (1) is satisfied at a resonance frequency f0 at which a theoretical absorption value At is a maximum value. This soundproof structure body can realize high absorption using a plurality of resonance structures. At(f0, L, S, Si, di, Zi)>0.75  (1), Here, L>0, S>0, Si (i=1, 2)>0, di (i=1, 2)>0

公开(公告)号：US11580948B2

公开(公告)日：2023-02-14

申请号：US16718760

申请日：2019-12-18

申请人： FUJIFILM Corporation

发明人： Akihiko Ohtsu ,  Shinya Hakuta ,  Shogo Yamazoe

IPC分类号： G10K11/172 ,  F01N1/02 ,  G10K11/162 ,  F24F13/24

摘要： A soundproof system includes a tube structure having one or more opening ends and a soundproof structure having an opening portion or a radiation surface. The following Expression (1) is satisfied in a case in which a phase difference between sound incident on the soundproof structure and sound re-radiated from the soundproof structure is defined a phase difference as θ1; for one or more maximum values of the pressure of sound formed in the tube structure, a distance between the opening portion or the radiation surface and a position where the sound pressure has a maximum value in the tube structure is L; a wavelength of the incident sound is λ; and a phase difference θ2 is defined as 2π×2L/λ: |θ1−θ2|≤π/2  (1). The soundproof system with a small size can obtain high transmission loss in a wide band.

公开(公告)号：US10861432B2

公开(公告)日：2020-12-08

申请号：US16534429

申请日：2019-08-07

申请人： FUJIFILM Corporation

发明人： Shinya Hakuta ,  Shogo Yamazoe ,  Akihiko Ohtsu

IPC分类号： G10K11/172 ,  G10K11/02 ,  G10K11/04 ,  E04B1/84 ,  G10K11/162 ,  G10K11/16 ,  G10K11/00

摘要： Provided are a soundproof structure and an opening structure which is easy to be manufactured, has a light weight, and is capable of absorbing sound in a wide frequency bandwidth. The soundproof structure includes a tubular member and a film member arranged so as to block a hollow portion of the tubular member. Assuming that a wavelength corresponding to a resonance frequency in a single film vibration element of the film member is λa, lengths from a position at which the film member is attached to two opened end surfaces of the tubular member are L1 and L2, an opened end correction length is δ, and n is an integer of 0 or more, at least one of (λa/4−λa/8)+n×λa/2−δ≤L1≤(λa/4+λa/8)+n×λa/2−δ or (λa/4−λa/8)+n×λa/2−δ≤L2≤(λa/4+λa/8)+n×λa/2−δ is satisfied.

公开(公告)号：US10099317B2

公开(公告)日：2018-10-16

申请号：US15679650

申请日：2017-08-17

申请人： FUJIFILM Corporation

发明人： Shinya Hakuta ,  Shogo Yamazoe ,  Tatsuya Yoshihiro ,  Akihiko Ohtsu ,  Tadashi Kasamatsu ,  Masayuki Naya

IPC分类号： E04B1/86 ,  B23K26/382 ,  G10K11/16 ,  B23K26/00 ,  G10K11/162

摘要： A soundproof structure has one or more soundproof cells. Each of the one or more soundproof cells includes 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. Neither end portions of the through-hole of the frame are closed. The soundproof structure has a 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, and selectively insulates sound in a predetermined frequency band including the shielding peak frequency at its center. Accordingly, there is provided a soundproof structure that is light and thin, does not depend on the position and shape of a hole, has high robustness as a sound insulation material, is stable, has air permeability, has no heat, and is excellent in manufacturability, and a soundproof structure manufacturing method.

公开(公告)号：US11536411B2

公开(公告)日：2022-12-27

申请号：US16829999

申请日：2020-03-25

申请人： FUJIFILM Corporation

发明人： Shinya Hakuta ,  Shogo Yamazoe ,  Akihiko Ohtsu ,  Yoshihiro Sugawara

IPC分类号： F16L55/033 ,  G10K11/162 ,  G10K11/172

摘要： Provided is a silencing tubular structure body that has high strength and can be disposed in a narrow space. A tubular member including a tubular portion having a tubular shape, and a frame portion having at least a part formed integrally with an inner peripheral surface side of the tubular portion; and a lid member that is exchangeably disposed on an opening surface of the frame portion of the tubular member are included, in which the frame portion and the lid member form a resonant silencing structure.

公开(公告)号：US11493232B2

公开(公告)日：2022-11-08

申请号：US16718819

申请日：2019-12-18

申请人： FUJIFILM Corporation

发明人： Yoshihiro Sugawara ,  Shogo Yamazoe ,  Shinya Hakuta ,  Akihiko Ohtsu

IPC分类号： F24F13/24 ,  G10K11/162 ,  G10K11/172

摘要： An object is to provide a silencing system that can achieve both high ventilation performance and high soundproof performance, can silence a plurality of pieces of resonant sound, and has high general-purpose properties since the silencing system does not need to be designed according to a tubular member. In a silencing system where silencers are disposed on a tubular member, the silencers silence sound having a frequency of first resonance of the tubular member, each silencer includes a cavity portion and an opening portion, the opening portions are connected to a sound field space of the first resonance of the tubular member, a conversion mechanism for converting sound energy into thermal energy is disposed in each cavity portion or at a position where the conversion mechanism covers the opening portion, a ratio S1/Sd of the area S1 to the area Sd satisfies “0

公开(公告)号：US10248026B2

公开(公告)日：2019-04-02

申请号：US14863693

申请日：2015-09-24

申请人： FUJIFILM Corporation

发明人： Akihiko Ohtsu

IPC分类号： G03F7/40 ,  H01J37/32 ,  B29C33/38 ,  G03F7/00

摘要： A substrate having a protective film formed on a front surface and a recess in a back surface opposite the front surface is prepared. A resist pattern is formed on the protective film. The protective film is etched using plasma while applying a bias voltage, using the resist pattern as a mask. The bias voltage is increased according to the manner of decrease in the dielectric constant of a region of the substrate corresponding to a covered region of the front surface at which the protective film is present.