公开(公告)号：US11682374B2

公开(公告)日：2023-06-20

申请号：US16838497

申请日：2020-04-02

Applicant: FUJIFILM Corporation

Inventor： Akihiko Ohtsu ,  Shinya Hakuta ,  Shogo Yamazoe ,  Yoshihiro Sugawara

IPC: G10K11/172 ,  F24F13/24 ,  G10K11/168

CPC classification number: G10K11/172 ,  F24F13/24 ,  G10K11/168 ,  F24F2013/245

Abstract: A soundproof structure body includes a first tube structure and a second tube structure connected to the first tube structure and having a cross-sectional area different from the first tube structure, in which a structure body having a cross-sectional area smaller than a cross-sectional area of the first tube structure is installed in the first tube structure, and a transmission loss in a case where the structure body is installed in the first tube structure with respect to a case where the structure body is not installed in the first tube structure is positive at two frequencies adjacent to each other and difficult to generate an air column resonance mode in the first tube structure. This soundproof structure body generates a soundproof effect even at frequencies other than air column resonance of a tube structure such as a duct or a muffler, has a small size, and can obtain a high transmission loss in a wide-band.

公开(公告)号：US11636839B2

公开(公告)日：2023-04-25

申请号：US17039072

申请日：2020-09-30

Applicant: FUJIFILM Corporation

Inventor： Akihiko Ohtsu ,  Yoshihiro Sugawara ,  Shinya Hakuta ,  Shogo Yamazoe

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

Abstract: 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

Applicant: FUJIFILM Corporation

Inventor： Akihiko Ohtsu ,  Shinya Hakuta ,  Shogo Yamazoe

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

Abstract: 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：US10971129B2

公开(公告)日：2021-04-06

申请号：US15848680

申请日：2017-12-20

Applicant: FUJIFILM Corporation

Inventor： Shogo Yamazoe ,  Shinya Hakuta ,  Masayuki Naya ,  Tadashi Kasamatsu

IPC: G10K11/175 ,  E04B1/84 ,  G10K11/172 ,  E04B1/99

Abstract: A soundproof structure has at least one soundproof cell including a frame having a hole portion and a film fixed to the frame so as to cover the hole portion. The soundproof cell is disposed in an opening member having an opening in a state in which a film surface of the film is inclined with respect to an opening cross section of the opening member and a region serving as a ventilation hole, through which gas passes, is provided in the opening member.

公开(公告)号：US10923094B2

公开(公告)日：2021-02-16

申请号：US15854087

申请日：2017-12-26

Applicant: FUJIFILM Corporation

Inventor： Shinya Hakuta ,  Shogo Yamazoe

IPC: G10K11/16 ,  G10K11/172 ,  E04B1/84 ,  E04B1/99

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.

公开(公告)号：US10861432B2

公开(公告)日：2020-12-08

申请号：US16534429

申请日：2019-08-07

Applicant: FUJIFILM Corporation

Inventor： Shinya Hakuta ,  Shogo Yamazoe ,  Akihiko Ohtsu

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

Abstract: 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：US10854183B2

公开(公告)日：2020-12-01

申请号：US15822638

申请日：2017-11-27

Applicant: FUJIFILM Corporation

Inventor： Shogo Yamazoe ,  Shinya Hakuta ,  Tadashi Kasamatsu ,  Masayuki Naya

IPC: G10K11/16

Abstract: There is provided a soundproof structure which is light and thin, which has air permeability so that wind and heat can pass therethrough and accordingly no heat accumulates on the inside, and which is suitable for equipment, automobiles, and household applications. The soundproof structure has one or more soundproof cells. Each soundproof cell includes a frame having a through-hole through which sound passes, a film fixed to the frame, an opening portion configured to include one or more holes drilled in the film, and a weight disposed on the film. The soundproof structure has a first shielding peak frequency, which is determined by the opening portion drilled in the film and at which a transmission loss is maximized, on a lower frequency side than a first natural vibration frequency of the film of each soundproof cell and a second shielding peak frequency, which is determined by the weight and at which a transmission loss is maximized, on a higher frequency side than the first natural vibration frequency of the film, and selectively insulates sound in a predetermined frequency band centered on the first shielding peak frequency and sound in a predetermined frequency band centered on the second shielding peak frequency.

公开(公告)号：US10789929B2

公开(公告)日：2020-09-29

申请号：US16296499

申请日：2019-03-08

Applicant: FUJIFILM Corporation

Inventor： Shinya Hakuta ,  Shogo Yamazoe

IPC: G10K11/162 ,  F24F13/24 ,  F24F13/02 ,  G10K11/172 ,  G10K11/16 ,  E04B1/84

Abstract: A soundproof structure has two or more soundproof units. Each of the soundproof units has an outer shell having a cylindrical shape, has a hollow inner space inside the outer shell, and has a first opening portion opened to outside on a surface that is one end portion of the outer shell in an axis direction of the cylindrical shape. The two soundproof units adjacent to each other are disposed in the axis direction such that the first opening portions face each other. The first opening portions facing each other are spaced apart from each other in the axis direction. An average distance in the axis direction between the first opening portions facing each other is less than 20 mm. Accordingly, there are provided a soundproof structure and a soundproof system which can insulate sounds on the low frequency side with a simple configuration, are small and lightweight, and can easily change the frequency characteristics.

公开(公告)号：US20190186126A1

公开(公告)日：2019-06-20

申请号：US16284424

申请日：2019-02-25

Applicant: FUJIFILM Corporation

Inventor： Akihiko OHTSU ,  Shinya Hakuta ,  Shogo Yamazoe

IPC: E04B1/84 ,  G10K11/162

CPC classification number: E04B1/84 ,  E01F8/00 ,  E04B2001/8263 ,  E04B2001/8452 ,  G10K11/16 ,  G10K11/162 ,  G10K11/172

Abstract: 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：US10099317B2

公开(公告)日：2018-10-16

申请号：US15679650

申请日：2017-08-17

Applicant: FUJIFILM Corporation

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

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

Abstract: 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.