公开(公告)号：US20220389939A1

公开(公告)日：2022-12-08

申请号：US17887119

申请日：2022-08-12

Applicant: FUJIFILM Corporation

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

IPC: F04D29/66 ,  F04D29/54 ,  F04D19/00 ,  B64C39/02

Abstract: A fan, and a silencer that silences a sound generated by the fan are provided, in which the silencer has a resonance characteristic, the silencer is disposed at a position connected to a sound field space of the sound generated by the fan, and a sum of an absorbance and a reflectivity of the silencer at a resonance frequency is 10% to 43% and a standardized half-width of the silencer is more than 0.05 and 0.25 or less.

公开(公告)号：US20220357075A1

公开(公告)日：2022-11-10

申请号：US17870267

申请日：2022-07-21

Applicant: FUJIFILM Corporation

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

IPC: F24F13/24

Abstract: A silencing device and an air supply system according to an embodiment of the present invention include a resonance silencer provided at a position connected to a space in which the sound source is located within the air supply system in order to silence the noise generated from the sound source in the housing, in which in a case where a resonance wavelength of the resonance silencer alone is denoted by λ, a distance by which the resonance silencer is separated from the sound source is less than λ/2. A fundamental resonance frequency of the resonance silencer is equal to or less than an acoustic upper limit frequency determined according to a size of the housing.

公开(公告)号：US20210012762A1

公开(公告)日：2021-01-14

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

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：US20200342844A1

公开(公告)日：2020-10-29

申请号：US16925653

申请日：2020-07-10

Applicant: FUJIFILM Corporation

Inventor： Shinya HAKUTA ,  Shogo YAMAZOE

IPC: G10K11/172

Abstract: Provided is a soundproof structure that is small and light and can reduce a noise with a high specific frequency of a sound source at a plurality of frequencies at the same time. A soundproof structure includes a plate-like member in which at least one through-hole is formed, a membrane-like member that is disposed to face one surface of the plate-like member, and a support that is formed of a rigid body and supports the plate-like member and the membrane-like member, in which the membrane-like member is supported by the support so as to perform membrane vibration, in which a first space is provided between the plate-like member and the membrane-like member, in which a rear surface space is provided on a side opposite to the first space with the membrane-like member sandwiched therebetween, in which the membrane-like member, the support, and the rear surface space form a first sound absorbing portion that absorbs a sound by membrane vibration, in which the plate-like member having the through-hole, the support, the membrane-like member, and the first space form a second sound absorbing portion that absorbs a sound by Helmholtz resonance, and in which assuming that a fundamental frequency of the Helmholtz resonance in a case where the membrane-like member is regarded as the rigid body in the second sound absorbing portion is fh1 and a fundamental frequency of the membrane vibration of the second sound absorbing portion is denoted by fm1, fh1≥2×fm1 is satisfied.

公开(公告)号：US20200243058A1

公开(公告)日：2020-07-30

申请号：US16851655

申请日：2020-04-17

Applicant: FUJIFILM Corporation

Inventor： Shinya HAKUTA ,  Takafumi HOSOKAWA ,  Shogo YAMAZOE

IPC: G10K11/162 ,  G10K11/172

Abstract: Provided is a soundproof structure that is small and light and can sufficiently reduce noise with a high natural frequency of a sound source. There is provided a soundproof structure including a frame having an opening, and at least one membrane-like member fixed to an opening surface where the opening of the frame is formed, in which a rear surface space is formed to be surrounded by the frame and the membrane-like member, and a sound is absorbed due to vibration of the membrane-like member, and a sound absorption coefficient of the vibration of the membrane-like member at a frequency in at least one high-order vibration mode existing at frequencies of 1 kHz or higher is higher than a sound absorption coefficient at a frequency in a fundamental vibration mode.

公开(公告)号：US20200219475A1

公开(公告)日：2020-07-09

申请号：US16825950

申请日：2020-03-20

Applicant: FUJIFILM Corporation

Inventor： Shinya HAKUTA ,  Shogo YAMAZOE ,  Akihiko OHTSU

IPC: G10K11/162 ,  G10K11/172

Abstract: Provided is a soundproof structure that can obtain high soundproofing performance and suitably maintain characteristics of a forming material. A soundproof structure includes: a microperforated sheet having a plurality of through-holes penetrating in a thickness direction, in which an average opening diameter of the through-holes in a main surface of the microperforated sheet is 0.1 μm or more and less than 100 μm, at least some of the plurality of through-holes are a through-hole A that has a shape having an internal maximum hole diameter, and in the through-hole A, assuming that a minimum hole diameter is ϕ1 and a maximum hole diameter is ϕ2, 1

公开(公告)号：US20200184942A1

公开(公告)日：2020-06-11

申请号：US16787262

申请日：2020-02-11

Applicant: FUJIFILM Corporation

Inventor： Shinya HAKUTA ,  Shogo YAMAZOE

IPC: G10K11/168 ,  G10K11/172 ,  E04B1/86

Abstract: An object is to provide a soundproof structure body and a sound absorbing panel that can obtain a high soundproofing performance in a wide frequency band, achieve miniaturization, and be used in various environments. A soundproof structure body includes three or more sheet members each having a plurality of through-holes that penetrate the sheet member in a thickness direction, in which an average opening diameter of the through-holes is 1 μm or more and 250 μm or less, the three or more sheet members are laminated in the thickness direction to be spaced apart from each other, and an inter-sheet distance of the sheet members adjacent to each other is 0.1 mm or more and 10 mm or less.

公开(公告)号：US20200024845A1

公开(公告)日：2020-01-23

申请号：US16583546

申请日：2019-09-26

Applicant: FUJIFILM Corporation

Inventor： Shinya HAKUTA ,  Shogo YAMAZOE ,  Yuichi KASUYA

IPC: E04B1/86 ,  G10K11/172 ,  B32B7/02 ,  G10K11/162 ,  B32B15/04

Abstract: There are provided a soundproof structure, which can have high soundproofing performance in a wide frequency band and in which visual recognition of through-hole can be suppressed, and a sound absorbing panel and a sound adjusting panel using the soundproof structure. A sheet member having a plurality of through-holes passing therethrough in a thickness direction and a sound absorbing body disposed in contact with one main surface of the sheet member are provided. An average opening diameter of the through-holes is 0.1 μm or more and less than 100 μm. Assuming that the average opening diameter of the through-holes is ϕ (μm) and an average opening ratio is σ a parameter A expressed by A=σ×ϕ+2 is 92 or less.

公开(公告)号：US20190228756A1

公开(公告)日：2019-07-25

申请号：US16283042

申请日：2019-02-22

Applicant: FUJIFILM Corporation

Inventor： Shogo YAMAZOE ,  Shinya HAKUTA ,  Akihiko OHTSU

IPC: G10K11/162

Abstract: 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：US20190005938A1

公开(公告)日：2019-01-03

申请号：US16124821

申请日：2018-09-07

Applicant: FUJIFILM Corporation

Inventor： Masayuki NAYA ,  Shinya HAKUTA ,  Shogo YAMAZOE

IPC: G10K11/162 ,  E04B1/84 ,  B32B5/26 ,  B32B37/12

CPC classification number: G10K11/162 ,  B32B5/26 ,  B32B37/1292 ,  B32B2307/102 ,  B60R13/08 ,  E04B1/8409 ,  E04B1/86 ,  E04B1/994 ,  E04B2001/8433 ,  E04B2001/8447 ,  G10K11/172

Abstract: There is provided a soundproof structure that can selectively block sound having a specific frequency emitted from equipment, automobiles, and general households and can change the cutoff frequency of the sound in accordance with a change in the frequency of sound to be blocked. The above problem is solved by providing a laminated film, in which two or more films each including one or more holes drilled therein are laminated, and two rigid frames, which fix the laminated film so as to be interposed from both sides of the laminated film, and making at least parts of the one or more holes in the respective films of the laminated film overlap each other.