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公开(公告)号：US11841163B2
公开(公告)日：2023-12-12
申请号：US17174435
申请日：2021-02-12
申请人： FUJIFILM Corporation
IPC分类号： F24F13/24 , E04B1/82 , G10K11/162 , G10K11/172
CPC分类号： F24F13/24 , E04B1/8209 , 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. The silencing system includes one or more silencers that are disposed in a tubular member provided to penetrate a wall separating two spaces, and satisfies “0 0” in a case where a standardized effective modulus of elasticity in an interior space of the tubular member in which the silencers are disposed is denoted by Bn.
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公开(公告)号：US11835253B2
公开(公告)日：2023-12-05
申请号：US17175445
申请日：2021-02-12
申请人： FUJIFILM Corporation
IPC分类号： F24F13/24 , E04B1/86 , F24F13/02 , G10K11/172
CPC分类号： F24F13/24 , E04B1/86 , F24F13/02 , G10K11/172 , F24F2013/245
摘要： An object is to provide a silencing system that includes a silencer disposed in a ventilation sleeve, can suppress the generation of negative pressure in the interior, and can prevent a door or the like of an interior entrance from being difficult to open. The silencing system includes one or more silencers that are disposed in a ventilation sleeve provided to penetrate a wall separating two spaces, and “αA>10C−(0.1/P)×TL” is satisfied in a case where a gap equivalent area of the ventilation sleeve in which the silencer is installed is denoted by αA and a normalized sound transmission loss in an octave band in which a first resonant frequency of the ventilation sleeve is present is denoted by TL.
C denotes a constant determined by a measurement system in a case where there is no silencer and P denotes a transmission efficiency coefficient.-
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.
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公开(公告)号：US12067963B2
公开(公告)日：2024-08-20
申请号：US17232770
申请日：2021-04-16
申请人： FUJIFILM Corporation
IPC分类号： G10K11/172 , F24F13/24 , G10K11/16 , B60R13/08
CPC分类号： G10K11/172 , F24F13/24 , G10K11/161 , B60R13/08
摘要： In a soundproof structure body including a tubular tube body having an opening portion, and a resonance type soundproof structure, in which a phase difference θ, at an upstream of the resonance type soundproof structure, between a reflected wave in the resonance type soundproof structure and a reflected wave of a transmitted wave transmitted through the resonance type soundproof structure and reflected by the opening portion satisfies Inequation |θ−π|≤π/3 with respect to a resonance frequency of the resonance type soundproof structure. This soundproof structure body can effectively offset a reflected wave from a resonance type soundproof structure body by opening end reflection by appropriately specifying positions of the resonance type soundproof structure and the opening end portion of a duct, a tube line, or the like to improve an absorbance of a single resonance type soundproof structure.
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公开(公告)号：US11795974B2
公开(公告)日：2023-10-24
申请号：US17887119
申请日：2022-08-12
申请人： FUJIFILM Corporation
CPC分类号： F04D29/665 , B64C39/024 , F04D19/002 , F04D29/542 , B64U30/20
摘要： 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.
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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.
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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
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：US12006953B2
公开(公告)日：2024-06-11
申请号：US17886556
申请日：2022-08-12
申请人： FUJIFILM Corporation
CPC分类号： F04D29/665 , F04D19/002 , F04D29/542
摘要： An axial fan that includes a casing having an inner space that penetrates in one direction, and a rotor blade disposed in the inner space of the casing, and a silencer that is disposed at a position connected to the inner space of the axial fan are provided, in which the axial fan has a sound pressure distribution having a position at which a sound pressure is high and a position at which the sound pressure is low in a circumferential direction in the inner space during driving, and the silencer is disposed at the position of the axial fan in the circumferential direction at which the sound pressure is high and is not disposed at the position at which the sound pressure is low.
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公开(公告)号：US11682374B2
公开(公告)日：2023-06-20
申请号：US16838497
申请日：2020-04-02
申请人： FUJIFILM Corporation
IPC分类号： G10K11/172 , F24F13/24 , G10K11/168
CPC分类号： G10K11/172 , F24F13/24 , G10K11/168 , F24F2013/245
摘要： 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.
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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
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
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