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. 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 soundproof cells of the single layer soundproof structures are laminated with a distance therebetween, and at least some of the laminated soundproof cells have the same conditions of the frame, the film, and the opening portion.

Abstract: 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 ?d, 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 ?max and ?min, a parameter X in the following Equation (1) satisfies the following Inequality (2). X=Eh2/(?max/?min)[N]??(1) (?d/L?0.025)/(0.

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.

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.

Abstract: Provided are a heat ray-shielding material having a frame body including a plurality of frames having a cell structure and a plurality of films attached to some or all of the plurality of frames in the frame body, in which at least some of the plurality of films shield near-infrared light, and cell sizes in the plurality of frames are larger than visible light optical wavelengths, whereby the heat ray-shielding material is lightweight, capable of selectively shielding heat rays, that is, near-infrared rays, can be applied to a variety of uses, and can be independently used as movable members, easily removable members, and members having a collapsible structure, an architectural member, a cage member, and a side surface wall.

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 ?a, 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 ?, and n is an integer of 0 or more, at least one of (?a/4??a/8)+n×?a/2???L1?(?a/4+?a/8)+n×?a/2?? or (?a/4??a/8)+n×?a/2???L2?(?a/4+?a/8)+n×?a/2?? is satisfied.

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.

Abstract: Provided is a soundproof structure with a small size and high soundproofing performance of a low frequency band. The soundproof structure includes at least one soundproof cell which includes a frame having a hole portion, an elastic layer laminated on a frame of one opening surface of the frame, and a film laminated on the elastic layer so as to cover the hole portion. An effective displacement amount at a position at which an amplitude is maximized in a region bonded to the elastic layer in a case where a film vibration of the film occurs is 0.4% to 10% of an effective displacement amount at a position at which an amplitude of the film is maximized.

Abstract: Provided is a soundproof structure that is small and light and can reduce noise with a high natural frequency of a sound source at a plurality of frequencies at the same time. The soundproof structure according to the embodiment of the present invention includes a plurality of membrane-like members that are overlapped to be spaced from each other, a support that is made of a rigid body and supports each of the plurality of membrane-like members so as to perform membrane vibration, an inter-membrane space that is sandwiched between two adjacent membrane-like members among the plurality of membrane-like members, and a rear surface space that is formed between one membrane-like member at one end of the support in the support among the plurality of membrane-like members and the one end of the support, in which each of the plurality of membrane-like members absorbs a sound by performing the membrane vibration in a state where the one end of the support is closed.

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.

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.

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.

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.

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.

Abstract: Provided is a box-shaped soundproof structure that is small and light and can sufficiently reduce noise with a natural frequency of a sound source. A box at least a part of which is opened; and a sound reduction structure including a resonator disposed in the box are included, and a sound generated from a sound source disposed in contact with an outer surface of a wall of the box or in the box and emitted from an open surface of the box to the outside is reduced by the sound reduction structure.

Abstract: 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.

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 ?m or more and less than 100 ?m, 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 ?1 and a maximum hole diameter is ?2, 1<?2/?1?5 is satisfied.

Abstract: A soundproof structure has a plurality of soundproof cells arranged in a two-dimensional manner. Each of the plurality of soundproof cells includes a frame formed of a frame member forming an opening and a film fixed to the frame. Two or more types of soundproof cells having different first resonance frequencies are present in the plurality of soundproof cells. A shielding peak frequency at which transmission loss is maximized is present within a range equal to or higher than a lowest frequency among first resonance frequencies of the soundproof cells and equal to or lower than a highest frequency among the first resonance frequencies of the soundproof cells.

Abstract: A first ventilation duct line has a first portion having a first sectional area, a second portion having a second sectional area larger than the first sectional area, and a third portion having an inclined inner face connecting the first portion and the second portion to each other. Further, there is a second ventilation duct line having an opening portion positioned on an inner side of the first portion of the first ventilation duct line.

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 ?m or more and 250 ?m 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.