JP2009030431A - Sound absorbing panel, acoustic chamber, and method for adjusting indoor acoustic characteristics - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To realize a sound absorbing panel utilizing resonance, by using a simple constitution. <P>SOLUTION: A plurality of cavities for generating tube resonance are formed by superposing a corrugated plate and a flat plate together. In other words, the sound absorbing panel 10 is constituted by superposing the one flat plate 12 and the one corrugated plate 14 together, and used by mounting the side of the corrugated plate 10 on an existing ceiling or an existing wall 28. Openings 22 and 24 communicating with the cavities 20 and 26 are formed on the front side of the sound absorbing panel 10. The plurality of sound absorbing panels 10-1 and 10-2 can also be connected to one another in such a manner as to be disposed in the state of abutting side end surfaces 10a and 10b with an opened end of each cavity against each other. A cavity longer than the cavities of the individual sound absorbing panels 10-1 and 10-2 can also be formed by connecting the sound absorbing panels together. The sound absorbing panel can also be composed of the flat plate 62 and a partition plate 64, the flat plate 92 and a circular tube 86, or the corrugated plate 96 and the circular tube 86. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a sound-absorbing panel using resonance, which is realized with a simple configuration. The present invention also relates to a sound room using the sound absorbing panel and a method for adjusting the room sound characteristics.

There exist some which were described in the following patent documents 1 and 2 as a conventional sound-absorbing panel using pipe resonance. The sound absorbing panel described in Patent Document 1 is configured by arranging a plurality of pipes having different lengths adjacent to each other and integrating them to form a panel body, and each pipe has one end closed and the other end open. The sound absorbing panel described in Patent Document 2 is composed of a plurality of pipes having different lengths arranged adjacent to each other to form a panel body. Each pipe has one end closed and the other end opened, and adjacent pipes are connected to each other. Are arranged so that the open end sides are staggered, and further, a plurality of openings are formed on the front surface of the panel body so as to communicate with the cavities in the pipes to form various resonance tube lengths.
Japanese Patent No. 2785687 Japanese Patent No. 3475917

  The sound absorbing panels described in Patent Documents 1 and 2 have a complicated structure because a panel body is formed by combining and integrating a plurality of pipes having different lengths. The present invention has been made in view of the above points, and intends to provide a sound-absorbing panel with a simplified configuration. Another object of the present invention is to provide a sound room using the sound absorbing panel and a method for adjusting the room sound characteristics.

  A first sound absorbing panel according to the present invention includes a corrugated plate and a flat plate, and the corrugated plate and the flat plate are overlapped with each other, and the acoustic plate is mounted on an existing interior surface with the corrugated plate side facing the existing interior surface. A first portion formed between the flat plate and the corrugated valley portion of the corrugated plate, wherein the flat plate and the corrugated plate are spaced apart from each other. A first opening that communicates with the cavity is formed, and at each crest portion of the corrugated plate where the flat plate and the corrugated plate abut each other, the flat plate and the corrugated plate penetrate through both the plates. A second opening communicating with a second cavity formed between the crest portion of the corrugated sheet and the existing interior surface is formed.

  According to this, since a plurality of cavities that generate resonance are formed by overlapping corrugated plates and flat plates, sound absorption can be achieved with a simpler structure than when a panel body is formed by combining a plurality of pipes having different lengths. Panels can be configured. In particular, according to this sound absorbing panel, the existing interior surface is used as a part of the structure for forming the cavity, so that the cavity can be formed with fewer members.

  In the first sound absorbing panel, for example, the corrugated plate and the flat plate are integrated in advance, and a screw is inserted into the existing interior surface through the corrugated plate by inserting a screw through the corrugated plate and fixed to the existing interior surface. Can be.

  A second sound absorbing panel of the present invention comprises a flat plate and a plurality of partition plates, and the plurality of partition plates are arranged on an existing interior surface with an appropriate space between each other, and the plurality of partition plates are A plurality of cavities that are mounted on the existing interior surface and are partitioned by the partition plate between the existing interior surface and the flat plate are formed by covering the flat plates on the arranged surfaces, and the plurality of the flat plates are formed on the flat plate. Openings communicating with the respective cavities are formed. According to this sound absorbing panel, since the existing interior surface is used as a part of the structure for forming the cavity, the cavity can be formed with fewer members.

  A third sound absorbing panel of the present invention comprises a flat plate and a plurality of cylinders, the plurality of cylinders are arranged on an existing interior surface, and the flat plate is covered on the surface on which the plurality of cylinders are arranged. It is mounted on the interior surface and forms an opening that penetrates the surface where the flat plate and each cylinder are in contact with each other and communicates with the cavity inside the cylinder. In the first to third sound absorbing panels of the present invention, the flat plate can be installed in parallel or non-parallel to the existing interior surface.

  A fourth sound absorbing panel of the present invention comprises a corrugated plate and a plurality of cylinders, the plurality of cylinders are arranged on an existing interior surface, and the surface on which the plurality of cylinders are arranged has undulations, The corrugated plate is mounted on the existing interior surface so that the corrugated plate undulates in accordance with the undulation of the surface on which the plurality of tubes are lined. An opening is formed through the surface where the plate and each cylinder are in contact with each other and communicating with the cavity inside the cylinder. In this case, for example, cylinders having various shapes such as circular (cylindrical), elliptical, oval, and mountain shapes can be used.

  The sound-absorbing panel of the present invention is also formed by forming a plurality of cavities behind a non-planar front surface and forming openings on the front surface respectively communicating with the plurality of cavities. According to this sound absorbing panel, a sound absorbing effect can be obtained, and a diffusion effect can be obtained by a non-planar surface.

  The sound absorbing panel of the present invention can be fixed to the existing interior surface by inserting a screw from the opening on the front surface and screwing it into the existing interior surface. Moreover, the space | interval of the said cavity can be made uniform or non-uniform | heterogenous. Moreover, the said opening part can be comprised by a rectangular hole or a slit-shaped hole of several strips, for example. The plurality of cavities may be entirely straight, or part or all of them may be bent halfway. Further, the opening can be provided at one place or a plurality of places per one cavity. Moreover, an opening part can be provided in the position where each cavity extends in the extending direction of the cavity.

  The sound-absorbing panel of the present invention may be configured such that both end portions are opened or both end portions are closed, or one end portion is opened and the other end portion is closed in common or for each cavity. Thereby, the resonance frequency can be changed. An open cell porous material such as urethane or a flow resistance material such as glass wool can be attached to one open end or both open ends. Thus, the sound absorption rate can be adjusted.

  A plurality of the sound absorbing panels according to the present invention are used, and the plurality of sound absorbing panels are arranged in a state in which the side end surfaces where the end portions of the respective cavities are open are in contact with each other, and the cavities of the plurality of sound absorbing panels are arranged. Thus, a cavity longer than the cavity of each sound absorbing panel can be formed (hereinafter, a structure in which a plurality of sound absorbing panels are connected in this way is referred to as a “sound absorbing structure”).

  According to this, a plurality of sound absorbing panels are arranged in a state in which the side end surfaces where the end portions of the respective cavities are open to each other, and the cavities of the plurality of sound absorbing panels are connected to each other. Since the cavity longer than the cavity is formed, the resonance frequency (sound absorption frequency) can be variously set according to the number of the sound absorption panels arranged. Therefore, the sound absorption characteristic (reverberation time) can be easily set at the construction site, and the degree of freedom in setting the sound absorption characteristic particularly in the low frequency range is improved.

  The sound absorbing structure is configured such that the entire structure in which the plurality of sound absorbing panels are arranged is commonly used in all the connected cavities or is open at both ends, or closed at both ends, or at one end. And the other end can be closed. Thereby, the resonance frequency can be changed. An open cell porous material such as urethane or a flow resistance material such as glass wool can be attached to one open end or both open ends of the connected cavities. Thus, the sound absorption rate can be adjusted.

  The acoustic chamber according to the present invention has the sound absorbing panel mounted on an existing interior surface (wall surface, ceiling surface, floor surface, etc.). In this case, one end of the cavity of the sound absorbing panel can be closed with another existing interior surface orthogonal to the existing interior surface on which the sound absorbing panel is mounted. According to this, it is possible to close one end of the cavity without using a closing member as an individual part.

  The room acoustic characteristic adjusting method of the present invention is to adjust the acoustic characteristics of the room by mounting the sound absorbing panel of the present invention on the existing interior surface of the room.

<< Embodiment of the first sound absorbing panel >>
An embodiment of the first sound absorbing panel of the present invention will be described. FIG. 1 shows the structure of one sound absorbing panel 10. 1A is a front view, and FIG. The sound absorbing panel 10 is configured as a panel body having a predetermined thickness and having a rectangular front shape (square in the illustrated example). The sound absorbing panel 10 is sandwiched between the flat plate 12 and the corrugated plate 14 at both ends of the corrugated direction of the corrugated plate 14 and a single corrugated plate 14 superimposed on the flat plate 12. Two hazel sharks 16 and 18 are provided. Both side end faces 10a and 10b in the direction perpendicular to the corrugation of the corrugated plate 14 of the sound absorbing panel 10 are opened. The sound-absorbing panel 10 is configured so that these members 12, 14, 16, and 18 are brought into contact with each other (each contact surface between the flat plate 12 and the corrugated plate 14, and each contact between the flat plate 12 and the corrugated plate 14 and the blade 16 and 18). Are joined and fixed by a joining member such as an adhesive or a screw. The flat plate 12 is made of, for example, a wooden board such as an OSB plywood (oriented strand board), a plastic board, a paperboard, or the like. The corrugated plate 14 is made of a wood fiber plate, a plastic plate, a paperboard or the like, and is formed in a trapezoidal corrugated cross-sectional shape in the example of FIG. The hazellets 16 and 18 are made of, for example, wood or plastic squares.

  According to the above configuration, the plurality of cavities 20 (the first cavity 20) that causes tube resonance between the flat plate 12 and the corrugated plate 14 at the valley portions 14a of the corrugated plate 14 where the flat plate 12 and the corrugated plate 14 are separated from each other. 1 cavity) is formed. One or two openings 22 (first openings) communicating with each cavity 20 are formed in the flat plate 12 for each cavity 20. The openings 22 are formed at different positions in the extending direction of each cavity 20 so as to form various resonance tube lengths in each cavity 20 (dispersing the resonance tube length, that is, generating various resonance frequencies). Has been. In addition, each crest portion 14b of the corrugated plate 14 where the flat plate 12 and the corrugated plate 14 are in contact with each other, and an opening 24 (second opening portion) penetrating the flat plate 12 and the corrugated plate 14 is a crest of the corrugated plate 14. One or two portions are formed for each portion 14b. Each opening 24 communicates with each space 26 formed on the back side of the crest portion 14 b of the corrugated plate 14. The space 26 constitutes a plurality of cavities (second cavities) that are closed by the existing interior surface such as a ceiling, an existing wall, an existing floor, and the like, and cause pipe resonance when the sound absorbing panel 10 is mounted on the existing interior surface. To do. The openings 24 are formed at different positions in the extending direction of the cavities 26 so as to form various resonant tube lengths in the cavities 26 (dispersing the resonant tube lengths, that is, generating various resonant frequencies). Has been. The total length of each cavity 20, 26 is equal to each other. It should be noted that a non-breathable blocking member made of a plate material or the like is attached to one or both of the side end faces 10a, 10b in a direction perpendicular to the corrugation of the corrugated plate 14 of the sound absorbing panel 10 so that one end or both ends of the cavities 20, 26 The resonance frequency can be changed by closing. Further, the sound absorption coefficient can be adjusted by attaching an open-cell porous material such as urethane or a flow resistance material such as glass wool to the opened side end surfaces (one or both of the side end surfaces 10a and 10b).

  The vertical and horizontal dimensions of the sound absorbing panel 10 are, for example, 900 mm × 900 mm. Further, when the flat plate 12 is made of 8.5 mm thick OSB plywood, and the corrugated plate 14 is made of a wood fiber board having a thickness of 23 mm including wavy undulations, the thickness of the sound absorbing panel 10 is 31.5 mm. Become. The vertical and horizontal dimensions of the opening 22 are, for example, 40 mm × 40 mm (40 mm × 25 mm at the left and right ends in FIG. 1), and the vertical and horizontal dimensions of the opening 24 are, for example, 40 mm × 25 mm.

  FIG. 2 shows a construction procedure for mounting the sound absorbing panel 10 on the existing ceiling or existing wall of the room. (I) is the state before construction. The existing ceiling or existing wall 28 is composed of a board material such as a plaster board or a wooden board, and is used as a base material (a field edge or upper floor floor joist in the case of an existing ceiling, or a column or a stud in the case of an existing wall). It is fixed. The sound absorbing panel 10 is brought into contact with the existing ceiling or existing wall 28 from the indoor side 34 and the corrugated sheet 14 side is brought into contact with the existing ceiling or existing wall 28 side, and screws 32 (wood screws, board screws, etc.) are arranged at appropriate intervals. Is inserted through the opening 22 and screwed into the existing ceiling or existing wall 28 through the corrugated plate 14. Thus, the sound absorbing panel 10 is fixed to the existing ceiling or the lower surface of the existing wall 28. The corrugated plate 14 can be more firmly fixed by applying an adhesive in advance to each surface 14c that contacts the existing ceiling or the existing wall 28. (Ii) is the state after construction. In this state, a cavity 26 is formed between the existing ceiling or existing wall 28 and the corrugated sheet 14. The cavity 26 communicates with the indoor side 34 through the opening 24. The cavity 20 formed between the flat plate 12 and the corrugated plate 14 communicates with the indoor side 34 through the opening 22. As a result, the cavities 20 and 26 absorb the sound of the indoor side 34 (sound existing in the room) around each resonance frequency due to tube resonance to shorten the reverberation time. The resonance frequency of each of the cavities 20 and 26 varies depending on the positions where the openings 22 and 24 are formed in the extending direction of the cavities 20 and 26 and whether both ends of the cavities 20 and 26 are opened, closed, or closed. Can be set to In the design of FIG. 1, assuming that the longitudinal and lateral dimensions of the sound absorbing panel 10 are 900 mm × 900 mm, and the both ends of the cavities 20 and 26 are opened, the resonance frequency is 200 Hz to 2.3 kHz and its harmonics, and one end is closed. The resonance frequency is assumed to be 100 Hz to 1.1 kHz.

  FIG. 3 shows an example in which the sound absorbing panel 10 is mounted in an acoustic room 36 (such as a general household or office room). The acoustic chamber 36 is surrounded by a front wall surface 38, a rear wall surface (not shown), left and right wall surfaces 40, 42, a floor surface 44, and a ceiling surface 46. Here, an example is shown in which four sound absorbing panels 10 are attached to the front wall surface 38 (existing wall) and two sound absorbing panels 10 are attached to the ceiling surface 46 (existing ceiling).

  When the sound absorbing panel 10 is used alone, it can be used in various modes as shown in FIG. 1 (a) uses the sound absorbing panel 10 of FIG. 1 as it is, and the open end portions on both sides of the cavities 20 and 26 from the side end surfaces 10a and 10b in the direction perpendicular to the undulation of the corrugated plate 14 of the sound absorbing panel 10 are directly outside air. Exposed to. (B) is a closed member 48 that is not permeable by a plate or the like attached to the left and right side end faces 10a of the sound absorbing panel 10 to close one open end of the cavities 20 and 26, and the other side end face 10b is closed. The other open end of the cavities 20 and 26 is exposed as it is to the outside air without mounting any members. (C) shows that sound-absorbing panel 10 has left and right side end faces 10a, 10b fitted with non-breathable blocking members 48, 50 made of plate material or the like, and both open ends of cavities 20, 26 are closed. (D) is a non-breathable blocking member 48 made of a plate material or the like attached to one of the left and right side end faces 10a of the sound absorbing panel 10 to close one open end of the cavities 20 and 26, and the other side end face 10b to urethane. A flow resistance material 54 such as an open-cell porous material such as glass wool is attached, and the other opening end of the cavities 20 and 26 is communicated with the outside air via the flow resistance material 54. (E) shows that flow resistance materials 52 and 54 such as open-cell porous material such as urethane and glass wool are attached to the left and right side end surfaces 10a and 10b of the sound absorbing panel 10, and the flow passes through both open end portions of the cavities 20 and 26. The air is communicated with the outside air through the resistance members 52 and 54.

  The reverberation chamber method sound absorption characteristics measured by attaching the sound absorbing panel 10 to the wall of the reverberation chamber in each of the modes (a) to (e) of FIG. 4 are shown in FIGS. Urethane was used for the flow resistance members 52 and 54 of (d) and (e). FIG. 5 (f) shows a comparative example in which the sound absorbing panel 10 is not formed with openings 22 and 24 and left and right end faces 10a and 10b are fitted with non-breathable blocking members 48 and 50 made of plate material or the like. This is a characteristic when both of the opening ends are closed (the opening 22 and 24 are not provided in the embodiment shown in FIG. 4C). Comparing the characteristics (c) and (f) of FIG. 5, it can be seen that the sound absorption rate is increased (the reverberation time is shortened) due to the presence of the openings 22 and 24. Further, comparing the characteristics (a) and (b), it can be seen that the sound absorption coefficient in the low frequency range (around 125 Hz) increases by closing one open end of the cavities 20 and 26. Further, comparing the characteristic (c) with the characteristics (a), (b), (d), and (e), it can be seen that the sound absorption coefficient is reduced as a whole when both open ends of the cavities 20 and 26 are closed. . Further, comparing the characteristic (a) with the characteristic (e) (or the characteristic (b) and the characteristic (d)), when the flow resistance members 52 and 54 are used, the sound absorption coefficient increases as a whole (or with respect to the mid-high range). I understand that.

  In the above embodiment, a porous sound absorbing material is attached or sprayed at a position (or a position including the opening) that avoids the opening on the room-side surface of the sound absorbing panel, thereby realizing a broader sound absorbing effect. It can also be made. Moreover, in the said embodiment, the opening part which faces an indoor side can also be covered by covering the room | chamber interior surface of a sound-absorbing panel with sound permeable cloths, such as a film and a saran net. In the embodiment, the openings are formed at different positions for each cavity in the extending direction of the cavity. However, the openings can be formed at a uniform position or a uniform pitch in each cavity. Moreover, in the said embodiment, although the front shape of the sound absorption panel was formed in the rectangle, it is not restricted to this, A parallelogram, a triangle, a hexagon, etc. can also be formed.

<< Embodiment of sound absorbing structure >>
An embodiment of a sound absorbing structure will be described. Here, a case where two sound absorbing panels 10 of FIG. 1 are connected and used will be described. In this case, it can be used in various modes as shown in FIG. The two sound absorbing panels 10-1 and 10-2 are connected to each other by, for example, the side end face 10b of the sound absorbing panel 10-1 in which the ends of the cavities 20 and 26 are open and the ends of the cavities 20 and 26 are open. The sound absorbing panel 10-2 is put in a state where the side end faces 10a are butted together, and a gum tape 56 is wound around the entire circumference along the butting line to join the sound absorbing panels 10-1 and 10-2 together. be able to. It can also connect using joining members other than the gum tape 56. FIG. Or it arrange | positions in the state which faced the side end surface 10b of the sound absorption panel 10-1, and the side end surface 10a of the sound absorption panel 10-2 on the wall surface of the room, and is fixed to a wall surface separately (sound absorption panels 10-1 and 10-2) Can not be joined directly). Thus, by arranging the two sound absorbing panels 10-1 and 10-2 so that the cavities 20 and 26 are connected to each other, a double-length cavity can be obtained.

  Each aspect of FIG. 6 will be described. (A) uses the connected sound-absorbing panels 10-1 and 10-2 as they are, and exposes both ends of the connected cavities 20 and 26 to the outside as they are. (B) attaches a closing member 48 made of a plate or the like to one side end face 10a of the connected sound absorbing panels 10-1 and 10-2, closes one open end of the connected cavities 20 and 26, and The open end is exposed as it is to the outside air. (C) Closes both open end portions of the connected cavities 20 and 26 by attaching closing members 48 and 50 made of plate materials or the like to both side end surfaces 10a and 10b of the connected sound absorbing panels 10-1 and 10-2. It is a thing. (D) attaches the closing member 48 by the board | plate material etc. to the one side end surface 10a of the connected sound-absorbing panel 10-1,10-2, closes one opening edge part of the connected cavity 20,26, and the other A flow resistance material 54 made of open-cell porous material such as urethane or glass wool is attached to the side end face 10b of the other end, and the other open end of the connected cavities 20 and 26 is connected to the outside air via the flow resistance material 54. Communicated with (E) shows the connected cavity 20 in which flow resistance materials 52 and 54 such as open-cell porous material such as urethane and glass wool are mounted on both side end surfaces 10a and 10b of the sound absorbing panels 10-1 and 10-2. , 26 are communicated with the outside air through the flow resistance members 52, 54.

  8 sets of 2 connected sound absorbing panels of each aspect (a) to (c) in FIG. 6 are individually arranged in a 17 tatami room (the area of the sound absorbing panel 10 is 12.96 square meters in total) and the reverberation time is measured respectively. And the frequency characteristic of the additional sound absorption force calculated | required from the difference with this and the reverberation time measured in the living room without arrange | positioning this sound absorption panel is shown to Fig.7 (a)-(c), respectively. As a comparative example, the addition of a single sound absorbing panel 10 (in the form of FIG. 4A) in which both open ends of the cavities 20 and 26 are exposed to the outside air is disposed in the same room for the same area (16 sheets). The frequency characteristics of the sound absorption force are shown in FIG. According to FIG. 7, when two sound absorbing panels 10 are connected (the modes of FIGS. 6A to 6C, the characteristics (A) to C of FIG. 7) are used as a single unit (FIG. 7). Compared with the mode 4 (a) and the characteristic (x) in FIG. 7, the sound absorption in the low sound range (around 125 Hz) is increased. This is because the two resonance panels 10 are connected to extend the lengths of the cavities 20 and 26, so that the lowest resonance frequency is lower than when the acoustic panel 10 is used alone. In particular, it can be seen that in the embodiment shown in FIG. 6 (c) (characteristic (c) in FIG. 7) in which both open ends of the cavities 20 and 26 are closed, the increase in the sound absorption capacity in the low frequency range is remarkable. In addition, it can be seen that the sound absorbing power in the vicinity of 125 Hz and 250 Hz increases in the embodiment of FIG. 6B (characteristic (b) in FIG. 7) in which one opening end is closed and the other opening end is exposed to the outside air.

  FIG. 8 shows an example in which the sound absorbing panel 10 is arranged in the acoustic chamber 36 as a single unit or two units. The acoustic chamber 36 is surrounded by a front wall surface 38, a rear wall surface (not shown), left and right wall surfaces 40, 42, a floor surface 44, and a ceiling surface 46. Four single sound absorbing panels 10 having both open ends of the cavities 20 and 26 opened are mounted on the front wall 38. The four sound absorbing panels 10 are arranged in such a manner that adjacent ones are rotated 90 degrees vertically and horizontally. On the left wall surface 40, two connected sound absorbing panels 10A in which two sound absorbing panels 10-1 and 10-2 are connected are mounted in a vertically arranged manner on the floor surface 44. The upper ends of the connected cavities 20 and 26 are open, and the lower ends are closed by the floor 44. According to this, the same use mode as FIG.6 (b) is obtained, without mounting | wearing a closing member to a lower end part. Two connected sound absorbing panels 10B in which two sound absorbing panels 10-1 and 10-2 are connected to the right wall surface 42 are placed on the floor surface 44 in a horizontal arrangement and the side end surfaces are in contact with the front wall surface 38. It is installed. The front ends of the connected cavities 20 and 26 are closed by a front wall 38, and the rear ends are open. According to this, the use mode similar to that shown in FIG. 6B can be obtained without attaching the closing member to the front end portion. A single or a plurality of sound absorbing panels 10 connected to each other can be mounted on the ceiling 46 or the floor surface 44. In addition, for sound absorbing panels used alone, one end of the cavities 20 and 26 is closed with the existing interior surface (wall surface, ceiling surface, floor surface, etc.) (the other end is opened or closed with a closing member, or a flow resistance material is attached. You can).

  In addition, although the said embodiment demonstrated the case where two sound absorption panels were connected, three or more units | sets can also be connected. Further, in the embodiment of the sound absorbing structure, the end portions on the same side are uniformly opened or closed for all the connected cavities, or the flow resistance material is mounted, but the end portions are individually opened for each connected cavity. It is also possible to set whether to close or install a flow resistance material. Further, in the embodiment of the sound absorbing structure, the sound absorbing panels having the same front shape are connected to each other. However, the sound absorbing panels having different front shapes from each other may be used as long as the side end surfaces are brought into contact with each other and the cavities can be connected to each other. You can also connect them together. Moreover, although the case where tube resonance was utilized was demonstrated in the said embodiment, this invention can also be comprised so that Helmholtz resonance may be utilized.

《Reference example of sound absorbing panel》
A reference example of the sound absorbing panel is shown in FIG. The sound absorbing panel 58 has a flat plate 15 mounted on the back side of the sound absorbing panel 10 of FIG. The same reference numerals are used for parts common to those in FIG. The flat plate 15 can be made of the same plate material as the flat plate 12. The flat plate 15 is not formed with openings corresponding to the openings 22 and 24 of the flat plate 12. The sound-absorbing panel 58 has members 12, 14, 15, 16, and 18 attached to each other's contact surfaces (the contact surfaces between the flat plates 12 and 15 and the corrugated plate 14, the flat plates 12 and 15 and the blades 16 and 18 respectively. Are joined and fixed by a joining member such as an adhesive or a screw. The sound absorbing panel 10 is mounted by bonding the flat plate 15 side to an existing interior surface (wall surface, ceiling surface, floor surface, etc.) with a bonding member such as an adhesive or a screw.

<< Embodiment 1 of the second sound absorbing panel >>
A first embodiment of the second sound absorbing panel of the present invention is shown in FIG. The sound absorbing panel 60 includes a flat plate 62 and a plurality of partition plates 64. Each partition plate 64 is arranged on an existing interior surface (wall surface, ceiling surface, floor surface, etc.) 28 in parallel with each other at equal intervals. One side end portion 64a that abuts the existing interior surface 28 of each partition plate 64 is fixed to the existing interior surface 28 with a joining member such as an adhesive or a screw. A flat plate 62 is placed over the entire surface on which the partition plates 64 are arranged. The lower surface 62a of the flat plate 62 is fixed to the other end 64b of the partition plate 64 with a bonding member such as an adhesive or a screw. Thus, a plurality of cavities 68 partitioned by the partition plate 64 are formed between the existing interior surface 28 and the flat plate 62. The total length of each cavity 68 is equal to each other. The flat plate 62 and the partition plate 64 constituting the sound absorbing panel 60 are each made of a wood board such as an OSB plywood, a plastic board, a paperboard or the like. The flat plate 62 and the partition plate 64 can also be manufactured as an integrally molded product made of plastic or the like. The flat plate 62 has one or more openings 70 communicating with the cavities 68 for each cavity 68. The openings 70 are formed at different positions in the extending direction of the cavities 68 so as to form various resonance tube lengths in the cavities 68.

<< Embodiment 2 of the second sound absorbing panel >>
In the embodiment of FIG. 10, a plurality of partition plates 64 are arranged at equal intervals. However, as in the sound absorbing panel 72 of FIG. 11, the partition plates 64 are arranged at unequal intervals so that the width of the cavity 68 is varied. It can also be formed. In FIG. 11, the same reference numerals are used for portions corresponding to those in FIG. The flat plate 62 has one or more openings 70 communicating with the cavities 68 for each cavity 68. The openings 70 are formed at different positions in the extending direction and the width direction of each cavity 68 so as to form various resonance tube lengths in each cavity 68.

<< Embodiment 3 of the second sound absorbing panel >>
In the embodiment of FIG. 10, each opening 70 is configured by one rectangular hole, but the opening 76 may be configured by a plurality of slit-shaped holes as in the sound absorbing panel 74 of FIG. In FIG. 12, the same reference numerals are used for portions corresponding to those in FIG. According to this, it is possible to prevent an object from entering through the opening 76.

<< Embodiment 4 of the second sound absorbing panel >>
In the embodiment of FIG. 10, the flat plate 62 is arranged parallel to the existing interior surface 28, but the flat plate 62 may be arranged non-parallel to the existing interior surface 28 as in the sound absorbing panel 78 of FIG. 13. it can. In FIG. 13, the same reference numerals are used for portions corresponding to FIG. According to this, when the sound absorbing panel 78 is mounted on the wall surface of the acoustic chamber, the front surface (the flat plate 62) of the sound absorbing panel 78 and the wall surface of the acoustic chamber facing the front surface are not parallel to each other. A scattering effect is obtained for sound.

<< Embodiment 5 of the second sound absorbing panel >>
In the embodiment of FIG. 10, the cavity 68 is formed in a straight line, but a part or all of the cavity 68 may be bent in the middle as in the sound absorbing panel 80 of FIG. 14. According to this, the total length of each cavity 68 can be made different from each other. In FIG. 14, the same reference numerals are used for portions corresponding to those in FIGS. In FIG. 14, the openings 76 are formed by a plurality of slit-like holes as in FIG. 12, but the openings 70 by one rectangular hole can be formed as in FIG. 10 and the like.

<< Embodiment of Third Sound Absorbing Panel >>
The sound absorbing panel 82 in FIG. 15 includes a flat plate 84 and a plurality of tubes 86. The total length of each cylinder 86 is equal to each other. Here, the cylinder 86 is formed of a cylinder. The flat plate 84 is made of a wooden board such as an OSB plywood, or a plastic board, paperboard or the like, and the cylinder 86 is made of a paper cylinder, a plastic cylinder or the like. The plurality of cylinders 86 are arranged in parallel to each other on the existing interior surface 28 without a gap (or may have a gap), and are fixed to the existing interior surface 28 with a bonding member such as an adhesive or a screw. The flat plate 84 covers the entire array of the cylinders 86 and is fixed to the cylinders 86 with a bonding member such as an adhesive or a screw. The flat plate 84 and each cylinder 86 are formed with one or a plurality of openings 92 for each cylinder 86 through the surface where the flat plate 84 and each cylinder 86 are in contact and communicating with the cavity 90 inside the cylinder 86. Yes. The openings 92 are formed at different positions in the extending direction of each cylinder 86 so that each cavity 90 forms various resonance tube lengths. The cylinder 86 may be configured by a cylinder other than the cylinder (a square cylinder, a triangular cylinder that is alternately inverted upside down, or the like). In the sound absorbing panel 82, as shown in FIG. 15, the flat plates 84 are parallel to the existing interior surface 28 if the cylinders 86 have the same outer diameter. On the other hand, the flat plate 84 becomes non-parallel to the existing interior surface 28 by sequentially increasing (or decreasing) the outer diameter between the adjacent cylinders 86.

<< Embodiment of Fourth Sound Absorbing Panel >>
In the embodiment of FIG. 15, the flat plate 84 is put on the array of cylinders 86, but as the sound absorbing panel 94 of FIG. 16, the wave forms along the surface of the array of cylinders 86 on the array of cylinders 86. The corrugated plate 96 can be covered. In FIG. 16, the same reference numerals are used for portions corresponding to FIG. The corrugated board 96 can be made of a wood board such as an OSB plywood, a plastic board, a paperboard or the like. The corrugated plate 96 is fixed to the cylinder 86 with a joining member such as an adhesive or a screw. One or a plurality of openings 92 are formed on the surfaces of the corrugated plate 96 and each cylinder 86 for each cylinder 86 through the surface where the corrugated plate 96 and each cylinder 86 are in contact with each other and communicating with the cavity 90 of the cylinder 86. Has been. According to this, since the surface of the sound absorbing panel 94 (the surface of the corrugated plate 96) is wavy, a scattering effect can be obtained on the surface.

<< Other Embodiment 1 >>
Another embodiment 1 of the sound absorbing panel of the present invention is shown in FIG. In the sound absorbing panel 98, the plate 62 on the front surface of the sound absorbing panel 60 in FIG. 10 is a flat surface, whereas the plate is configured in a mountain-shaped non-planar surface. That is, the plate 100 on the front surface of the sound absorbing panel 98 has a shape in which two flat plates are combined in a mountain shape. The height of the partition plate 64 is sequentially changed according to the change in the distance between the existing interior surface 28 and the angle plate 100. Other configurations are the same as those of the sound absorbing panel 60 of FIG. The same reference numerals are used for portions corresponding to those in FIG. According to the sound absorbing panel 98, a sound absorbing effect is obtained, and a diffusion effect is obtained by the surface of the non-planar angle plate 100.

<< Other Embodiment 2 >>
Another embodiment 2 of the sound absorbing panel of the present invention is shown in FIG. The sound absorbing panel 102 is configured such that the front plate 62 of the sound absorbing panel 60 of FIG. 10 is a flat surface, whereas the plate is a curved non-planar surface. That is, the plate 104 on the front surface of the sound absorbing panel 102 is configured in a shape in which a flat plate is curved in an arch shape in one direction. The height of the partition plate 64 is sequentially changed according to the change in the distance between the existing interior surface 28 and the curved plate 104. Other configurations are the same as those of the sound absorbing panel 60 of FIG. The same reference numerals are used for portions corresponding to those in FIG. According to the sound absorbing panel 102, a sound absorbing effect is obtained, and a diffusion effect is obtained by the surface of the curved plate 104 which is non-planar.

<< Other Embodiment 3 >>
Another embodiment 3 of the sound absorbing panel of the present invention is shown in FIG. In the sound absorbing panel 103, the front plate 84 of the sound absorbing panel 82 in FIG. 15 is flat and the cylinder 86 has the same outer diameter, whereas the front plate 105 is configured to be non-planar and the cylinder 86 is adapted to this. The outer diameter of each is different. In other words, the front plate 105 is configured by combining two flat plates in a valley shape. The outer diameter of the cylinder 86 is sequentially changed in accordance with the change in the distance between the existing interior surface 28 and the valley plate 105. That is, the cylinder 86 located at the central portion in the width direction of the sound absorbing panel 103 has a minimum diameter and gradually increases in diameter as it goes to both outer sides. Other configurations are the same as those of the sound absorbing panel 82 of FIG. The same reference numerals are used for portions corresponding to those in FIG. According to the sound absorbing panel 103, a sound absorbing effect is obtained, and a diffusion effect is obtained by the surface of the valley plate 105 which is non-planar.

  Regarding the sound absorbing panels according to the second to fourth sound absorbing panels and the other first to third embodiments, the following various changes can be made in the same manner as the first sound absorbing panel. That is, a broader sound absorbing effect can be exhibited by attaching or spraying a porous sound absorbing material to a position (or a position including the opening) where the opening on the room-side surface of the sound absorbing panel is avoided. Moreover, the sound-absorbing panel can be covered with an acoustically permeable cloth such as a film or a salannet to cover the opening facing the room. In the above embodiment, the openings are formed at different positions for each cavity in the extending direction of the cavity, but can be formed at a uniform position or a uniform pitch in each cavity. Moreover, in the said embodiment, although the front shape of the sound-absorbing panel was formed in the rectangle, it can form not only in this but in a parallelogram, a triangle, a hexagon.

  As for the second to fourth sound absorbing panels and the other sound absorbing panels according to the first to third embodiments, screws are inserted into the existing interior surface 28 by inserting screws from the front openings 70, 76 and 92 in the same manner as the first sound absorbing panel. It can be screwed and fixed to the existing interior surface 28.

  Although FIG. 12 was shown as embodiment which replaced the opening part 70 by the rectangular hole of FIG. 10 with the slit-shaped hole of several strip | lines, implementation of FIG. 1, FIG. 11, FIG. 13, FIG. Also in the form, the openings 22, 24, 70, and 92 formed by rectangular holes can be replaced with openings formed by a plurality of slit-shaped holes.

  The following various modifications are possible also in the embodiment of the first sound absorbing panel. That is, in the sound absorbing panel 10 of FIG. 1, the pitch of the corrugated plates 14 can be made non-uniform, and the widths of the cavities 20 and 22 can be made non-uniform (random) as in the case of the sound absorbing panel 72 of FIG. Further, in the sound absorbing panel 10 of FIG. 1, the height of the corrugated plate 14 is sequentially changed by sequentially changing the width of the inclined surface (surface connecting the top surface and the bottom surface) of the corrugated plate 14, and the sound absorbing panel 78 of FIG. Similarly, the flat plate 12 can be made non-parallel to the existing interior surface. Further, in the sound absorbing panel 10 of FIG. 1, the corrugated plate 14 is bent halfway, and a part or all of the plurality of cavities 20 and 22 are bent halfway like the sound absorbing panel 80 of FIG. Can do. Further, in the sound absorbing panel 10 of FIG. 1, the height of the corrugated sheet 14 is sequentially changed by sequentially changing the width of the inclined surface of the corrugated sheet 14, so that the sound absorbing panel 98 of FIG. 17, the sound absorbing panel 102 of FIG. A non-planar plate can be disposed on the front surface as in the sound absorbing panel 103 of FIG.

  The sound absorbing panels 60, 72, 74, 78, 80, 82, 94, 98, 102, and 103 shown in FIGS. 10 to 19 can be used by being mounted in an acoustic room, for example, as in FIG. Further, when the sound absorbing panels 60, 72, 74, 78, 80, 82, 94, 98, 102, 103 are used alone, they can be used in various modes as in FIG. That is, the ends of the cavities 68 and 90 can be opened, for example, or a non-breathable blocking member or flow resistance material can be attached to the ends of the cavities 68 and 90. Further, when two sound absorbing panels 60, 72, 74, 78, 80, 82, 94, 98, 102, 103 are connected and used, they can be used in various modes as in FIG. Three or more units can be connected and used. In addition, as in FIG. 8, the acoustic chamber 60, 72, 74, 78, 80, 82, 94, 98, 102, 103 is used alone or two or more units are connected and used. They can also be mixed.

It is the front view which shows embodiment of the 1st sound absorption panel of this invention, and its A arrow directional view. It is a schematic cross section which shows the construction procedure which mounts the sound-absorbing panel of FIG. 1 on the existing ceiling or existing wall of a room. It is a perspective view which shows an example which mounted | wore the acoustic room with the sound absorption panel of FIG. It is a figure which shows the various aspects which use the sound-absorbing panel of FIG. 1 alone. It is a characteristic view of the reverberation chamber method sound absorption coefficient measured about each aspect of FIG. It is a front view which shows embodiment of a sound absorption structure, and is a figure which shows the various aspects which connect and use two sound absorption panels of FIG. FIG. 7 is a frequency characteristic diagram of additional sound absorption force measured for each aspect of FIG. 6. It is a perspective view which shows an example which has arrange | positioned the sound absorption panel of FIG. It is the front view which shows the reference example of a sound absorption panel, and its B arrow view. It is the front view which shows Embodiment 1 of the 2nd sound absorption panel of this invention, and its C arrow directional view. It is the front view which shows Embodiment 2 of the 2nd sound absorption panel of this invention, and its D arrow directional view. It is the front view which shows Embodiment 3 of the 2nd sound absorption panel of this invention, and its E arrow directional view. It is the front view which shows Embodiment 4 of the 2nd sound absorption panel of this invention, and its F arrow directional view. It is the front view which shows Embodiment 5 of the 2nd sound absorption panel of this invention, and its G arrow directional view. It is the front view which shows embodiment of the 3rd sound absorption panel of this invention, and its H arrow directional view. It is the front view which shows embodiment of the 4th sound absorption panel of this invention, and its I arrow directional view. It is the front view which shows other Embodiment 1 of the sound absorption panel of this invention, and its J arrow directional view. It is the front view which shows other Embodiment 2 of the sound-absorbing panel of this invention, and its K arrow directional view. It is the front view which shows other Embodiment 3 of the sound-absorbing panel of this invention, and its L arrow line view.

Explanation of symbols

  10, 10-1, 10-2, 60, 72, 74, 78, 80, 82, 94, 98, 102, 103 ... sound absorbing panel, 10a, 10b ... side end face of sound absorbing panel, 10A, 10B ... two connected Sound absorbing panel, 12 ... flat plate, 14 ... corrugated plate, 14a ... corrugated valley portion, 14b ... corrugated peak portion, 20 ... first cavity, 22 ... first opening, 24 ... second Opening 26, 2nd cavity, 28 ... Existing ceiling or existing wall (existing interior surface), 32 ... Screw, 36 ... Sound room, 38 ... Existing wall, 44 ... Existing floor, 46 ... Existing ceiling, 62 ... Flat plate 64 ... partition plate, 68 ... cavity, 70 ... opening, 84 ... flat plate, 86 ... cylinder (cylinder), 90 ... cavity, 92 ... opening, 96 ... corrugated plate (plate having a non-planar surface), 100 ... chevron plates (plates with non-planar surfaces), 104 ... curved plates (plates with non-planar surfaces), 05 ... Tanikatachiban (plate having a non-planar surface)

Claims (17)

A sound-absorbing panel comprising a corrugated plate and a flat plate, the corrugated plate and the flat plate being overlapped with each other and mounted on the existing interior surface with the corrugated plate side facing the existing interior surface,
In each trough portion of the corrugated plate where the flat plate and the corrugated plate are separated from each other, the flat plate communicates with a first cavity formed between the flat plate and the trough portion of the corrugated plate. 1 opening is formed,
The crests of the corrugated plate and the corrugated plate are in contact with each other. The corrugated plate and the corrugated plate penetrate through both the plates and the corrugated crest and the existing interior surface. A sound absorbing panel formed by forming second openings communicating with second cavities formed therebetween.   A flat plate and a plurality of partition plates are arranged, and the plurality of partition plates are arranged on an existing interior surface with an appropriate space between each other, and the flat plate is covered on the surface on which the plurality of partition plates are arranged. A plurality of cavities mounted on the existing interior surface and partitioned by the partition plate between the existing interior surface and the flat plate, and openings that communicate with the plurality of cavities on the flat plate, respectively. A sound absorbing panel formed.   A flat plate and a plurality of tubes, the plurality of tubes are arranged on an existing interior surface, the flat plate is placed on a surface on which the plurality of tubes are arranged, and is mounted on the existing interior surface. A sound-absorbing panel formed by forming an opening that passes through a surface in contact with each cylinder and communicates with a cavity inside the cylinder.   The sound-absorbing panel according to any one of claims 1 to 3, wherein the flat plate is parallel or non-parallel to the existing interior surface. A corrugated plate and a plurality of cylinders, the plurality of cylinders arranged on an existing interior surface, the surface on which the plurality of cylinders are arranged has undulations, and the surface on which the plurality of cylinders are arranged A corrugated plate is attached to the existing interior surface so that the corrugated wave undulates in accordance with the undulation of the surface on which the plurality of tubes are arranged,
A sound-absorbing panel formed by forming an opening that passes through a surface where the corrugated plate and each cylinder are in contact with each other and communicates with a cavity inside the cylinder. Forming multiple cavities behind the non-planar front,
A sound-absorbing panel in which openings on the front surface are respectively connected to the plurality of cavities.   The sound-absorbing panel according to any one of claims 1 to 6, wherein a screw is inserted through the opening on the front surface and screwed into the existing interior surface to be fixed to the existing interior surface.   The sound absorbing panel according to any one of claims 1 to 7, wherein a space between the cavities is uniform or non-uniform.   The sound absorbing panel according to any one of claims 1 to 8, wherein all of the plurality of cavities are linear, or a part or all of the cavities are bent in the middle.   The sound-absorbing panel according to any one of claims 1 to 9, wherein the opening is configured by a rectangular hole or a plurality of slit-shaped holes.   The sound-absorbing panel according to any one of claims 1 to 10, wherein the opening is provided at one place or a plurality of places per one cavity.   The sound-absorbing panel according to any one of claims 1 to 11, wherein the opening is provided for each cavity at discrete positions in the extending direction of the cavity.   13. The device according to claim 1, wherein both ends of the plurality of cavities are opened in common or for each of the cavities, or both ends are closed, or one end is opened and the other end is closed. Sound absorbing panel.   The sound-absorbing panel according to claim 13, wherein a flow resistance material is attached to one open end or both open ends of the cavity.   An acoustic chamber formed by mounting the sound absorbing panel according to any one of claims 1 to 14 on an existing interior surface.   The acoustic chamber according to claim 15, wherein one end of a cavity of the sound absorbing panel mounted on the existing interior surface is closed by another existing interior surface orthogonal to the mounting surface.   A room acoustic characteristic adjustment method for adjusting an acoustic characteristic of a room by mounting the sound absorbing panel according to any one of claims 1 to 14 on an existing interior surface of the room.

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