Sound insulation structure

Abstract

To provide a sound insulation structure capable of enhancing sound insulation from one space to the other space simply and effectively.SOLUTION: A sound insulation structure for suppressing sound entering a second space (Ri) from a first space (Ro) at a sound source through a partition surface (91) partitioning the first space and the second space, is provided with: a cylindrical column member (20) erected in the second space with a space from the partition surface and including a first facing plate part (20b) facing the partition surface; and a support member (30) supporting the column member. In the first facing plate part, multiple through holes (23) are arranged with a gap to each other in a vertical direction, so the first facing plate part constitutes a perforated plate of a Helmholtz resonator.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a sound insulating structure, and in particular to a sound insulating structure that can be retrofitted to a room within a building. [Background technology]

[0002] As a soundproofing measure for the walls of rooms in a building, there are commercially available products that combine sound-absorbing material (such as glass wool) with a thin soundproofing sheet and stick it on the walls of the room. As disclosed in Utility Model Registration No. 3239254 (Patent Document 1), there are also soundproof curtains that are easily attached and removed by using a pair of tension rods that tension the floor and ceiling of the room. These soundproof curtains can have commercially available soundproof panels built in.

[0003] Japanese Patent Laid-Open Publication No. 2002-356934 (Patent Document 2) proposes a soundproofing structure that can block low-frequency sounds by providing a Helmholtz resonator between double walls or double windows. Also, Japanese Patent Laid-Open Publication No. 2005-146650 (Patent Document 3) proposes a soundproofing structure in which a stud between double walls is used as a Helmholtz resonator by forming a cylindrical neck on the side of the stud (the surface facing the air space between the studs). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Utility Model Registration No. 3239254 [Patent Document 2] JP 2002-356934 A [Patent Document 3] JP 2005-146650 A Summary of the Invention [Problem to be solved by the invention]

[0005] Commercially available soundproofing panels do not require carpentry work and are easy to restore to their original state, so they can be used in rental housing, etc. However, such soundproofing panels are made of light materials because they are required to be easy to install, and although they are effective in blocking high-frequency sounds, they are less effective at blocking low and mid-frequency sounds (the main range of sounds in daily life, 250 to 1000 Hz).

[0006] The Helmholtz resonators in Patent Documents 2 and 3 have a neck facing the hollow layer (air layer) between two wall members (surface materials), and are configured to absorb sound that enters the hollow layer. With such a configuration, for example, when trying to block out living sounds coming from the next room through a partition wall, it is possible that the intended sound insulation cannot be achieved. In addition, Patent Document 3 requires the formation of multiple cylindrical necks in the partition, which raises concerns about increased manufacturing costs.

[0007] The present invention has been made to solve the above-mentioned problems, and its object is to provide a sound-proofing structure that can easily and effectively increase sound insulation from one space to another. [Means for solving the problem]

[0008] A sound-proofing structure according to an aspect of the present invention is a sound-proofing structure for blocking sound entering a second space from a first space on the sound source side through a partition surface that separates the first space from a second space, the sound-proofing structure comprising: a cylindrical pillar member that is erected in the second space with a gap between it and the partition surface and includes a first facing plate portion facing the partition surface; and a support member that supports the pillar member. The first facing plate portion has a plurality of through holes spaced apart in the vertical direction, and the first facing plate portion constitutes a perforated plate of a Helmholtz resonator.

[0009] Preferably, the pillar member includes an angular stud having a surface portion on the second space side and a back portion on the first space side, and a plate member overlapping and fixed to the back portion and extending in the vertical direction, and the first facing plate portion is formed by the back portion of the stud and the plate member.

[0010] It is desirable that at least one of the thickness dimension of the plate member, the diameter of the through holes, and the arrangement pitch of the through holes is selected according to the target sound absorption frequency of the pillar member.

[0011] Preferably, the soundproof structure further comprises a soundproof panel member fixed to the surface of the stud and exposed to the second space, in which case the soundproof structure functions as a soundproof wall.

[0012] More preferably, the soundproofing structure further includes a sound-absorbing material located in the air layer between the partition surface and the soundproof panel member and provided between adjacent pillar members in the left-right direction.

[0013] Preferably, the support member includes a second plate portion extending in the left-right direction and facing the partition surface. The second plate portion has a plurality of through holes spaced apart in the left-right direction, and the second plate portion and the first plate portion form a perforated plate of the Helmholtz resonator.

[0014] Preferably, the support member includes a runner having a pair of flanges and a hollow box body assembled into at least a part of the runner. In this case, the second facing plate portion is composed of a rear flange portion of the pair of flanges located on the first space side and a side plate portion of the box body overlapped with the rear flange portion. Effect of the Invention

[0015] According to the present invention, it is possible to simply and effectively improve sound insulation from one space to another. [Brief description of the drawings]

[0016] [Figure 1] 1 is a front view of a retrofit soundproof wall according to an embodiment of the present invention as viewed from the user's room side. [Diagram 2] FIG. 1A is a vertical cross-sectional view showing a retrofit soundproof wall according to an embodiment of the present invention, and FIG. [Diagram 3]FIG. 2A is a cross-sectional view showing a typical installation state of a pole member in an embodiment of the present invention, and FIG. 2B is a perspective view showing a typical configuration example of the pole member. [Figure 4] FIG. 1A is a cross-sectional view showing a schematic installation state of a support member according to an embodiment of the present invention, and FIG. 1B is a perspective view showing a schematic configuration example of the support member. [Diagram 5] FIG. 13 is a diagram showing a comparative example of a sound-proofing structure according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0017] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail with reference to the drawings. In the drawings, the same or corresponding parts are designated by the same reference characters and their description will not be repeated.

[0018] In this embodiment, a soundproof wall that can be attached to an existing wall of a building will be described. In this embodiment, it is assumed that the existing wall is a partition wall of an apartment building. The soundproof wall according to this embodiment has a soundproof structure for blocking sound that passes through the partition wall from the adjacent room (first space) on the sound source side and enters the user's room (second space).

[0019] (Outline of retrofit soundproof wall) A schematic configuration of a retrofit soundproof wall 10 according to this embodiment will be described with reference to Fig. 1 and Fig. 2. Fig. 1 is a front view of the retrofit soundproof wall 10 as viewed from the user's room Ri side. Fig. 2(A) is a vertical cross-sectional view showing the retrofit soundproof wall 10, which corresponds to the line IIA-IIA in Fig. 1. Fig. 2(B) is a rear view of the retrofit soundproof wall 10 as viewed from the IIB direction (from the existing wall 91) in Fig. 2(A).

[0020] 2(A), a retrofit soundproof wall (hereinafter abbreviated as "soundproof wall") 10 is provided in front of an existing wall 91 (inside room Ri) in order to insulate sound entering room Ri from the adjacent room Ro through the existing wall 91. The existing wall 91 is a partition wall that constitutes a partition surface separating room Ri from the adjacent room Ro. In FIG. 1 and other figures, the width direction and the vertical direction of the existing wall 91 are indicated by arrows A1 and A2, respectively. Also, the depth direction of the existing wall 91, which is the direction in which sound enters from the adjacent room Ro toward room Ri, is indicated by arrow A3.

[0021] The soundproof wall 10 comprises a plurality of cylindrical pillar members 20 extending vertically at intervals between them and the existing wall 91, a support member 30 supporting the pillar members 20, and a soundproof panel member 40 attached and fixed to the face (front surface) of the pillar member 20 facing the room Ri. The soundproof panel member 40 is exposed to the room Ri. A double wall is simply formed by the existing wall 91 and the soundproof panel member 40 of the soundproof wall 10. The soundproof panel member 40 is composed of a plurality of soundproof panels arranged vertically and horizontally. The soundproof panels may be commercially available products that incorporate sound-absorbing material such as glass wool. The soundproof panels can be cut to a desired size and shape (for example, so as not to cover a window or air conditioner).

[0022] As shown in FIG. 1 and FIG. 2(B), the plurality of pillar members 20 are arranged at intervals (for example, at a fixed interval) along the left-right direction. Typically, one pillar member 20 is provided at each of both left-right ends of the existing wall 91, and at least one is provided in the center. Since the pillar members 20 are arranged away from the existing wall 91, as shown in FIG. 3(A) described later, not only a space (hereinafter referred to as an "air layer") 52 between adjacent pillar members 20 in the left-right direction but also a space (hereinafter referred to as a "pillar back space") 51 is formed on the back side of the pillar member 20 (the side of the adjacent room Ro) between the existing wall 91 and the soundproof panel member 40. Note that it is sufficient that at least one pair of pillar members 20 is provided on the left and right. The air layer 52 may be filled with a sound absorbing material such as glass wool (not shown).

[0023] As shown in Fig. 1 and Fig. 2(B), the support member 30 includes an upper runner 31 and a lower runner 32 that receive the upper and lower ends of the column member 20. These runners 31, 32 extend in the left-right direction with a gap between them and an existing wall 91. The upper runner 31 is fixed to a ceiling surface 92 of the room Ri, and the lower runner 32 is fixed to a floor surface 93 of the room Ri. It is preferable that the runners 31, 32 are fixed by tension rods (not shown) that extend in the vertical direction. The tension rods may be integrated with the column member 20.

[0024] 3, the soundproof wall 10 according to this embodiment includes a soundproof panel member 40 facing the existing wall 91 via the air space 52, so that sound that passes through the existing wall 91 and enters the air space 52 can be absorbed by the soundproof panel member 40. In addition, in this embodiment, the pillar member 20 and the support member 30, which are disposed away from the existing wall 91, are both made to function as Helmholtz resonators, so that sound that passes through the existing wall 91 and enters the pillar back space 51 is absorbed by the pillar member 20 and the support member 30. This makes it possible to effectively prevent sound leakage from the adjacent room Ro.

[0025] Specific configuration examples of the pillar member 20 and the support member 30 will be described below.

[0026] (About the structure of the pillar components) Further referring to Fig. 3, a configuration example of the pole member 20 will be described. Fig. 3(A) is a cross-sectional view showing a typical installation state of the pole member 20, and corresponds to line IIIA-IIIA in Fig. 2(A). Fig. 3(B) is an exploded perspective view showing a typical configuration example of the pole member 20.

[0027] As shown in Figs. 3(A) and (B), the column member 20 includes a rectangular stud 21 extending in the vertical direction and a plate member 22 provided integrally with the stud 21. The stud 21 includes a front surface 211 on the room Ri side and a back surface 212 on the adjacent room Ro side (the existing wall 91 side). The stud 21 may be a commercially available product, for example a lightweight steel stud. The plate member 22 extends in the vertical direction, overlapping the back surface 212 of the stud 21. The plate member 22 is made of, for example, flat plywood, and is fixed in a state of surface contact with the outside of the back surface 212 of the stud 21. In this case, the plate member 22 is fixed facing the existing wall 91.

[0028] A front surface 211 of the stud 21 constitutes a fixing portion 20a for fixing the soundproof panel member 40. A back surface 212 of the stud 21, together with the plate member 22, constitutes a facing plate portion (first facing plate portion) 20b that faces the existing wall 91.

[0029] The stud 21 has a rectangular cylindrical shape with a width dimension L1 of 40 mm, a depth dimension L2 of 50 mm, and a thickness dimension T1 of 0.5 mm, for example. The length dimension of the stud 21 is determined according to the height of the existing wall 91. The left and right ends of the soundproof panel member 40 are fixed to the surface portion 211 of the stud 21 with fixing hardware, adhesive, or the like. Note that, although a rectangular shape that is long in the depth direction has been shown as an example of the shape of the stud 21, it may also be a rectangular shape that is long in the left and right direction, or a square shape.

[0030] The plate member 22 is long in the vertical direction and has a length equal to that of the stud 21. The plate member 22 typically has a thickness (T2) greater than the thickness dimension T1 of the stud 21. In this embodiment, the width dimension L3 of the plate member 22 is approximately the same as the width dimension L1 of the stud 21, and the back surface 212 of the stud 21 is covered by the plate member 22. The width dimension L3 of the plate member 22 may be slightly shorter or longer than the width dimension L1 of the stud 21. As shown in FIG. 2(A), the plate member 22 may be shorter than the stud 21, and only the stud 21 may be fitted into the runners 31, 32.

[0031] As shown in FIG. 2(B) and the like, the facing plate portion 20b of the column member 20 has a plurality of through holes 23 that penetrate in the plate thickness direction and are provided at a constant pitch Pa in the vertical direction. The through holes 23 penetrate both the back surface portion 212 of the stud 21 and the plate member 22. As shown in FIG. 3(B), the through holes 23 are composed of a round hole 231 that penetrates the back surface portion 212 of the stud 21 and a round hole 232 that penetrates the plate member 22. The positions and sizes (diameters) of the round holes 231 and 232 are the same. All the through holes 23 in the facing plate portion 20b are the same size, and the facing plate portion 20b constitutes a perforated plate of the Helmholtz resonator. That is, the annular portion surrounding the through holes 23 in the facing plate portion 20b can function as the neck of the Helmholtz resonator.

[0032] The frequency (resonant frequency) that can be absorbed by the pillar member 20 can be calculated by a known formula such as that shown in Patent Document 3. Referring to FIG. 2(A), the resonant frequency of the pillar member 20 is calculated from the area d of the through hole 23, the thickness dimension l of the facing plate portion 20b, the depth dimension L of the space in the stud 21, and the number n of the through holes 23 per unit area. As an example, assuming that the area d of the through hole 23 is 20 mm, the thickness dimension l (T1+T2) of the facing plate portion 20b is 15 mm (in the above example, the thickness dimension T2 of the plate member 22 is 10 mm), the depth dimension L of the space in the stud 21 is 40 mm, and the number n of the through holes 23 per unit area is 100 (the pitch Pa of the through holes 23 is 100 mm), the resonant frequency is about 272 Hz. From this calculation result, it can be seen that the pillar member 20 can absorb mid-low range sounds intensively.

[0033] By fixing the specifications (size, plate thickness) of the studs 21 and adjusting the thickness dimension T2 of the plate member 22, the diameter of the through holes 23, and the arrangement pitch Pa of the through holes 23, it is possible to absorb sound of a desired frequency in the pillar member 20. It is also possible to fix any one of the values ​​of the thickness dimension T2 of the plate member 22, the diameter of the through holes 23, and the arrangement pitch Pa of the through holes 23, and adjust only the other values. In other words, it is desirable that at least one of the thickness dimension of the plate member 22, the diameter of the through holes 23, and the arrangement pitch Pa of the through holes 23 is selected according to the target sound absorption frequency of the pillar member 20. The target sound absorption frequency is assumed to be, for example, in the 250Hz to 1000Hz band.

[0034] (Examples of the support member configuration) Further referring to Fig. 4, a configuration example of the support member 30 will be described. Fig. 4(A) is a cross-sectional view showing a schematic installation state of the support member 30, and corresponds to the line IVA-IVA in Fig. 2(A). Fig. 4(B) is a perspective view showing a schematic configuration example of the support member 30.

[0035] As shown in Fig. 2(B) and Fig. 4(A) and (B), the support member 30 includes an upper runner 31 and a lower runner 32 extending in the left-right direction, and a plurality of box bodies 33 integrally assembled with each of the runners 31, 32. The box bodies 33 are fixed in a state of being fitted inside the runners 31, 32. The runners 31, 32 are commercially available products, and are, for example, lightweight runners made of steel. The box bodies 33 are, for example, made of wood.

[0036] The box body 33 is provided in an area different from the fitting area in which the vertical ends of the studs 21 (pillar members 20) are fitted within the runners 31, 32. In other words, the box body 33 is disposed between the ends of the studs 21 adjacent to each other in the left-right direction.

[0037] The box body 33 has a rectangular parallelepiped shape that is long in the left-right direction. The box body 33 is hollow. The box body 33 has a pair of horizontal plate parts 331, 332 that are in surface contact with the pair of flange parts 311, 312 of each runner 31, 32 and extend in the left-right direction, a pair of vertical plate parts 333, 334 that connect the ends of the pair of horizontal plate parts 331, 332 and extend in the depth direction, and a bottom plate part 335 that closes the space surrounded on all sides by the horizontal plate parts 331, 332 and the vertical plate parts 333, 334. Such a box body 33 is fixed to the runners 31, 32 in a state where it is abutted against the bottom surface parts 313 of the runners 31, 32. The box body 33 is fixed by, for example, an adhesive or the like.

[0038] The flange 311 on the front side of the runner 31, together with the horizontal plate portion 331 of the box body 33, constitutes the fixing portion 30a for fixing the soundproof panel member 40. The flange 312 on the back side of the runner 31, together with the horizontal plate portion 332 of the box body 33, constitutes the facing plate portion (second facing plate portion) 30b that faces the existing wall 91. Note that the horizontal plate portion 331 of the box body 33 that constitutes the fixing portion 30a may be omitted.

[0039] 4(A), thickness dimension T3 of runners 31, 32 may be equal to thickness dimension T1 of stud 21, and is, for example, 0.5 mm. Thickness dimension T4 of horizontal plate portion 332 of box body 33 constituting facing plate portion 30b is typically larger than thickness dimension T3 of runners 31, 32.

[0040] As shown in FIG. 2(B) and FIG. 4(B), the facing plate portion 30b of the support member 30 has a plurality of through holes 34 penetrating in the plate thickness direction at a constant pitch Pb in the left-right direction. The through holes 34 penetrate both the flange portion 312 of the runners 31, 32 and the horizontal plate portion 332 of the box body 33. As shown in FIG. 4(A) and (B), the through hole 34 is formed by a round hole 341 penetrating the flange portion 312 of the runners 31, 32 and a round hole 342 penetrating the horizontal plate portion 332. The positions and sizes (diameters) of the round holes 341 and 342 are the same. All the through holes 34 of the facing plate portion 30b are the same size, and the facing plate portion 30b constitutes a perforated plate. That is, the annular portion surrounding the through hole 34 in the facing plate portion 30b can function as the neck of the Helmholtz resonator.

[0041] The frequency (resonant frequency) that can be absorbed by the support member 30 can also be calculated in a manner similar to that of the column member 20. In the support member 30, the specifications (size, plate thickness) of the runners 31, 32 are fixed, and the plate thickness dimension T4 of the box body 33, the diameter of the through holes 34, and the arrangement pitch Pb of the through holes 34 are adjusted, so that sound of a desired frequency can be absorbed in the support member 30. In this case as well, it is desirable that at least one of the plate thickness dimension T4 of the box body 33, the diameter of the through holes 34, and the arrangement pitch Pb of the through holes 34 is selected according to the target sound absorption frequency in the support member 30.

[0042] In this embodiment, since the box body 33 is incorporated inside the runners 31, 32, the depth dimension (L) of the space (hollow inside the support member 30) 30s inside the box body 33 is slightly shorter than the depth dimension of the space (hollow inside the pillar member 20) 20s of the stud 21. Therefore, for example, by making the arrangement pitch Pb of the through holes 34 shorter (or longer) than the arrangement pitch Pa of the through holes 23 of the pillar member 20, the frequency bands absorbed by the pillar member 20 and the support member 30 may be made to match.

[0043] Alternatively, in this embodiment, the plate member 22 is provided on the outside of the stud 21, but the plate member 22 may be provided (inserted) on the inside of the stud 21 so that the depth dimension of the cavity 20s in the column member 20 and the depth dimension of the cavity 30s in the support member 30 are approximately equal to each other. In this case, the plate thickness dimension T4 of the box body 33 and the arrangement pitch Pb of the through holes 34 can be adjusted in the same manner as the thickness dimension T2 of the plate member 22 of the column member 20 and the arrangement pitch Pa of the through holes 23.

[0044] Alternatively, it is possible to achieve the same conditions as the pillar member 20 by arranging the horizontal plate portions 332 of the box body 33 outside the flange portions 312 of the runners 31, 32. In this case, the box body 33 can be configured to include, for example, a U-shaped member that contains (fits from the outside) the pair of flange portions 311, 312 of the runners 31, 32, and a pair of side plate portions that are perpendicular to the pair of flange portions 311, 312.

[0045] (Effects of soundproof walls) As described above, the soundproof wall 10 includes the column member 20 and the support member 30 arranged away from the existing wall 91 of the building, and the column member 20 and the support member 30 include perforated plates having a plurality of through holes 23, 34 communicating with the column back space 51, i.e., the facing plate portions 20b, 30b. In other words, the through holes 23, 34 are provided facing the perpendicular sound incidence direction. As a result, the soundproof wall 10 of this embodiment can absorb sounds in a targeted frequency band. A comparative example of the soundproof wall 10 of this embodiment is shown in FIG. 5.

[0046] 5 includes a stud 121 and panel members 141, 142 fixed to both sides of the stud 121 in the depth direction. One side of the stud 121 is provided with a neck portion 123 that opens toward an air space 152. In this case, even if there is a certain degree of sound absorption effect for sound that passes through the panel member 142 on the side of the adjacent room Ro and enters the air space 152, sound that passes through the panel member 142 and enters the stud 121 is propagated by solids to the panel member 142 on the side of the room Ri, and therefore the expected sound absorption effect cannot be expected. In addition, even if the protruding length of the neck portion 123 is adjusted, it is difficult to obtain a sound absorption effect at the desired frequency.

[0047] In contrast, in the present embodiment, the sound that has passed through the existing wall 91 is perpendicularly incident on the through holes 23 and 34, and therefore, it is possible to effectively block sounds in a desired frequency band.

[0048] Moreover, since the soundproof panel members 40, which are unique in absorbing high-pitched sounds, are fixed to the pillar members 20 and the support members 30, the soundproof wall 10 of this embodiment can achieve a soundproofing effect against sounds in a wide frequency range. Furthermore, in a configuration in which a sound-absorbing material is disposed in the air space 52 between the pillar members 20, a higher soundproofing effect is expected.

[0049] Furthermore, since the soundproof wall 10 of this embodiment can be installed by making at least one pair of pillar members 20 stand on their own, the user can install the soundproof wall 10 in an existing room Ri. In other words, unlike soundproofing work by a large builder, soundproofing measures for the room Ri can be easily implemented because no other person is involved. In addition, by using a tension rod (not shown), fixing to the room Ri with screws or the like is not required, so restoration to the original state is easy. Therefore, the soundproof wall 10 is also suitable for rental housing. The support member 30 may be provided only on the floor surface 93 side of the room Ri. In this case, the pillar members 20 may be directly fixed to the ceiling surface 92 with a tension rod.

[0050] (Modification) In this embodiment, one pole member 20 includes one stud 21, but one pole member 20 may include a plurality of (for example, two) studs that are adjacent or close to each other.

[0051] In the present embodiment, the configuration in which both the pillar member 20 and the support member 30 function as Helmholtz resonators has been shown, but it is sufficient that at least one of them (for example, the pillar member 20) functions as a Helmholtz resonator. In that case, the support member for supporting the pillar member 20 in the room Ri may be realized by a member other than a runner.

[0052] Furthermore, in this embodiment, the soundproof wall 10 includes the soundproof panel members 40, but the soundproof panel members 40 may be omitted, and the pillar members 20 and the support members 30 may be exposed.

[0053] In addition, in the present embodiment, an example in which the soundproof wall 10 is installed in close proximity to the existing wall 91 has been described, but the present invention is not limited to such an example, and the soundproof wall 10 may be disposed between two spaces. For example, the partition surface separating the first space on the sound source side from the second space (e.g., the space where the user spends time) may be a virtual surface. Alternatively, the present invention is not limited to an example in which the soundproof wall 10 is added later, and may be applied as a partition wall configuration for a building.

[0054] The soundproofing structure of the present embodiment can also be applied to double-glazed windows and the like.

[0055] The embodiments disclosed herein should be considered to be illustrative and not restrictive in all respects. The scope of the present invention is defined by the claims, not the above description, and is intended to include all modifications within the meaning and scope of the claims. [Explanation of symbols]

[0056] 10 retrofit soundproof wall, 20 pillar member, 20b, 30b facing board portion, 21 stud, 22 board member, 23, 34 through hole, 30 support member, 31, 32 runner, 33 box body, 40 soundproof panel member, 51 back space of pillar, 52 air layer, 91 existing wall (partition surface), Ri room, Ro adjacent room.

Claims

1. A sound insulating structure for insulating a sound incident from a first space on a sound source side through a partition surface that separates the first space and a second space into the second space, a cylindrical pillar member provided in the second space with a gap between it and the partition surface and including a first facing plate portion facing the partition surface; a support member for supporting the column member, The first facing plate portion is provided with a plurality of through holes spaced apart in the vertical direction, 11. A sound-proofing structure, comprising: the first facing plate portion forming a perforated plate of a Helmholtz resonator.

2. The pillar member includes a rectangular stud including a surface portion on the second space side and a back surface portion on the first space side, and a plate member overlapping and fixed to the back surface and extending in the vertical direction, 2. The soundproofing structure according to claim 1, wherein the first facing plate portion is constituted by the back surface of the stud and the plate member.

3. 3. The sound insulation structure according to claim 2, wherein at least one of a thickness dimension of the plate member, a diameter of the through holes, and an arrangement pitch of the through holes is selected according to a target sound absorption frequency of the pillar member.

4. The soundproof structure according to claim 2 , further comprising a soundproof panel member fixed to the surface portion of the stud and exposed to the second space.

5. 5. The soundproofing structure according to claim 4, further comprising a sound-absorbing material located in the air layer between the partition surface and the soundproofing panel member and provided between the pillar members adjacent in the left-right direction.

6. The support member includes a second facing plate portion extending in the left-right direction and facing the partition surface, The second facing plate portion is provided with a plurality of through holes spaced apart in the left-right direction, 2. The sound insulating structure of claim 1, wherein the second plate portion together with the first plate portion constitutes a perforated plate of a Helmholtz resonator.

7. The support member includes a runner having a pair of flanges and a hollow box body incorporated into at least a portion of the runner, 7. The sound-proofing structure according to claim 6, wherein the second facing plate portion is composed of a rear flange portion of the pair of flange portions that is located on the first space side, and a side plate portion of the box body that is overlapped with the rear flange portion.

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