JP2020114990A - Acoustical panel and sound proof wall - Google Patents

Abstract

To provide an acoustical panel and a sound proof wall equipped with the same which are less likely to be damaged even in the event of contact or collision.SOLUTION: A sound proof panel 1 for absorbing noise from a noise source to reduce the spread of noise, comprises: a panel body 2 being a metal body with an open front surface facing the noise source; and a sound absorption material 3 accommodated in the panel body 2 to absorb noise. The front surface of the panel body 2 is covered with a face material 4 made of a fiber material and having a cushioning property in a state where the sound absorption material 3 is accommodated. The face material 4 is fixed to the panel body 2 via strip-like pressing fittings 5 at a position concealed by support posts H1 being the right and left ends.SELECTED DRAWING: Figure 2

Description

TECHNICAL FIELD The present invention relates to a noise panel and a noise barrier that absorb noise from a noise source to suppress noise diffusion.

Conventionally, in order to suppress the diffusion of noise emitted from noise sources such as vehicles or factories traveling on roads or railroad tracks, soundproof walls have been installed beside the roads or railroads or near the boundaries of the site. This type of soundproof wall is generally constructed by fitting soundproof panels in a plurality of stages and stacking them between columns made of H-shaped steel or the like.

In a soundproof panel, a sound absorbing material such as a foamed resin or a fiber material is usually housed in a box-shaped metal housing having holes or slits. For example, Patent Document 1 includes a front plate 20, a rear plate 22 that faces the front plate 20, and a bottom plate 12 that connects the front plate 20 and the rear plate 22 together with the front plate 20. There is disclosed a sound absorbing panel 10 including a housing 16 provided with a discharge port 44 for discharging the liquid in the accommodation space 29 formed by the back plate 22 and the bottom plate 12 (claims of Patent Document 1). Item 1, paragraphs [0013] to [0027] of the specification, FIGS. 1 to 4 etc. of the drawings).

Conventional sound barriers were not installed in places where ordinary people, especially children, run around for play, but in recent years, we have taken into consideration that the noise of children, especially children, is noisy, and sound barriers around the kindergarten. Is being considered. However, unlike the conventional installation place, the following problems will occur when it is installed in a place where people, especially children, can play around. That is, in the sound absorbing panel 10 described in Patent Document 1, since the sharp edge surface of the metal such as the opening 24 is exposed, there is a risk of injury if the sound absorbing panel 10 contacts or collides with the sound absorbing panel 10. In particular, soundproof panels and soundproof walls installed in places where children can play and run around, such as kindergartens and elementary schools, are required to have high safety. The wall was coveted.

Further, in Patent Document 2, the sound source has a sound absorbing part (1) facing the front side and a back wall part (21) arranged on the back side of the sound absorbing part, and the front side of the sound absorbing part is exposed. In the state, the accommodating part (2) for accommodating the sound absorbing part, the upper support part (3) provided on the upper part of the accommodating part and supporting the upper part of the sound absorbing part, and the lower part of the accommodating part, the lower part of the sound absorbing part A soundproof panel (100) including a lower support portion (4) for supporting and a side wall portion (5) provided on a side portion of a housing portion is disclosed (claims of Patent Document 2). 1, paragraphs [0027] to [0039] of the specification, FIG. 2 of the drawings, etc.).

However, in the soundproof panel (100) described in Patent Document 2, although the sound absorbing part is exposed without providing a metal plate on the front side that is the noise source side, one considering the contact and collision of children and the like. Was not. For this reason, the metal support frame and the middle crosspiece are exposed, and there has been a problem that the risk of injury due to contact or collision of a child or the like cannot be eliminated in the past.

Further, a conventional soundproof panel such as the soundproof panel (100) described in Patent Document 2 is mainly intended to absorb noise generated by a vehicle traveling on a road or railroad track and mechanical noise generated by a factory or the like. It was. Therefore, in the conventional soundproof panel, it is impossible to sufficiently absorb and prevent human voice whose frequency band is different from those of these noises, particularly, noise in a high sound range (for example, 1000 Hz to 2000 Hz) emitted by an infant. There was also a problem.

JP, 2013-83112, A JP, 2016-108930, A

Therefore, the present invention has been devised in view of the above-mentioned problems, and an object thereof is to provide a soundproof panel and a soundproof wall that are less likely to be injured even if they come into contact with or collide with each other.

A soundproof panel according to a first aspect of the present invention is a soundproof panel that constructs a soundproof wall that may come into contact with a person who absorbs noise from a noise source and suppresses noise diffusion, and has a front surface that is a noise source side open. And a sound absorbing material that is housed in the panel body and absorbs noise. The front surface of the panel body is made of a fiber material and has a cushioning surface material. The panel body is covered up to the upper and lower end portions of the front face in a state where the panel body is accommodated, and the face material is at a position where it is concealed by columns that are left and right ends, and the panel body is provided through a strip-shaped presser foot. It is characterized by being fixed to.

Soundproofing panel according to the second invention, in the first invention, the basis weight of the surface material, characterized in that it is a 210g / ^{m 2} or more 720 g / ^{m 2} or less.

A soundproof panel according to a third invention is the soundproof panel according to the first invention or the second invention, wherein a groove for improving bending rigidity is formed on the back surface of the panel body, and the sound absorbing material is inserted around the groove. It is characterized by being.

In the soundproof wall according to the fourth aspect of the present invention, a plurality of support columns are contacted with the plurality of support columns, in which a plurality of stages of soundproof panels that absorb noise from a noise source and suppress diffusion of noise are inserted. A soundproof wall having a possibility, wherein the soundproof panel includes a panel main body that is a metal housing with an open front facing the noise source side, and a sound absorbing material that is housed in the panel main body and absorbs noise. The front surface of the panel body is covered up to the upper and lower end portions of the front surface of the panel body in a state where the sound absorbing material is accommodated by a surface material made of a fiber material and having a cushioning property. It is characterized in that it is fixed to the panel main body through a strip-shaped presser piece at a position where it is concealed by a pillar as an end portion.

A soundproof wall according to a fifth aspect of the present invention is the soundproof wall according to the fourth aspect of the present invention, in which both left and right end portions of the face member are fixed to the panel body by screws via strip-shaped presser members, and the presser members are concealed by the columns. It is characterized by being.

According to the first invention to the third invention, since the front surface of the panel main body made of the metal housing is covered with the cushioning surface material, even when a person such as an infant contacts or collides with the surface material. , There is very little risk of injury such as a finger or part of the body being caught.

Further, according to the first invention to the third invention, since the face material made of a fibrous material having a gap through which sound is transmitted is covered, the noise that is transmitted without being reflected by the face material is absorbed by the sound absorbing material. Sound can be reliably absorbed.

In addition, according to the first to third inventions, the face material is fixed to the panel body via the strip-shaped presser foot at the position hidden by the columns which are the left and right ends, so that the sharpness is sharp. It is possible to reliably prevent the face material from sagging, bending, or wrinkling without exposing the metal member. For this reason, not only does it look good, but there is less risk of damage to the soundproof panel due to wind and rain, and durability is improved.

In particular, according to the second invention, the basis weight of the surface material so that a ^{210g / m 2 ~720g / m 2} , a conventional, of 1000Hz~2000Hz corresponding to the child's voice which was difficult to sound absorption It is possible to reliably absorb noise in the frequency band.

In particular, according to the third aspect, since the groove for improving the bending rigidity is formed, the bending rigidity of the soundproof panel is improved, and the soundproof panel is less likely to be damaged by wind load, and the durability is improved. In addition, since the sound absorbing material is also placed in the space around the groove, filling the sound insulating material without creating the space not only prevents bending but improves rigidity and durability, but also further improves the sound absorption coefficient. However, the diffusion of noise can be suppressed.

According to the fourth aspect of the invention, since the front surface of the panel body made of the metal casing is covered with the cushioning surface material, even if a person such as an infant or a child contacts or collides with the finger, It is extremely unlikely to get injured, such as a person or a part of the body being caught. Further, since the face material made of a fibrous material having a gap through which sound is transmitted is covered, the transmitted noise can be reliably absorbed by the sound absorbing material without being reflected by the face material.

In particular, according to the fifth aspect of the invention, the left and right end portions of the face material are screwed and fixed to the panel body via the strip-shaped presser foot, and since the presser foot is hidden by the columns, a sharp metal member is used. Without exposing the member, it is possible to reliably prevent the face material from sagging, bending, or wrinkling. For this reason, not only does it look good, but there is less risk of damage to the soundproof panel due to wind and rain, and durability is improved.

It is the whole front view showing the soundproof wall concerning an embodiment of the invention. It is an exploded perspective view showing composition of a soundproof panel concerning an embodiment of the invention. It is a perspective view which shows the soundproof panel same as the above. It is a front view which shows the soundproof panel same as the above. It is a vertical cross section which shows the soundproof panel same as the above. It is a perspective view which shows the panel main body of the soundproof panel same as the above. It is a right view which shows the panel main body same as the above. It is a perspective view which shows the surface material of the soundproof panel same as the above. It is a perspective view showing a presser metal object of a soundproof panel same as the above. It is a graph which shows the result of the normal incidence sound absorption coefficient measurement test of the soundproof panel same as the above.

Hereinafter, a soundproof panel and a soundproof wall according to embodiments of the present invention will be described in detail with reference to the drawings.

First, the soundproof panel according to the embodiment of the present invention will be described with reference to FIGS. 1 to 9. FIG. 1 is an overall front view showing a soundproof wall according to an embodiment of the present invention. As shown in FIG. 1, a soundproof panel 1 according to an embodiment of the present invention has a plurality of stages (in the illustrated embodiment, between a plurality of steel columns H1,..., H1 such as H-section steel and channel steel. It is a panel that is installed over 5 stages and constitutes a soundproof wall that suppresses the diffusion of noise by absorbing the noise from the noise source.

2 is an exploded perspective view showing the configuration of the soundproof panel 1 according to the embodiment of the present invention, FIG. 3 is a perspective view showing the soundproof panel 1, and FIG. 4 is a front view of the soundproof panel 1. As shown in FIGS. 2 to 4, the soundproof panel 1 according to the present embodiment is a substantially rectangular parallelepiped panel having a generally horizontal shape, and absorbs noise from a noise source with a sound absorbing material or the like described later to diffuse the noise. It has the function of suppressing.

As shown in FIG. 2, the soundproof panel 1 according to the present embodiment includes a panel body 2 which is a metal housing having an open front surface, and a sound absorbing material 3 which is housed in the panel body 2 and absorbs noise. It is composed of a face material 4 that covers the upper surface of the panel body 2, and a presser metal 5 that fixes the left and right ends of the face material 4 to the panel body 2.

(Panel body)
5 is a vertical cross-sectional view showing the soundproof panel 1, FIG. 6 is a perspective view showing the panel body 2 alone of the soundproof panel 1, and FIG. 7 is a right side view showing the panel body 2. As shown in FIGS. 5 to 7, the panel body 2 according to the present embodiment is made of a structural steel plate having a thickness of about 1.6 mm that constitutes the back surface (back plate) of the soundproof panel 1, This is a rectangular box-shaped housing in front view with the front face opened.

As shown in FIG. 5, the panel body 2 has a function of accommodating the sound absorbing material 3 and ensuring the strength and bending rigidity of the entire soundproof panel 1. It should be noted that the front view refers to the view from the noise side to the outside in the horizontal direction orthogonal to the soundproof wall, and the same hereinafter.

As shown in FIGS. 6 and 7, the panel body 2 includes a rear panel 20 having a rectangular shape in a front view, an upper panel 21 and a lower panel 22 in which upper and lower ends of the rear panel 20 are folded back, and side surfaces thereof. It is composed of left and right side panels 23, 24, etc.

As shown in FIGS. 5 to 7, the rear panel 20 is provided with a horizontal single groove 20a having a trapezoidal cross-section by being bent toward the front side in the vicinity of the upper and lower centers. The concave groove 20a has a function of improving the bending rigidity of the entire back panel 20 and the soundproof panel 1.

As shown in FIG. 5, each of the upper surface panel 21 and the lower surface panel 22 has an inclined surface that is gradually inclined from the rear end side connected to the rear panel 20 and has a substantially higher inclined front surface, Folded portions 21a and 22a each having a vertical surface on the front side are formed. For this reason, the upper panel 21 of the lower soundproof panel 1 is configured to be fitted to the lower panel 22 of the upper soundproof panel 1, and the upper and lower soundproofing panels 21 and 22 are fitted together. The panels 1 are securely fitted to each other so as not to be displaced by wind pressure.

Although not shown, notches through which wires for preventing fall are inserted may be formed at both ends of the upper panel 21 and the lower panel 22, which are ends in the longitudinal direction.

The side panels 23, 24 are configured symmetrically, and have a U-shaped horizontal cross section to increase the rigidity of the longitudinal end portion of the soundproof panel 1. The front side folds are the front portions 23a, 24a, the back surface. The folded back side is the back surface portions 23b (not shown) and 24b. The front portions 23a and 24a have a function as a backing metal for the presser foot 5 described later (see FIG. 5).

Further, as shown in FIGS. 6 and 7, recesses 23c (not shown) and 24c, which are continuous with the recessed grooves 20a of the back panel 20 described above, are also formed in the back portions 23b (not shown) and 24b. There is.

(Sound absorbing material)
The sound absorbing material 3 is a sound absorbing material made of resin fiber or foamed resin, and the sound absorbing material 3 according to the present embodiment is a fiber material of polyester resin. Of course, the sound absorbing material according to the present invention may be a fiber material made of other synthetic resin, or a porous material such as foamed resin. In short, the sound absorbing material according to the present invention can be applied as long as it can absorb sound by converting sound energy into heat energy and attenuating noise in the sound absorbing material.

Further, conventionally, in order to obtain a sound absorbing effect with an inexpensive structure, a cavity is provided on the back surface of the sound absorbing material as described in Patent Documents 1 and 2. However, as shown in FIG. 2 and FIG. 5, the sound absorbing material 3 according to the present embodiment has the same main sound absorbing material as the conventional one, that is, a cushion cushion-shaped main sound absorbing material 30 having a rectangular shape in a front view, and a groove 20 a. An upper sound absorbing material 31 and a lower sound absorbing material 32 are also inserted as upper and lower sound absorbing materials on the upper and lower sides. Therefore, the soundproof panel 1 has improved sound absorption efficiency.

In particular, it can be said that the sound absorption effect of the back air layer is, as is known, that the sound absorption frequency band is shifted to the low frequency side to enhance the sound absorption effect in a relatively low frequency band of 1000 Hz or less. Therefore, instead of providing the rear air layer, by inserting the upper sound absorbing material 31 and the lower sound absorbing material 32, in the high frequency band of the soundproof panel 1, particularly, in the range of 1000 Hz to 2000 Hz which is the sound range of the voice of the child. The sound absorbing effect of can be improved.

(Face material)
The face material 4 according to the present embodiment is a non-woven fabric of a fiber material made of resin fibers such as polyester fibers. The reason that the face material 4 is the fiber material is that noise is transmitted to some extent through the gaps between the fibers of the fiber material and is absorbed by the above-mentioned sound absorbing material 3 on the back side far from the noise source.

Further, the face material 4 has a cushioning property that does not cause injury even when a person such as a child collides. It is considered that since the face material 4 has the cushioning property, the material is not too hard and does not reverberate the noise, which also contributes to the improvement of the sound absorption coefficient. As described above, the face material 4 according to the present embodiment is compression-molded to have a thickness of 3 mm to 8 mm by solidifying the polyester fiber in order to provide cushioning properties.

In this way, by keeping the thickness of the face material 4 according to the present embodiment within a certain range, the face material 4 maintains a predetermined shape without being too thin and not bent or wrinkled. be able to. Moreover, the face material 4 can be bent and formed into a predetermined shape without being too thick, and the panel can be fitted vertically.

Further, as shown in FIG. 5, the face member 4 has an upper end screwed to the inclined surface of the upper panel 21 with a screw V1 and a lower end screwed to the folded portion 22a of the lower panel 22 with a screw V1. Both left and right ends are fixed to the panel body 2 with screws via the presser foot 5, as will be described later.

Moreover, as shown in FIGS. 5 and 8, stepped folds 4a are formed in the vicinity of the upper end of the face material 4 in accordance with the fitting shape of the panel bodies 2, and in the vicinity of the lower end, the aforementioned folds 4a are formed. A folded-back portion 4b folded back 180 degrees is formed. FIG. 8 is a perspective view showing the face member 4 of the soundproof panel 1. As shown in FIG. 8, the folds 4a and the folded-back portions 4b are already formed when the nonwoven fabric is compression-molded. Therefore, even in the fitting portion between the soundproof panels 1, the face material 4 does not loosen, bend, or wrinkle. Therefore, even during the construction, there is no concern that the soundproof panels 1 are not fitted together properly, and the durability of the soundproof panel 1 is further improved.

(Presser hardware)
As shown in FIGS. 5 and 9, the presser foot 5 is made of a steel plate, and is composed of a strip-shaped plate-like presser foot body 50, a step portion 51 provided at the upper end, and the like. The step portion 51 is bent and formed in a step shape so as to be accommodated in the lower surface panel 22 which is a fitting portion of the upper soundproof panel 1. Further, in the presser foot body 50 and the step portion 51, a plurality of screw holes 5a for screwing with screws are formed in the front portions 23a, 24a of the side panels 23, 24 described above. FIG. 9 is a perspective view showing the presser foot 5 of the soundproof panel 1.

This presser foot 5 has a function of pressing the left and right ends of the face member 4 in the longitudinal direction from above to fix the side member 23 to the side panels 23 and 24 of the panel body 2. As shown in FIG. 3 and the like, this presser foot 5 is attached to a position where it is concealed by the columns which are the left and right ends. Therefore, as shown in FIG. 1, the sharp metal member is not exposed, and it is possible to reliably prevent the face material 4 from sagging, bending, or wrinkling. Therefore, not only does it look good, there is less risk of damage to the soundproof panel due to wind and rain, and durability is improved.

The fixing of the presser foot 5 to the panel body 2 is not limited to fixing with screws such as screws, but it goes without saying that it may be fixed with screws such as one-side bolts (fixing with screws) or rivets. Absent.

<Vertical incident sound absorption coefficient measurement test>
Next, the relationship between the basis weight of the face material of the soundproof panel and the sound absorption coefficient will be described with reference to FIG. FIG. 10 is a graph showing the results of the normal incidence sound absorption coefficient measurement test of the soundproof panel 1. This normal incidence sound absorption coefficient measurement test is based on JIS A 1405 standard, using an acoustic tube, variously changing the basis weight and thickness of the non-woven fabric of the face material 4 of the above-mentioned soundproof panel 1 to obtain the face material 4 and the sound absorption. The sound absorption coefficient when sound is perpendicularly incident on the material 3 (24K, 50 mm thickness) is measured at each frequency for every 1/3 octave.

As shown in FIG. 10, regardless of the thickness of the non-woven fabric, it can be understood that particularly the non-woven fabric having a basis weight of 610 g/m ² has excellent sound absorbing performance in a wide frequency band. Furthermore, this experiment was basis weight of 210g ^{/ m 2} ~720g ^/ m 2 nonwoven fabric, it can be seen that both have cleared the sound absorption coefficient 0.7 in 1000Hz~2000Hz a range of children's voices. Therefore, by setting the basis weight of the face plate 4 and ^{210g / m 2 ~720g / m 2} , the conventional frequency of 1000Hz~2000Hz that it corresponds to the child's voice is difficult not so much supposed to sound absorption It can be said that the noise in the belt can be reliably absorbed.

The reason why the sound absorption coefficient is 0.7 or more is that the sound insulation wall for road noise has a NEXCO sound insulation wall acoustic standard of sound absorption coefficient of 0.7 or more at 400 Hz and 0.8 or more at 1000 Hz. However, the NEXCO sound insulation wall acoustic standard is carried out by the reverberation room sound absorption coefficient measuring method (JIS A 1409), and is different from the sound absorption coefficient and impedance sound absorption coefficient measured by the above-mentioned JIS A 1405 standard acoustic tube. Generally, the sound absorption coefficient by the reverberation room method tends to be improved by about 0.1 to 0.2 from the sound absorption coefficient of the acoustic tube. Therefore, it is considered that a sufficient effect is exhibited when the measurement result by the acoustic tube is 0.7 or more at the target frequency of 1000 to 2000 Hz in consideration of the difference between the standard and the measurement method described above. Therefore, the sound absorption coefficient of 0.7 was used as one index.

<Effect of soundproof panel 1 and soundproof wall>
Conventionally, in order to avoid ultraviolet rays and wind and rain, the sound absorbing material has been covered and covered with a metal panel housing, the metal support frame or the middle crosspiece shown in Patent Document 2. However, according to the soundproof panel 1 and the soundproof wall described above, since the sound absorbing material 3 is covered with the face material 4 made of a non-woven fabric having a cushioning property, a person such as an infant or a child may come into contact with or collide with the sound absorbing material 3. Even if it does, there is very little risk of injury such as pinching a finger or a part of the body. Further, noise can be transmitted without being reflected by the face material 4 and can be reliably absorbed by the sound absorbing material 3.

Further, according to the soundproof panel 1 and the soundproof wall, since the face material 4 is fixed to the panel body 2 via the presser foot 5 at a position where it is concealed by the columns H1 which are the left and right ends, it is fixed. No sharp metal member is exposed. In addition, it is possible to reliably prevent the face material 4 from sagging, bending, or wrinkling. For this reason, according to the soundproof panel 1 and the soundproof wall, not only does it look good, but there is less risk of damage to the soundproof panel 1 due to wind and rain, and durability is improved.

Moreover, according to the soundproof panel 1 and the soundproof wall, since the folds are formed in the face material 4 according to the upper and lower fitting shapes of the panel body 2, the vicinity of the fitting portion between the panels of the soundproof panel 1 is formed. Also, the face material 4 does not sag, bend, or wrinkle. Therefore, even during construction, there is no fear that the panels of the soundproof panel 1 are not fitted properly, and the durability of the soundproof panel is further improved.

In addition to that, according to the soundproof panel 1 and the soundproof wall, the upper sound absorbing material 31 and the lower sound absorbing material 32, which are the sub sound absorbing materials, are inserted in the upper and lower voids of the concave groove 20a of the panel body 2. Therefore, not only the bending rigidity and durability of the soundproof panel 1 are improved by the groove 20a, but also the sound absorption coefficient is further improved by the upper sound absorbing material 31 and the lower sound absorbing material 32, and the diffusion of noise can be suppressed. In particular, instead of providing the conventional rear air layer, by inserting the upper sound absorbing material 31 and the lower sound absorbing material 32, the high frequency band of the soundproof panel 1, particularly 1000 Hz which is the sound range of infants and children. The sound absorption effect at up to 2000 Hz can be improved.

Although the soundproof panel 1 and the soundproof wall according to the embodiment of the present invention have been described above in detail, the above-described or illustrated embodiments are all examples of one embodiment embodied in carrying out the present invention. Not too much. Therefore, the technical scope of the present invention should not be limitedly interpreted by these. In particular, the description has been given by exemplifying a nonwoven fabric made of polyester fiber as the face material, but the face material according to the present invention is not limited to the nonwoven fabric, and any material having a cushioning property made of a fiber material can be substituted.

1: Soundproof panel 2: Panel body 20: Rear panel 21: Upper panel 22: Lower panel 21a, 22a: Folding part 23, 24: Side panel 23a, 24a: Front part (23b) 24b: Back part 3: Sound absorbing material 30 : Main sound absorbing material 31: Upper sound absorbing material 32: Lower sound absorbing material 4: Face material 4a: Fold 4b: Folding portion 5: Presser metal object 50: Presser metal object main body 51: Step part H1: Strut V1: Screw

Claims (5)

A soundproof panel that constructs a soundproof wall that may come in contact with people that absorbs noise from noise sources and suppresses noise diffusion.
A panel main body that is a metal housing whose front side that is the noise source side is open; and a sound absorbing material that is housed in the panel main body and absorbs noise,
The front surface of the panel body, the panel body is covered up to the upper and lower end portions of the front surface in a state where the sound absorbing material is accommodated by a surface material having a cushioning property made of a fiber material,
The soundproof panel, wherein the face member is fixed to the panel body via a strip-shaped presser metal member at a position where the face member is concealed by columns which are left and right ends. Basis weight of the surface material is soundproofing panel according to claim 1, characterized in that has a 210g / ^{m 2} or more 720 g / ^{m 2} or less. The soundproof panel according to claim 1 or 2, wherein a groove for improving bending rigidity is formed on the back surface of the panel body, and the sound absorbing material is also placed around the groove. .. It is a soundproof wall that may be touched by a person who has a plurality of columns and a soundproof panel that absorbs noise from a noise source and suppresses the diffusion of the noise between the plurality of columns and that is placed in multiple stages. hand,
The soundproof panel includes a panel main body that is a metal housing with a front surface that is a noise source side open, and a sound absorbing material that is housed in the panel main body and absorbs noise,
The front surface of the panel body, the panel body is covered up to the upper and lower end portions of the front surface in a state where the sound absorbing material is accommodated by a surface material having a cushioning property made of a fiber material,
The soundproof wall is characterized in that the face member is fixed to the panel body via a strip-shaped presser metal member at a position where it is concealed by columns which are left and right ends. The left and right end portions of the face member are screwed and fixed to the panel body via strip-shaped pressers, and the pressers are hidden by the columns. Soundproof wall.

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