JPH08177142A - Interior finishing sound absorbing body and interior finishing sound board using it - Google Patents

Abstract

PURPOSE: To enhance the degree of freedom in interior design without impairing the sound effect of the interior of a room. CONSTITUTION: Each sound absorbing body is provided with a space 5 at its back face side, a diffusing plate 2 in a slender shape having a projected surface and/or a recessed surface formed at its surface side, and with sound absorbing material 3 bonded to the back face of the diffusing plate 2, and a cut-out section 4 communicating the space 5 with the outside is formed in each diffusing plate 2. Besides, a great number of the interior sound absorbing bodies 1 formed as mentioned above are bonded onto a support board.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sound absorber for an interior, which is attached to a wall surface or a ceiling surface of an acoustic room or the like, and an interior acoustic plate using the same.

[0002]

2. Description of the Related Art In an acoustic room, in order to effectively utilize acoustic effects such as reverberation, and to eliminate acoustic obstacles such as reverberation (flutter echo), various interior acoustic plates are used as interior materials for walls and ceilings. In addition, it is common practice to incline or even form a wall surface or a ceiling surface made of an interior acoustic plate.

[0003]

In such a conventional acoustic room, the interior acoustic plate itself has a uniform design such as a perforated structure or a slit structure.
Even if a wall surface or a ceiling surface is formed to have irregularities by using this interior acoustic plate, the interior design will be standardized. That is, there is a problem that the interior effect is restricted because the acoustic effect is prioritized.

The present invention has been made to solve the above problems, and an interior sound absorber capable of increasing the degree of freedom in the interior design without impairing the acoustic effect in the interior and a sound absorber for the interior. The purpose is to provide a used interior acoustic plate.

[0005]

In order to achieve the above object, the interior sound absorber according to claim 1 has an elongated diffuser plate having a space on the back surface side and a convex surface and / or a concave surface on the front surface side, With a sound absorbing material attached to the back surface of the diffusion plate,
It is characterized in that the diffusion plate is formed with a cutout portion that communicates the outside with the space.

In this case, it is preferable that the diffusion plate has an arc-shaped or mountain-shaped cross section.

According to a fourth aspect of the present invention, there is provided an interior acoustic plate, wherein a large number of the above-mentioned interior sound absorbers are used, and the plurality of interior sound absorbers are attached to the surface of the support plate.

In this case, a large number of interior sound absorbers having the same sectional shape are arranged in a row in the X-axis direction along the surface of the support plate.
It is preferable that a large number of interior sound absorbers having different sizes are arranged in parallel in the Y-axis direction.

In this case, it is preferable that a large number of interior sound absorbers in the X-axis direction are arranged in a row with a gap therebetween.

According to a seventh aspect of the present invention, the interior acoustic plate has a large number of elongated diffusion plates having a space on the back side and convex and / or concave surfaces on the front side, and a large number of diffusion plates attached to the front side. A sound absorbing plate and a supporting plate for supporting the sound absorbing plate,
It is characterized in that each diffusion plate is formed with a cutout portion that communicates the outside with the space.

According to the eighth aspect of the present invention, the interior acoustic plate has a large number of elongated diffusion plates having a space on the back side and convex and / or concave surfaces on the front side, and a large number of diffusion plates attached to the front side. The present invention is characterized in that a support plate and a sound absorbing material attached to the support plate so as to be concealed by the respective diffusion plates are provided, and each of the diffusion plates is formed with a cutout portion that communicates the outside with a space.

According to a ninth aspect of the present invention, there is provided an interior acoustic plate having a plurality of elongated diffusion plates having a space on the back side and having a convex surface and / or a concave surface on the front side, and a support plate to which the plurality of diffusion plates are attached. And are provided.

[0013]

According to the interior sound absorber of the present invention, the sound traveling toward the wall surface in the room is reflected by the surface of the elongated diffusion plate having the convex surface and / or the concave surface while being diffusely reflected. The sound that has entered the space on the side is absorbed by the resonance-type sound absorbing body formed of the space and the cutout portion by the diffusion plate, and at the same time, is absorbed by the sound absorbing material attached to the back surface of the diffusion plate. Therefore, most of the sound reaching the interior sound absorber is absorbed by the sound absorber and diffused diffusely into the room. In this case, since the sound absorption frequency changes depending on the cross-sectional area, length, and shape of the cutout portion of the diffuser plate, the sound absorption characteristics can be controlled appropriately, and the shape of the convex or concave surface of the diffuser plate and the size of the diffuser plate can be adjusted. Thus, the diffusion characteristics can be controlled appropriately. Therefore, it is possible to construct a room having desired acoustic characteristics by mounting a large number of interior sound absorbers on the wall surface, and to construct a good interior design by the shape, size, and mounting pattern of the interior sound absorber. You can

According to the interior sound absorbers of the second and third aspects, the interior sound absorber itself can be easily manufactured because the sectional shape of the diffuser plate is an arc shape or a mountain shape. The wall surface can be hard or soft and can be finished freely.

According to the fourth aspect of the present invention, since a large number of the above-mentioned sound absorbers for the interior are attached to the surface of the support plate, the whole interior acoustic plate can be manufactured as a unit at the factory. This facilitates construction and facilitates acoustic design.

According to the fifth aspect of the present invention, the interior acoustic absorbers having the same cross-sectional shape are arranged in a row in the X-axis direction on the surface of the support plate, and the interiors having different sizes in the Y-axis direction. By arranging the sound absorbers for use in parallel, the diffusion of sound can be further promoted, and a good design that is uniform in design can be obtained.

According to the sixth aspect of the present invention, since the internal sound absorbers in the X-axis direction are arranged in a row with a gap between each other, this portion serves as a slit type resonance sound absorbing structure. The input sound can be further attenuated.

According to the interior acoustic plate of claims 7 and 8, unlike the interior acoustic plate, since the sound absorbing plate or the sound absorbing material is provided on the support plate side, the sound absorbing performance and the diffusion performance are improved. It can be manufactured very easily without damage.

According to the ninth aspect of the present invention, the interior acoustic plate has a structure in which a large number of diffusion plates are simply attached to the supporting plate. Therefore, it is possible to overcome the acoustic obstacles only by diffusing the sound without requiring sound absorption. In such a case, a desired acoustic effect can be obtained at low cost without impairing the design.

[0020]

Embodiments of the sound absorber for interior and the acoustic plate for interior according to the present invention will be described in detail below with reference to the accompanying drawings. FIG. 1 is a perspective view of an interior sound absorber according to the first embodiment. As shown in FIG.
The diffusion plate 2 is formed in a semi-cylindrical shape, and the sound absorbing material 3 is attached to the back surface of the diffusion plate 2. The diffusion plate 2 has an arc-shaped cross section obtained by dividing a cylinder in half and is formed in a short length. Both edges of the diffusion plate 2 are open, and a pair of notches 4 and 4 are formed on both sides of the diffusion plate 2.
Each notch 4 works together with the cylindrical diffusion plate 2 as a so-called resonance type sound absorber, and attenuates the sound that has penetrated from the notch 4 to the back surface side of the diffusion plate 2.

The sound absorbing material 3 is made of a porous sound absorbing material such as glass wool, rock wool and urethane foam, and is attached to the back surface of the diffusion plate 2 in an arc shape. In this case, a space 5 is formed on the back surface side of the diffusion plate 2 attached to the wall surface.
It is designed to fit in. A part of the sound absorbing material 3 is exposed to the outside through a pair of notches 4 and 4 formed in the diffusion plate 2. The sound that has entered through the notches 4 is the sound absorbing material 3
Is absorbed in the process of transmitting the light and is absorbed while the reflection is repeated in the space 5.

FIG. 2 shows a construction state of the interior sound absorber 1 configured as described above. As shown in the figure,
A large number of three types of middle and small interior sound absorbers 1a, 1b, 1c are attached to the wall surface W in consideration of the interior design. In this case, the same kind of interior sound absorbers 1 are arranged in a row in the left-right direction (X-axis direction) with a predetermined gap, and three types of interior sound absorbers 1a are arranged in the vertical direction (Y-axis direction). , 1b,
1c are juxtaposed with a predetermined gap. The interior sound absorbers 1 in the figure are formed to have the same length regardless of size, but the lengths may be different depending on the design or acoustic needs. Also, the interior sound absorber 1
Large and small types are also decided with priority given to the interior design.

FIG. 3 is a perspective view of an interior sound absorber according to the second embodiment. As shown in the same figure, this interior sound absorber 1
1, the basic structure including the diffusion plate 12 and the sound absorbing material 13 is the same as that of the first embodiment, but the diffusion plate 12 has a mountain-shaped cross section. Then, similarly to the first embodiment, the diffusion plate 1
Both of the two small openings are open, and a pair of notches 14 and 14 are formed on both sides of the diffusion plate 12.

As described above, according to the interior sound absorbers 1 and 11 of both the first and second embodiments, the sound hitting the arc-shaped or mountain-shaped surfaces of the diffusion plates 2 and 12 depends on these shapes. ,
It is diffusely reflected without being reflected in the same direction. On the other hand, the sound that has entered the space 5 on the back surface side from the cutouts 4 and 14 of the diffusion plate is attenuated by the resonance type sound absorbing structure composed of the diffusion plates 2 and 12 and the cutouts 4 and 14, and at the same time, the sound absorbing materials 3 and 13.
Is attenuated by. Therefore, by using a large number of interior sound absorbers 1 and 11 to form the interior finish surface of the wall or ceiling, acoustic interference such as flutter echo can be effectively prevented. Further, the sound absorption characteristics and the diffusion characteristics change depending on the cross-sectional shape, size, length, notch shape, etc. of the interior sound absorbers 1 and 11, and the diffusion plates 2 and 12, so that acoustic control is easily performed. be able to.

On the other hand, the shapes of the interior sound absorbers 1 and 11 themselves,
Since the size and the mounting pattern act as design elements of the interior, the wall surface W can be finished in a good interior design by appropriately combining and matching these elements. That is, the degree of freedom in interior design can be increased without impairing the desired acoustic effect. The shapes of the interior sound absorbers used in the above-described examples and the following examples are not limited to the arc-shaped cross section and the mountain-shaped cross section, and may be house-shaped or other convex or “M” -shaped or other concave. Further, it may be a combination of these.

FIG. 4 is a partial perspective view of an interior acoustic board constructed by using a large number of interior sound absorbers of the first embodiment.
As shown in the figure, the interior acoustic plate 21 is composed of the support plate 2
A large number of interior sound absorbers 1 are attached to the surface of 2 in the same arrangement as in FIG. 2, and the overall size is 900 mm × 1800 mm.
Is formed to a standard size. In this case, the support plate 22 is preferably made of wood plywood or the like.

FIG. 5 is a partial perspective view of a second embodiment of the interior acoustic plate. As shown in the figure, this interior acoustic plate 3
Reference numeral 1 denotes an interior sound absorber 1 made of bamboo, which is stretched on the surface of a support plate 32. In the first stage, a plurality of large-diameter interior sound absorbers 1a, in which a half-divided bamboo material is used as a diffusion plate 2 and a sound absorbing material 3 is adhered inside, are arranged in a row, and in the second stage, it is similarly formed. A plurality of small-diameter interior sound absorbers 1b are arranged in a row, a split bamboo piece 33 obtained by subdividing a bamboo material is extended in the third step, and a thin round bamboo 34 is extended in the fourth step. There is. Furthermore, in the fifth stage, the same split bamboo piece 33 as in the third stage, in the sixth stage there is an internal sound absorber 1b having the same large diameter as in the first stage and a little shorter, and in the seventh stage, two. An interior sound absorber 1a having the same small diameter as the stage and slightly shorter, and a circular bamboo 34 identical to the fourth stage are provided at the eighth stage (the subsequent stages are not shown).

As described above, according to the interior acoustic plates 21 and 31 of both the first and second embodiments, the entire interior acoustic plates 21 and 31 can be manufactured as a unit in the factory, and the interior acoustic plates can be manufactured on site. It is not necessary to attach the sound absorbers 1 to the wall surface W one by one. Therefore, the construction can be easily performed in a short period, and the acoustic design can be easily performed in units of the interior acoustic plates 21 and 31.

Further, by arranging the interior sound absorbers 1 in a row in the left-right direction with a gap therebetween, it is possible to form a slit-type resonance sound absorbing structure, and large and small interior sound absorbers 1a, 1b.
By arranging in parallel, it is possible to promote sound diffusion. That is, since the acoustic characteristics of the interior acoustic plates 21 and 31 themselves and the size and arrangement of the interior acoustic absorbers 1 can be changed, the acoustic performance can be freely adjusted and the design can be freely performed. You can increase the degree. In addition, the interior acoustic boards 21 and 31 of both examples.
Then, although the interior sound absorber 1 according to the first embodiment is used in large numbers, the interior sound absorber 11 according to the second embodiment may be used, or these may be mixed and used.

FIG. 6 is a sectional view of a third embodiment of the interior acoustic plate. In the interior acoustic plate 41 shown in FIG. 6A, the sound absorbing plate 43 is attached to the entire surface of the support plate 42, and the diffusion plate 2 is attached to the surface of the sound absorbing plate 43. On the other hand, in the interior acoustic plate 51 shown in FIG.
A diffuser plate 2 is attached to the surface of 2, and a finely chopped sound absorbing material 53 is attached so as to be hidden by the diffuser plate 2.

According to the third embodiment, the sound absorbing plate 43 and the sound absorbing material 53 are not located on the diffusion plate 2 side, but on the supporting plates 42 and 52.
Since it is attached to the side, manufacturing becomes easier. If sound absorption is not necessary, the sound absorbing material may be omitted and the interior acoustic plate may be configured by using a diffuser plate having no cutout portion.

[0032]

As described above, according to the sound absorber for interior of the present invention, the sound absorption characteristics and the diffusion characteristics can be freely controlled. Therefore, by using this as an interior material, acoustic effects such as reverberation can be effectively achieved. Not only can it be used, but it can also prevent acoustic obstacles such as flutter echoes, and the degree of freedom in the interior design can be increased without being caught by acoustic effects.

According to the interior acoustic plate of claim 4,
It can be installed easily without compromising the acoustic effect and the flexibility of interior design.

Furthermore, the interior acoustic plate according to the seventh and eighth aspects can be easily manufactured without impairing the degree of freedom in the acoustic effect and the interior design.

Furthermore, according to the interior acoustic plate of claim 9, in a state where a predetermined acoustic effect and design are maintained,
It can be manufactured at low cost.

[Brief description of drawings]

FIG. 1 is an external perspective view of an interior sound absorber according to a first embodiment of the present invention.

FIG. 2 is a perspective view showing a construction state of the interior sound absorbing body according to the first embodiment.

FIG. 3 is an external perspective view of an interior sound absorber according to a second embodiment.

FIG. 4 is a partial external perspective view of the interior acoustic plate according to the first embodiment.

FIG. 5 is a partial external perspective view of an interior acoustic plate according to a second embodiment.

FIG. 6 is a partial sectional view of an interior acoustic plate according to a third embodiment.

[Explanation of symbols]

 1 Interior Sound Absorber 2 Diffusion Plate 3 Sound Absorbing Material 4 Notch 5 Space 21 Interior Acoustic Plate 22 Support Plate W Wall

Claims (9)

[Claims] 1. An elongated diffusion plate having a space on the back surface side and having a convex surface and / or a concave surface on the front surface side,
A sound absorber for internal use, comprising: a sound absorbing material attached to a back surface of the diffusion plate, wherein the diffusion plate is formed with a cutout portion that communicates the outside with the space. 2. The sound absorber for interior according to claim 1, wherein the diffusion plate has an arc-shaped cross section. 3. The sound absorber for interior according to claim 1, wherein the diffuser plate has a mountain-shaped cross section. 4. The interior sound absorber according to claim 1, 2 or 3, wherein a large number of the interior sound absorbers are used, and the plurality of interior sound absorbers are attached to a surface of a support plate. Acoustic plate. 5. A plurality of the interior sound absorbers having the same cross-sectional shape are arranged in a row in the X-axis direction along the surface of the support plate, and a large number of the interior sound absorbers having different sizes in the Y-axis direction. The acoustic plate for interior according to claim 4, wherein sound absorbers are arranged in parallel. 6. A number of interior sound absorbers in the X-axis direction,
The interior acoustic plate according to claim 5, wherein the acoustic plates are arranged in a row with a gap therebetween. 7. A large number of elongated diffusion plates having a space on the back surface side and convex and / or concave surfaces on the front surface side, a sound absorbing plate having the plurality of diffusion plates attached to the front surface, and the sound absorbing plate. An acoustic plate for interior, comprising: a support plate that supports the space, and a notch that communicates the outside with the space is formed in each of the diffusion plates. 8. A large number of elongated diffusion plates having a space on the back surface side and having convex and / or concave surfaces on the front surface side, a support plate having the plurality of diffusion plates attached to the front surface, and the support plate. And a sound absorbing material attached so as to be concealed by each diffusion plate, and a cutout portion that communicates the outside with the space is formed in each diffusion plate. 9. A plurality of elongated diffusion plates each having a space on the back surface side and having a convex surface and / or a concave surface on the front surface side, and a support plate to which the plurality of diffusion plates are attached are provided. Characteristic acoustic board for interior.