JP2004339830A - Construction method for acoustic room, and diffusion panel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a construction method for an acoustic room, which can simply bring about desired acoustic characteristics. <P>SOLUTION: After the diffusion panel 10 is arranged in such a manner as to cover the whole of a sound insulation layer 51 for covering a wall surface 50 of the acoustic room 40, a sound absorbing panel 20 is temporarily fixed to a surface of the diffusion panel 10. An audition is performed in this state, and an installation condition of the panel 20 is changed when the desired acoustic characteristics are not obtained. When the desired acoustic characteristics are obtained, the panel 20 is permanently fixed to a position to be installed, and a transmission panel 30 is arranged in a position to nonoverlap the panel 20. Thus, the desired acoustic characteristics can be obtained without changing an installation condition of the diffusion panel 10. Furthermore, a sense of discomfort in terms of a design can also be eliminated by the transmission panel 30. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a method for constructing an acoustic room capable of obtaining desired acoustic characteristics, and a diffusion panel having a sound diffusibility that can be used in the method.
[0002]
[Prior art]
In a closed space separated by walls, sound emitted from a sound source may be repeatedly reflected between opposing walls, resulting in acoustic disturbance. However, in a sound room such as a concert hall, a musical instrument practice room, or a home theater, it is not preferable that such an acoustic disturbance occurs. Therefore, a process for suppressing repetitive reflection is performed on these indoor walls.
[0003]
As an example of a process for suppressing the acoustic disturbance, there is a process of providing a diffusion surface for diffusing sound and a sound absorbing surface for absorbing sound on a wall surface. Here, flutter echo, which is one of the acoustic obstacles, is likely to occur when opposing wall surfaces are parallel. Therefore, in this processing, a diffusion surface having a curved surface or a plurality of quadrangular pyramids is provided on the wall surface, and the sound incident on the wall surface is diffused.
Conventionally, when constructing an acoustic room, the shape and arrangement of the diffusing surface and the sound absorbing surface are determined by using computer simulation or the like so that desired acoustic characteristics can be obtained. The surface had been attached to the wall. For convenience, this technique will be referred to as a first conventional technique.
[0004]
The above-mentioned diffusion surface and sound absorption surface may be respectively formed as panels. These panelized diffusion surfaces (hereinafter referred to as “diffusion panels”) and panelized sound absorption surfaces (hereinafter referred to as “sound absorption panels”) are also appropriately arranged on the wall surface of the acoustic room, so that the acoustic room has a desired sound. Properties can be given. This technique will be referred to as a second conventional technique. The second conventional technique is disclosed in, for example, Patent Document 1.
[0005]
[Patent Document 1]
JP-A-6-158750
[0006]
[Problems to be solved by the invention]
By the way, the prediction accuracy when predicting the acoustic characteristics of an acoustic room has a close relationship with the size of the acoustic room. For example, in a relatively large-scale acoustic space such as a concert hall, the prediction result of the acoustic characteristics by the above-described computer or the like substantially matches the actual acoustic characteristics. Therefore, a desired acoustic characteristic can be obtained by arranging the diffusing surface and the sound absorbing surface as designed. However, in a relatively small-sized sound room such as a musical instrument room or a home theater, for example, it is not uncommon for the result of the prediction to be largely different from the actual sound characteristics. This is because the direct sound and the reflected sound are likely to interfere with each other because the sound source is close to the wall surface. Therefore, in such a small-sized acoustic room, it is necessary to confirm actual acoustic characteristics by conducting a trial listening after the construction, and to arrange the diffusing surface and the sound absorbing surface depending on the result.
[0007]
In response to such a demand, in the first prior art, after the construction, the diffusing surface and the sound absorbing surface are fixed to the wall surface, so that it takes enormous effort to change the arrangement. In the worst case, it is necessary to temporarily remove all the diffusing surface and the sound absorbing surface and reconstruct the acoustic room, which is extremely inefficient.
In the second prior art, since the diffusion surface is unitized as a diffusion panel and the sound absorbing surface is unitized as a sound absorbing panel, if these panels are temporarily fixed to the wall surface, for example, after listening to a certain diffusion panel, It is also possible to adjust the arrangement, such as exchanging a sound absorbing panel. However, this second technique is not economical because replacement panels must be provided for both the diffusion panel and the sound absorbing panel.
The present invention has been made in view of the above circumstances, and has as its object to provide a method for constructing an acoustic room that can easily and economically achieve desired acoustic characteristics.
[0008]
[Means for Solving the Problems]
In order to solve the above problems, a method for constructing an acoustic room according to the present invention comprises the steps of: disposing a plurality of diffusion panels having a sound diffusing property on a wall surface of an acoustic room; A step of temporarily fastening each of the diffusion panels so as to straddle a plurality of adjacent diffusion panels that are part of the plurality of diffusion panels; and A step of confirming whether or not acoustic characteristics can be obtained; a step of changing installation conditions of the sound absorbing panel to obtain the desired acoustic characteristics based on a result of the confirming step; And a fastening step.
According to such a construction method, since the sound absorbing panel is fixed to the diffusion panel so as to straddle a plurality of diffusion panels, the installation position of the diffusion panel can be fixed, and when adjusting the arrangement after the listening, There is no need to prepare a spare diffusion panel. Since this adjustment need only be performed for the sound absorbing panel, it is possible to obtain a desired acoustic characteristic very efficiently and easily.
That is, in the present invention, instead of changing the installation conditions of the diffusion panel and the sound absorbing panel, respectively, the installation conditions of the diffusion panel are changed by changing the installation conditions of the sound absorption panel.
[0009]
In a preferred aspect, the diffusion panel covers the entire area of the wall surface. With such a configuration, indoor sound diffusion is improved, and desired acoustic characteristics are easily obtained.
In a preferred aspect, the wall has sound insulation. With this configuration, the sound generated in the acoustic room is prevented from leaking to the outside.
In a preferred embodiment, a sound insulation layer is provided between the wall surface and the diffusion panel. With such a configuration, even if the wall surface itself does not have sound insulation, the sound generated in the acoustic room is prevented from leaking to the outside.
In a preferred embodiment, the diffusion panel has sound insulation. With this configuration, even if there is no wall surface having sound insulation properties or a diffusion panel having sound insulation properties, the sound generated in the acoustic room is prevented from leaking to the outside.
In a preferred aspect, a transmission panel having sound transparency straddles a plurality of adjacent diffusion panels that are a part of the plurality of diffusion panels, and does not overlap with the sound absorbing panel. Installed. With such a configuration, it is possible to obtain an acoustic room that is less unnatural in design.
Further, in a preferred aspect, the transmission panel is obtained by removing a sound absorbing material from the sound absorbing panel. With this configuration, it is difficult to distinguish the sound-absorbing panel from the transmissive panel in appearance, and a sense of strangeness in design is eliminated. Further, the transmission panel and the sound absorbing panel can be shared.
[0010]
In a preferred aspect, the diffusion panel has a curved portion on a surface, and the sound absorbing panel is attached to each curved portion of two adjacent diffusion panels.
According to such a configuration, good acoustic characteristics can be easily obtained.
In a preferred aspect, a plurality of sizes are prepared for the sound absorbing panel, and a desired distance from the wall is selected by selecting a size of the sound absorbing panel to be attached to each curved portion of the two adjacent diffusion panels. The sound-absorbing panel is fixed at a position separated only by the sound-absorbing panel.
According to such a configuration, good acoustic characteristics can be easily obtained.
[0011]
Further, the diffusion panel according to the present invention is attached to a wall surface of a room, and in a diffusion panel for diffusing sound generated in the room, the surface protrudes so as to form a curved surface that is curved in a circular or elliptical shape. And a plurality of holding portions for detachably holding the sound absorbing panel at a plurality of positions on the curved surface at different distances from the wall when attached to the wall.
According to such a diffusion panel, the sound absorbing panel can be securely attached to an accurate position by the holding portion.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
<First embodiment>
Hereinafter, the construction method of the acoustic room according to the first embodiment of the present invention will be described with reference to the drawings.
[0013]
<Description of acoustic panel>
In the present embodiment, the acoustic panel refers to a diffusion panel, a sound absorbing panel, and a transmission panel. FIG. 1 is a diagram showing a structure of an acoustic panel used in the present embodiment.
The diffusion panel 10 shown in FIG. 1 is a resin molded panel. A circular or elliptical curved surface 10a is formed on the surface of the diffusion panel 10, and scatters sound waves reaching the surface in all directions. On both sides of the curved surface 10a, elongated strip-shaped flat surfaces 10b are formed. In addition, four sides surrounding the diffusion panel 10 are subjected to chamfering, joint processing, and the like.
The sound absorbing panel 20 shown in FIG. 2 has a rectangular parallelepiped frame member 21 in which a sound absorbing member 23 is stored. Of the two planes surrounded by the four side surfaces of the frame member 21, a surface protection member 22 such as a cloth having sound transparency is provided on a surface which is to be the surface of the sound absorbing panel 20. The sound incident toward the surface of the sound absorbing panel 20 reaches the sound absorbing material 23 via the surface protecting material 22 and is absorbed by the sound absorbing material 23.
FIG. 3 shows the transmission panel 30. The transmissive panel 30 includes a rectangular parallelepiped frame member 31 and one of two planes covered with a surface protective material 32 such as a sound-permeable cloth. That is, the transmission panel 30 is obtained by removing the sound absorbing material 23 from the sound absorbing panel 20.
The material constituting the frame material 21 and the frame material 31 is mainly resin, wood, metal, or the like, but other various materials can be used as long as the effects such as the sound absorption described above are not impaired.
[0014]
<Explanation of construction method>
FIG. 4 is an exploded perspective view showing a part of a wall surface of the acoustic room 40 according to the present embodiment. The construction method of the acoustic room 40 according to the present embodiment will be described with reference to FIG.
The acoustic room 40 is configured by appropriately disposing the above-mentioned acoustic panel on the wall surface 50. Further, in order to prevent the sound in the acoustic room 40 from leaking out of the room, the entire surface of the wall surface 50 is covered with a sound insulation layer 51, unlike the wall surface of a general room.
[0015]
First, as a first step, a plurality of diffusion panels 10 are attached to the sound insulation layer 51. These diffusion panels 10 are arranged so as to cover the entire sound insulation layer 51 without gaps with the respective curved surfaces 10a facing the indoor side. Here, each diffusion panel 10 is fixed to a wall surface by applying a fixing material or the like for interior work on the back surface and bonding the back surface to the sound insulation layer 51. As described above, the four side surfaces of each diffusion panel 10 are subjected to chamfering, joint processing, and the like. Thereby, the contact between adjacent diffusion panels is enhanced.
[0016]
Next, as a second step, the sound absorbing panel 20 is temporarily fixed to the curved surface 10a of the diffusion panel 10. FIG. 5 is a diagram of the diffusion panel 10 and the sound absorbing panel 20 arranged on the indoor wall when viewed from the ceiling side. The left and right two sides of the four sides of the upper, lower, left and right sides of the sound absorbing panel 20 are detachably fixed to the respective curved surfaces 10a of the two diffusion panels 10 by, for example, a Velcro.
When the sound absorbing panel 20 is temporarily fixed in this way, a back air layer 24 surrounded by the sound absorbing panel 20, the flat surface 10b, and the curved surface 10a is formed. The back air layer 24 can absorb low frequency sound as the thickness thereof, that is, the distance from the plane 10b of the diffusion panel 10 to the sound absorbing material 23 of the sound absorbing panel 20 increases. Further, since the sound absorbing panel 20 is attached so as to be sandwiched between the two curved surfaces 10a, the thickness of the back air layer 24 varies depending on the size of the sound absorbing panel 20. Therefore, in the present embodiment, five types of sound absorbing panels 20 having different sizes are prepared so that the thickness of the back air layer 24 can be selected from 50, 100, 150, 200, and 250 (all units are millimeters). Have been. The thickness of the back air layer 24 is determined in advance as a design value by reverberation time calculation such as computer simulation.
[0017]
Next, as a third step, in the acoustic room 40 after the sound-absorbing panel 20 has been temporarily fixed, a trial listening assuming an actual use situation is performed. In this audition, if it is determined that desired acoustic characteristics have not been obtained, the following fourth step is performed.
[0018]
In the fourth step, the installation conditions of the sound absorbing panel 20 are changed. The installation conditions include the installation position, quantity, size, and the like of the sound absorbing panel 20. Specifically, in the fourth step, the following is performed.
a. A desired one of the temporarily fixed sound absorbing panels 20 is removed.
b. A new additional sound absorbing panel 20 is temporarily fixed at a desired position.
c. A desired one of the temporarily fixed sound absorbing panels 20 is replaced with another sound absorbing panel 20 having a different size.
The trial listening and the change of the installation condition of the sound absorbing panel 20 in the fourth step are repeated until a desired acoustic characteristic is obtained. In the fourth step, no change is made to the diffusion panel 10. Also, a plurality of types of sound absorbing panels 20 are prepared assuming a plurality of types of back air layers 24 to be realized. Furthermore, the sound absorbing panel 20 is only temporarily fixed to the diffusion panel 10. For this reason, this fourth step is performed extremely simply and with a high degree of freedom.
[0019]
When the desired acoustic characteristics are obtained in the fourth step, the final fastening of the sound absorbing panel 20 is performed as a fifth step. At this time, the sound absorbing panel 20 is fixed to the wall surface by applying a fixing material or the like for interior work on the side surface of the frame material 21 and bonding the fixing material to the curved surface 10 a of the diffusion panel 10. In this state, the acoustic room 40 can realize desired acoustic characteristics.
FIG. 6 is a front view of a part of the wall surface of the acoustic room 40 after the sound absorbing panel 20 is permanently fixed. The acoustic chamber 40 has a shape in which the sound absorbing panel 20 is disposed everywhere on the diffusion panel 10 that covers the entire sound insulating layer 51. However, in this state, a sense of discomfort in the design remains. In the present embodiment, by disposing the transmissive panel 30, the sense of incongruity in the design is solved. A plurality of types of transmission panels 30 having the same size and outer shape as the sound absorbing panel 20 are prepared. Hereinafter, a process of disposing the transmission panel 30 will be described as a sixth process.
[0020]
The transmission panel 30 is fixed to the diffusion panel 10 by an interior fixing material applied to the side surface of the frame member 31 so as to straddle the two diffusion panels similarly to the sound absorbing panel 20. In this case, the transmission panel 30 having the same size as the adjacent sound absorbing panel 20 is selected. By doing so, when focusing on the surface protection material 32 of the transmission panel 30 and the surface protection material 22 of the adjacent sound absorbing panel 20, the distance between the two from the plane 10b of the diffusion panel 10 is equal.
When the sixth step is completed, the wall surface of the acoustic chamber 40 appears to be covered by the sound absorbing panel 20 or the transmission panel 30 except for a part of the curved surface 10a of the diffusion panel 10 being exposed. Further, since the transmission panel 30 is obtained by removing the sound absorbing material 23 from the sound absorbing panel 20 as described above, there is no difference in appearance between the sound absorbing panel 20 and the transmission panel 30. Therefore, in addition to being extremely economical, it looks as if the panels of the same pattern are arranged on the left and right sides of the exposed surface of the diffusion panel 10, and the sense of discomfort in the design is eliminated. FIG. 7 shows a part of the wall surface of the acoustic room 40 in which the transmission panel 30 is provided in this manner.
As described above, according to the construction method according to the present embodiment, it is possible to extremely simply and economically obtain an acoustic room that not only has desired acoustic characteristics but also has a beautiful design.
[0021]
<Second embodiment>
The acoustic room 40 according to the above-described first embodiment has the sound insulation layer 51 between the diffusion panel 10 and the wall surface 50. However, adding sound insulation to the diffusion panel 10 may make the sound insulation layer 51 unnecessary. A description will be given of an acoustic room 60 according to the second embodiment in which the sound insulating layer is not required.
[0022]
The construction method of the acoustic room 60 is the same as that of the above-described first embodiment, and the description is omitted. FIG. 8 is a cross-sectional view of the wall surface of the acoustic room 60 as viewed from the ceiling side of the acoustic room 60. The same parts as those in the first embodiment are denoted by the same reference numerals, and the description is omitted. The diffusion panel 61 is provided so as to cover the entire area of the wall surface 50. As shown in the figure, the diffusion panel 61 includes a sound insulation layer 62 therein, and has a feature that, besides not only scattering the sound due to the curved shape of the surface, but also not leaking the sound to the outside. . In addition, the joint portions 61a of the diffusion panels 61 are sufficiently jointed, and attention is paid so that the sound generated in the room does not leak from the joint portions toward the wall surface. Therefore, unlike the first embodiment, the sound insulation layer 51 that covers the wall surface 50 is not required, and the construction cost is suppressed.
[0023]
<Third embodiment>
In the above-described embodiment, the case where the acoustic room is constructed by the interior construction has been described. Generally, such works are large-scale for individuals to perform. However, if an individual can build a home theater or the like at home, the demand is immense. Here, as a third embodiment of the present invention, a description will be given of a method of constructing an acoustic room suitable for individual construction in a general home.
[0024]
FIG. 9 is a perspective view of a part of a wall surface of an acoustic room 70 according to a third embodiment of the present invention. Portions that are the same as those in the first embodiment are given the same reference numerals, and descriptions thereof are omitted.
The rail 71 is a rail-shaped member provided in a portion close to the ceiling of the wall surface and extending in the horizontal direction. A plurality of hooks 72 are provided on the rail 71 so as to be slidable in the direction in which the rail 71 extends.
The sound insulation sheet 75 is a sheet having a role similar to that of the sound insulation layer 51 in the first embodiment, and has a plurality of rings 73 provided thereon so as to be hooked on hooks 72 fitted on rails 71. I have. Further, on the surface of the sound insulation sheet 75, a plurality of pairs of guide rails 74 that hold the diffusion panel 10 from both left and right sides and accommodate both sides of the diffusion panel 10 extend vertically.
[0025]
The diffusion panel 10 is disposed so as to cover the entire area of the sound insulation sheet 73 by sliding its side portion between the pair of guide rails 74 (only one diffusion panel is shown in FIG. 9). Has been). After the disposition of the diffusion panel 10 is completed, the sound absorbing panel 20 and the transmission panel 30 (both not shown) are appropriately disposed while repeating the listening, similarly to the above-described embodiment. According to such a construction method, an acoustic room can be constructed extremely easily in ordinary households. If the rails 71 and the hooks 72 can use existing members such as curtain rails in a room, an acoustic room can be more easily constructed.
[0026]
Further, in the acoustic room construction method according to the present invention, the temporary fixing step and the final fixing step of the sound absorbing panel may be performed using the same fixing means. For example, the same fixing means such as a magic tape, an industrial fastener, and a double-sided tape can be used as long as the fixing means is relatively freely detachable. Even if such fixing means are unified, the effects according to the present invention are not impaired. Further, unifying the fixing means in this way further reduces the construction cost.
[0027]
Further, the surface shape of the diffusion panel is not limited to the above-described curved surface. For example, a quadrangular pyramid may be formed. FIG. 10 illustrates a diffusion panel having a square pyramid formed on the surface.
In the above-described embodiment, the transmissive panel 30 is installed in order to eliminate a sense of incongruity in the design. However, the transmissive panel 30 does not affect the acoustic characteristics. You can enjoy the effect. Also, in the case of providing a transmissive panel, the design does not necessarily have to be the same as the sound absorbing panel, and any alternative can be used as long as it can impart a sense of design uniformity to the acoustic room after construction.
[0028]
<Fourth embodiment>
In the first embodiment, a plurality of types of sound-absorbing panels having different sizes are prepared so that a desired one can be selected from a plurality of thicknesses as the thickness of the back air layer. In the present embodiment, in order to facilitate the work of selecting the desired sound absorbing panel and fixing it to the diffusion panel, the sound absorbing panel (transmission panel) is temporarily fixed and fixed to the diffusion surface (curved surface) of the diffusion panel. Are provided in advance. In addition, a plurality of the holding means are provided on one diffusion surface according to the thicknesses of the plurality of types of back air layers that can be secured.
[0029]
FIG. 11 is a perspective view of a diffusion panel 100 according to a fourth embodiment of the present invention and a sound absorbing panel 110 attached to the diffusion panel 100. The diffusion panel 100 is functionally equivalent to the diffusion panel used in the above-described embodiment, but differs in that a holding portion including a screw and a screw hole for attaching the sound absorbing panel is provided. ing. In FIG. 11, only the frame member is shown for the sound absorbing panel 110 for easy understanding of the description.
[0030]
In FIG. 11, a pair of upper and lower screw holes 101 are provided at a plurality of positions on the diffusion surface of the diffusion panel 100 at different distances from the rear surface (the surface on the side fixed to the wall). And extends in a direction parallel to. 11, a marker 102 indicating the position of the screw hole 101 is provided on the upper surface of the diffusion panel 100.
A pair of upper and lower screw holes 12 penetrating the frame member 111 constituting the sound absorbing panel 110 is provided on the side of the frame member 111, and the distance between each pair of screw holes is two screws in the diffusion panel 100. It is equal to the distance between the holes 101. Further, on the upper surface of the frame member 111, there is provided a marker 113 indicating the size of the back air layer obtained by using the sound absorbing panel.
Under such a configuration, the sound absorbing panel 110 is attached to the diffusion panel 100 by screws 130 that pass through the screw holes 112 and reach the screw holes 101 of the diffusion panel 100. FIG. 12 is a top view of the attachment point of the diffusion panel 100 and the sound absorbing panel 110 as viewed in the direction of the arrow in FIG. As shown in the figure, the side portion of the frame member 111 is formed so as to be in surface contact with the curvature of the sound absorbing panel mounting portion in the diffusion panel 100, and the two panels are fixed without any gap by screws 130.
[0031]
By the way, since the diffusion surface of the diffusion panel 100 is a curved surface, the size of the attachable sound absorbing panel 110 and the shape of the frame material differ depending on the attachment location. Here, if no information on the sound absorbing panel and the diffusion panel is described, there is a risk of confusion during construction. Therefore, in each panel according to the present embodiment, a desired sound absorbing panel can be selected very easily by the above-described markers 102 and 113.
FIG. 13 is an enlarged view of a joint between the diffusion panel 100 and the sound absorbing panel 110 as viewed from above. The marker 102 provided on the diffusion panel 100 describes the position of the screw hole 101 and the size of the air layer behind when the sound absorbing panel 110 is attached to that position ("50", "100" in the figure). , "150"). In addition, the size of the back air layer obtained when the marker 113 provided on the sound absorbing panel 110 is attached is described ("100" in the figure). In the diffusion panel and the sound absorbing panel according to the present embodiment, the necessary sound absorbing panel can be attached extremely easily by matching the numerical values of the marker 102 and the marker 113 at the time of construction.
[0032]
After the sound absorbing panel 110 is permanently fastened, the screws 130 are inserted into the unused screw holes 101 as they are. The depth of the screw hole of the diffusion panel 100 is formed with a margin so that the screw 130 can be inserted to the end when the screw 130 is attached without the sound absorbing panel 110 therebetween. Therefore, there is no sense of design discomfort due to the unused screw holes 101 being exposed. As described above, in the diffusion panel 100 according to the present embodiment, the sound absorbing panel can be easily and detachably attached to a desired location, and thus the construction method according to the present invention can improve the construction quality.
[0033]
Note that the configuration of the holding section formed on the diffusion panel is not limited to the mode of the present embodiment. For example, a magic tape, an industrial fastener, a double-sided tape, or the like may be provided. In the case of a magic tape or an industrial fastener, a paired member needs to be provided on the sound absorbing panel, but the effect of improving the construction quality is not lost.
[0034]
【The invention's effect】
Since the method for constructing an acoustic room according to the present invention has the above-described configuration, it is possible to easily and economically provide an acoustic room having desired acoustic characteristics.
In the diffusion panel according to the present invention, the construction quality of the acoustic room can be improved by the holding portion.
[Brief description of the drawings]
FIG. 1 is a perspective view of a diffusion panel according to a first embodiment of the present invention.
FIG. 2 is an exemplary perspective view of the sound absorbing panel according to the embodiment;
FIG. 3 is an exemplary perspective view of a transmission panel according to the embodiment;
FIG. 4 is an exploded perspective view of the acoustic chamber 40 according to the first embodiment of the present invention.
FIG. 5 is a sectional view of a part of a wall surface of the acoustic room 40.
FIG. 6 is a front view of the acoustic room 40 after the actual fastening step of the sound absorbing panel 20 in the method of constructing the acoustic room 40 according to the embodiment.
FIG. 7 is a front view of the acoustic room 40 after the step of disposing the transmission panel 30 in the construction method.
FIG. 8 is a sectional view of a wall surface of an acoustic room 60 according to a second embodiment of the present invention.
FIG. 9 is a perspective view of an acoustic room 70 according to a third embodiment of the present invention.
FIG. 10 is a diagram illustrating a quadrangular pyramid-type diffusion panel as a modification of the diffusion panel.
FIG. 11 is a perspective view of a diffusion panel according to a fourth embodiment of the present invention.
FIG. 12 is a top view of a joint between the diffusion panel and the sound absorbing panel according to the same embodiment.
FIG. 13 is an enlarged view of a joint between the diffusion panel and the sound absorbing panel according to the same embodiment.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 ... Diffusion panel, 10a ... Curved surface, 10b ... Flat surface, 20 ... Sound absorption panel, 21 ... Frame material, 22 ... Surface protection material, 23 ... Sound absorption material, 24 ... Back air layer, 30 ... Transparent panel, 31 ... Frame material, 32 ... Surface protection material, 40 ... Sound room, 50 ... Wall surface, 51 ... Sound insulation layer, 60 ... Sound room, 61 ... Diffusion panel, 61a ... Joint part, 62 ... Sound insulation layer, 70 ... Sound room, 71 ... Rail, 72 ... Hook, 73 ... Ring, 74: guide rail, 75: sound insulation sheet, 100: diffusion panel, 101: screw hole, 102: marker, 110: sound absorbing panel, 111: frame material, 112: screw hole, 113: marker, 130: screw.

Claims (4)

A step of arranging a plurality of diffusion panels having a sound diffusion property on the wall surface of the acoustic room;
A step of temporarily fixing the sound absorbing panel having sound absorbing properties to each diffusion panel so as to straddle a plurality of adjacent diffusion panels that are a part of the plurality of diffusion panels,
In the state where the sound absorbing panel is temporarily fixed, a step of checking whether desired acoustic characteristics are obtained in the acoustic chamber,
Based on the result of the checking step, changing the installation conditions of the sound absorbing panel to obtain the desired acoustic characteristics,
Permanently fixing the sound absorbing panel to the diffusion panel. The diffusion panel has a curved portion on the surface,
The method according to claim 1, wherein the sound absorbing panel is attached to each curved portion of two adjacent diffusion panels. The sound absorbing panel is provided in a plurality of sizes, and by selecting a size of the sound absorbing panel to be attached to each curved portion of the two adjacent diffusion panels, the sound absorbing panel is located at a position separated by a desired distance from the wall. 3. The method according to claim 1, wherein the sound absorbing panel is fixed. In a diffusion panel attached to a wall surface of a room and diffusing sound generated in the room,
The surface protrudes to form a curved surface curved in a circular or elliptical shape,
A diffusion panel having a plurality of holding portions for detachably holding a sound-absorbing panel at a plurality of positions on the curved surface at different distances from the wall when attached to the wall.

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