JP2022158025A - Acoustic hazard prevention device - Google Patents

Abstract

To provide a device for acoustic hazard prevention and the like, that can be easily manufactured, is less susceptible to damage, and has a higher degree of freedom in terms of installation.SOLUTION: A plurality of ribs 3 for acoustic diffusion with a plurality of points P aligned on a surface and connected by line segments L are provided. The ribs are acoustically exposed on the sound incident side Sa, and the plurality of points P are arranged according to the following equation. The angle between an n-th line segment connecting an n-th point and a reference point, and an n+1-st line segment connecting the n+1-st point and the reference point is nα (n is a natural number), and an n range satisfies n+1-st line segment length R(n+1)>n-th line segment length R(n). φ=(1+sqrt(5))/2α=360°*1/(1+φ)SELECTED DRAWING: Figure 1

Description

The present invention relates to an acoustic disturbance prevention device for preventing acoustic disturbance or improving sound quality (hereinafter referred to as "acoustic disturbance prevention or the like"). More particularly, it relates to an acoustic interference prevention device having ribs for an acoustic diffuser placed in a space or the like.

For example, in concert halls, music studios, etc., it is necessary to prevent acoustic disturbances such as flutter echo, long-path echo, and acoustic concentration. Further, for example, the sound quality may be improved according to the music genre or the taste of the musician. In order to prevent these acoustic disturbances or improve the sound quality, an acoustic disturbance prevention device described in Patent Document 1 has been proposed as a technique for individually adjusting the prevention of multiple reflections, the diffusion of sound, and the like.

According to the document, a plurality of three-dimensional polyhedrons (units) for acoustic diffusion that are substantially similar or congruent with each other are arranged close to each other with different orientations, these polyhedrons are joined to each other, and/or , and connected via a connecting body to form an acoustic diffuser. However, according to the same configuration, since each polyhedron forms three-dimensional projections with different orientations, it is necessary to consider that the projections do not come into contact with the human body or objects and are damaged, which limits the installation. . In addition, the intricate unevenness of the polyhedron had to be precisely manufactured with a 3D printer or the like, and there were restrictions on manufacturing.

International Publication WO2020/196900

SUMMARY OF THE INVENTION In view of such conventional circumstances, an object of the present invention is to provide an apparatus for preventing acoustic interference, etc., which can be manufactured easily, is less likely to be damaged than the conventional one, and has a high degree of freedom in terms of installation.

In order to achieve the above object, the apparatus for preventing acoustic disturbances according to the present invention is characterized by having a plurality of ribs for sound diffusion, which are formed by connecting a plurality of points arranged on a surface with line segments. and the plurality of points are arranged according to the following equation to prevent acoustic interference or improve sound quality.
The angle between the n-th line segment connecting the n-th point and the reference point and the n+1-th line segment connecting the n+1-th point and the reference point is nα (n is a natural number), and the n+1-th line segment length R(n+1)>n It has n ranges that satisfy the th line segment length R(n).
φ=(1+sqrt(5))/2
α=360°*1/(1+φ)

According to this configuration, since there is an n range that satisfies n+1th line segment length R(n+1)>nth line segment length R(n), points can be formed without overlapping. The angle between the n-th line segment connecting the n-th point and the reference point and the n+1-th line segment connecting the n+1-th point and the reference point is nα (n is a natural number). do. Since the incident sound is reflected and diffused by the ribs connecting the points P whose mutual angles have elements of the golden angle, the reflection and diffusion proceeds very smoothly, and acoustic disturbances are efficiently eliminated. . Moreover, since it is only necessary to form the ribs of the plate-like body, the manufacturing process can be performed very easily, and since the shape is planar and has few irregularities, it is difficult to break.

In the above structure, R(n+1)/R(n) of the plate-like units may be defined by unity magnification, arbitrary magnification, or nφ times (n is a natural number).

Further, it is preferable that the plurality of points of the plate-like unit body are spirally connected outward from the center side of the reference point to form a rib. Each point is regularly connected by spiral ribs, and it is excellent not only in strength but also in design.

The plate-like unit body may have a frame around it, and the rib may be connected to the frame at a position where the frame crosses the line segment. According to this configuration, the ribs are less likely to be damaged by the frame, and multiple combinations are facilitated.

A plurality of the plate-like unit bodies may be provided, and the plurality of plate-like unit bodies may be stacked with different angles or reversed sides around the reference point. With these changes, the diffusion of sound will be further improved.

Also, the plate-like units may be separated from each other. Diffusion of sound reaches the plurality of plate-shaped unit bodies, and the effect of preventing acoustic disturbance and the like is improved. Specifically, it is preferable to provide spacers between the plate-like unit bodies to separate the plate-like unit bodies.

By interposing the sound absorbing material between the plate-like unit bodies, diffused sound can be efficiently attenuated.

It is preferable to provide a plurality of the plate-like units and arrange the plate-like units on the same plane, or arrange the plate-like units so that the surfaces of the plate-like units form an angle. Further, the plurality of plate-like unit bodies may have different sizes in the direction in which the surface spreads.

By providing an air-permeable blinding material on one surface of the plate-like unit body, it is possible to improve the design and to use it as a flooring material.

The plate-like unit body may have a rib intersection larger than other rib portions at each of the points.

The plate-like unit body may be arranged on the side opposite to the sound source side of the microphone.

In terms of construction, it is preferable to combine different materials on the front and back sides of each plate-like unit body.

You may use the said plate-shaped unit body in combination with another planar member.

The plate-like unit body may be provided on the floor of the room or on the upper surface of a stand on which the sound source is installed.

A plurality of the plate-like units may be connected at their side edges so that the angle can be changed.

Each of the plate-like units can be produced by cutting out a plate material with a knife or laser, or by using a 3D printer.

Each of the plate-like units may be formed by molding using a mold.

According to the characteristics of the acoustic interference prevention device according to the present invention, it is possible to provide an acoustic interference prevention device that can be manufactured easily, is less likely to be damaged than conventional devices, and has a high degree of freedom in installation.

Other objects, configurations and effects of the present invention will become apparent from the following detailed description of the invention.

1 is a front side view of a plate-like unit constituting an apparatus for preventing acoustic disturbances or the like according to the present invention; FIG. FIG. 2 is a cross-sectional view taken along the line AA of FIG. 1; It is an example of the cross-sectional shape of a rib. FIG. 3 is a conceptual cross-sectional view showing a case in which spacers are not provided between multiple layers of plate-like unit bodies that constitute the device for preventing acoustic disturbances, etc. FIG. FIG. 4 is a conceptual cross-sectional view showing a case where spacers are provided between a plurality of layers of plate-like unit bodies constituting a device for preventing acoustic disturbances, etc. FIG. It is a diagram showing the state of taking the first point in the diagram showing the procedure for forming the 1st, 2nd, . . . nth points from the reference point. It is a figure which shows the state which formed the point one by one in the above. It is a figure which shows the procedure which connects a point spirally. Furthermore, it shows a procedure for connecting points in a different spiral. FIG. 10 is a diagram showing a state in which points near a reference point are connected; FIG. 4 is a front view showing an example in which ribs are separated by a rectangular frame; FIG. 4 is a front view showing an example in which ribs are separated by a star-shaped frame. FIG. 4 is a front side view of a plate-like unit showing an example having enlarged portions at intersections of ribs; 1 is a front side view of a device for preventing acoustic disturbances, etc., showing an example in which plate-like units of different sizes are arranged in a plane direction; FIG. FIG. 2 is a front side view of an apparatus for preventing acoustic disturbances, etc., showing an example in which plate-shaped unit bodies with different numbers of layers are arranged in a plane direction; FIG. 2 is a front side view of an apparatus for preventing acoustic disturbances, etc., showing an example in which plate-like units are arranged in a planar direction and stacked. FIG. 2 is a front side view of a device for preventing acoustic disturbances, etc., showing an example in which plate-like units are combined in a square shape and further combined in a three-dimensional manner; It is a perspective view of a device for preventing acoustic disturbances, etc. in which plate-like units are combined on a folding screen, (a) showing a folded state, and (b) showing an unfolded state. FIG. 10 is a perspective view of a device for preventing acoustic interference, etc., showing an example in which plate-like units are incorporated in a partition; FIG. 10 is a perspective view of a device for preventing acoustic disturbances, etc., showing an example in which the plate-like unit body is built into the wall surface of a building; FIG. 3 is a perspective view of a device for preventing acoustic disturbances, etc., showing an example in which a plate-like unit body and a sound absorbing material are combined; FIG. 10 is a perspective view of a device for preventing acoustic interference, etc., showing an example in which a plate-like unit is incorporated into a unit placed on a partition; BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of an acoustic disturbance prevention device showing an example in which plate-like units are stacked to form a flooring material, (a) being an assembled state, and (b) being an exploded perspective view; FIG. 10 is a perspective view of a device for preventing acoustic disturbance, etc., showing an example in which wall materials are stacked on plate-like units; FIG. 11 is a perspective view of a device for preventing acoustic disturbances, etc., showing an example in which a plate-shaped unit body is provided on a window so as to be openable and closable; FIG. 2 is a perspective view of a device for preventing acoustic disturbances, etc., showing an example in which two plate-like unit bodies are combined and attached to a rod-like body; 1 is a perspective view of a device for preventing acoustic interference, showing an example in which a music stand is configured by combining plate-like units in a plane direction; FIG. FIG. 10 is a perspective view of a device for preventing acoustic interference, etc., showing an example in which another music stand is configured by combining plate-like units in the plane direction and stacking them. FIG. 10 is a perspective view of a device for preventing acoustic interference, etc., showing an example in which a plate-like unit is combined with a microphone stand; FIG. 10 is a perspective view of a device for preventing acoustic interference, etc., showing an example in which a plate-like unit is combined with a speaker stand; FIG. 11 is a perspective view of a device for preventing acoustic interference, etc., showing an example in which a plate-shaped unit body is combined with a drum set base; FIG. 10 is a perspective view of a device for preventing acoustic interference, etc., showing an example in which the plate-shaped unit is used as a shield for a concert; FIG. 11 is a perspective view of a device for preventing acoustic interference, etc., showing an example in which a plate-like unit body is used to prevent howling of a monitor speaker; FIG. 2 is a perspective view of a device for preventing acoustic disturbances, etc., showing an example in which a truss is configured by plate-like units; FIG. 10 is a perspective view of a device for preventing acoustic interference, etc., showing an example in which the plate-shaped unit body is used for a pool or the like; FIG. 10 is a perspective view of a device for preventing acoustic interference, etc., showing an example of using a plate-like unit for a remote workspace or the like; 1 is a perspective view of a Helmholtz resonator constructed using plate-like units; FIG.

Next, the present invention will be described in more detail with reference to the accompanying drawings as appropriate.
FIGS. 1 and 2 are front side views of a plate-like unit body 1 constituting an acoustic disturbance prevention device 100 according to the present invention (notation different from the front view is used to express a three-dimensional shape). As will be described later, a plurality of points P are arranged on the plane PL, and ribs 3 are formed at the positions of line segments L connecting the points. The periphery of the rib 3 is surrounded by a rectangular frame 5, and a transmitting portion 7 is formed between the frame 5 and the rib 3 and between the ribs 3.

As shown in FIG. 2, each rib 3 has a rectangular cross section with a front surface 3a, a side surface 3b, and a back surface 3c. scatter in different directions. The plane PL is an XY plane in this example, and a plurality of points P are arranged on this plane PL. Surfaces may be curved after construction, including curved and flat surfaces.

As shown in FIG. 3, the cross section of each rib 3 is rectangular as indicated by reference numeral 3A, semicircular as indicated by reference numeral 3B, circular as indicated by reference numeral 3C, or triangular as indicated by reference numeral 3D. , or may have various cross-sectional shapes as long as it has the transmitting portion 7 described above. Each plate-like unit body can be produced by punching a plate material with a knife, cutting it with a router or laser, or using a 3D printer, depending on the cross-sectional shape of the ribs 3 . A flowable material may be injected into the mold and allowed to solidify. Alternatively, the front and back may be made of different materials, and the front and back may be pasted together after production. After rehabilitating the flat surface, it is also possible to bend the surface so as to form a curved surface. Examples of materials that can be used include wood, synthetic resins such as acrylic and ABS, metals, ceramics, concrete, cement, mortar, plaster, glass, and rubber.

Now consider the effect of the spacer while comparing FIGS. 4a and 4b. FIG. 4a is a conceptual cross-sectional view showing a case where spacers are not provided between the multiple layers of plate-like unit bodies constituting the device for preventing acoustic disturbances, etc. FIG. When the plate-like unit bodies 1a to 1c and the plate-like unit bodies 1d to 1f are overlapped without gaps, the incident sound S1 passes through the transmitting portion 7, is reflected by the frame 5, the wall 200, and the like, and passes through the frame. Only within the range within 5, the reflected sound S2 is radiated to the outside. On the other hand, as shown in FIG. 4b, when spacers 10 are provided between the plural layers of plate-like unit bodies 1a, 1b, 1c, and 1d constituting the device for preventing acoustic disturbances, etc., the spacers 10 are placed in the next unit body beyond the frame 5. The sound is reflected and radiated to the outside as reflected sound S2. Therefore, provision of the spacer 10 enables diffusion using a large number of ribs.

Next, the procedure for designing the ribs 3 and the frame 5 will be described with reference to FIGS. 5a-g. The following is an example, and the ribs may be formed in various ways, such as spirally and radially. A reference point (origin) O is set, and a branch intersection point P is arbitrarily created at a position other than the reference point, and this becomes the first point. where each value is defined as follows:
Golden ratio φ=(1+sqrt(5))/2
Golden angle α=360°*1/(1+φ)

FIG. 5b shows the relationship between the n-th point P(n) and the N+1-th point P(n+1). The distance R from the reference point is φ times the distance at the previous point, and the rotation adds α. As an application, integral multiples may be used, such as nφ for φ and nα for α. Also, when approaching the outer circumference, the distance R from the reference point may be the same as the distance at the previous point, and nα may be added to the rotation. That is, it is sufficient to have n ranges satisfying the n+1th line segment length R(n+1)>nth line segment length R(n).

Then, as shown in FIG. 5c, each point P is connected by a first line segment (rib) La as a counterclockwise spiral. Next, as shown in FIG. 5d, each point is connected by a second line segment (rib) Lb to a helical line in the opposite direction of the previous helical direction. Furthermore, as shown in FIG. 5e, it may be difficult to follow the spiral rule in the vicinity of the reference point O, so it is preferable to connect neighboring ones sequentially with a third line segment (rib) Lc.

After forming the ribs as described above, the ribs are defined by separating the ribs with a frame 5 as shown in FIG. 5f. Here, a first line segment (rib) La and a second line segment (rib) Lb are separated by frames 5, respectively. The frame may be demarcated in any of a variety of ways, including a star-shaped frame 5a as shown in Figure 5g.

By the way, in the above-described embodiment, only the rib exists at the branch intersection point P, and there is no other shape. However, as shown in FIG. may be formed. Also in this case, it is important that the shape of the branch intersections 9 does not prevent the incidence of sound on the ribs 3, expanding in the direction along the plane PL. The enlarged branch intersections 9 can have various shapes such as squares, polygons, etc. in addition to circular shapes, and these may be angularly displaced by integral multiples of the golden angle α.

From FIG. 7 onwards, examples of constructing an acoustic anti-frost damage prevention device by combining a plurality of plate-like unit bodies will be enumerated.

FIG. 7a shows an example in which plate-like units of different sizes are arranged in the plane direction. The combined body 11 is configured by arranging two small plate-shaped unit bodies 11a and one large plate-shaped unit body 11b side by side in the plane PL direction, and constitutes an apparatus 100 for preventing acoustic interference. Each of the shaped units 11a and 11b may be combined after being rotated around the central axis so as to have different angular positions, and so on.

FIG. 7b shows an example in which plate-like units with different numbers of layers are arranged in the plane direction. Of the five plate-shaped unit bodies 13a, 13b, and 13c arranged in the plane PL direction, which constitute the assembly 13, only one plate-shaped unit body 13a is provided at the upper right and lower left positions. Two plate-like unit bodies 13a, 13b are stacked at the lower right position, and three plate-like unit bodies 13a, 13b, 13c are stacked at the center position. In each of the overlapping portions, the same plate-like unit bodies are overlapped with their directions changed by 90 degrees.

FIG. 7c shows an example in which the plate-like units are arranged in the plane direction and stacked. The combined body 15 is formed by arranging nine plate-like unit bodies 15a in the plane direction, arranging four plate-like unit bodies 15b thereon, and further stacking the plate-like unit body 15c on the uppermost stage with an inclination of 45 degrees. be.

FIG. 7d shows an example in which plate-like units are combined in a square shape and further combined in a three-dimensional manner. The combined body 16 further combines four rectangular bodies 17A to 17D each formed by combining a plurality of plate-shaped unit bodies 17 into a rectangular shape.

FIG. 8 shows an example in which plate-like units are assembled on a folding screen, where (a) shows the folded state and (b) shows the unfolded state. The folding screen body 19 is composed of three plate-like units 19a, 19b, and 19c combined with hinges provided on the side edges so that the angle can be freely changed.

FIG. 9a shows an example in which plate-like units are incorporated into partitions. The partition booth 20 has a plurality of plate-like units 21 mounted on a front partition 201a of a partition 201 and a lateral partition 201b fixed orthogonally, and a table 203 is provided. It is possible to prevent leaks of conversations and the like in each booth, and there is also the advantage that air-conditioning and fire-fighting problems are less likely to occur. A plurality of plate-like units 21 may be hung from the ceiling or the like without being fixed on the partition 201 .

FIG. 9b shows an example in which the plate-like units are incorporated into the walls of a building. The combined body 22 is formed by combining the plate-like units 23 and the small walls 205 in a staggered manner, and further combining them with the large wall 206 . A blinding material such as an air-permeable cloth may be provided on the combination of the plate-like units 23 and the small walls 205 in a zigzag pattern.

FIG. 10 shows an example in which a plate-like unit body and a sound absorbing material are combined. The laminated body 24 is obtained by stacking the plate-like unit body 25 and the frame body 207 incorporating the sound absorbing material 208 .

FIG. 11 shows an example in which a plate-like unit body is incorporated into a unit placed on a partition. The upper unit 27 has a pair of side plates 211 provided below a plurality of plate-like unit bodies 27 a and 27 b spaced apart and connected by a lower plate 213 and a horizontal plate 215 . In order to reduce the sound pressure, the sound absorbing material may be accommodated in the cavity between the plate-like units 27a and 27b. In use, it is preferable to fit and fix the upper part of the partition between the pair of side plates 211 .

FIG. 2 is a perspective view of a device for preventing acoustic disturbances, showing an example in which plate-like units are stacked to form a flooring material; The unit floor material 29 is composed of plate-like unit bodies 29a and 29b and a mesh plate 29c as a blinding material separated by spacers 29d. The spacer 29d may be made of a hard material, or may be made of an elastic material such as rubber or synthetic resin.

FIG. 13 shows an example in which a wall material is superimposed on a plate-like unit. A wall material 219 is provided on the back surface of the plate-like unit body 31 . For example, when plaster is used, it is expected that the design is improved, the scattering can be varied, and the hygroscopicity is also improved. Concrete, cement, mortar, etc. may be used instead of plaster. ,

FIG. 14 shows an example in which a plate-like unit body is provided on a window so as to be openable and closable. In this example, a pair of plate-like units 33a and 33b are attached to two window frames 221 at hinge sides 33c on the side edges so that they can be opened and closed by hinges. In addition to windows, doors may also be provided. Since windows and doors with facing surfaces are likely to cause acoustic interference, there is an advantage in providing the device 100 for preventing acoustic interference. It is less likely to interfere with lighting and ventilation.

FIG. 15 shows an example in which two plate-like units are combined and attached to a rod-like body. The shield 34 is a combination of the front material 35A and the back material 35B, each of which is a combination of two plate-like unit bodies 35 connected at their centers with a connection plate 225 and spaced apart with a spacer 35a. be. A mounting belt 227 is passed through the through-cut 226 to connect the front and back surfaces, and the mounting belt 227 is tightened to fix the rod-shaped body 231 at an arbitrary position.

FIG. 16 shows an example in which a music stand is constructed by combining plate-like units in the plane direction. The music stand 37 is composed of a large plate-like unit 37b and small plate-like units 37a attached to four locations around the plate-like unit 37b.

On the other hand, FIG. 17 shows an example in which plate-like units are combined in the plane direction and stacked to form another music stand. The music stand attachments 38 are provided at four corners of each of the four plate-like units 39 , the front plate 241 and the rear plate 243 . A notch 243a is provided in the center of the back plate 243 to prevent interference with the music stand, and is fixed to the back plate 245a supported by the support 245b of the music stand 245 so as to be sandwiched from the front and back.

FIG. 18 shows an example of microphones for vocalists, moderators, etc., in which plate-like units are combined with a microphone stand. The microphone shield 41 is fixed to the microphone stand 251a of the microphone 251 via the sound interference prevention device holder 255, with the pair of plate-like units 41a and 41b separated by the square spacer 41c. This is the opposite direction to the windshield 253 attached in front of the microphone with the shield holder 253a. It should be noted that both sides of this type of shield can serve as sound incident sides Sa, and the same applies to the partitions described above and other shields described below.

FIG. 19 shows an example in which a plate-like unit body is combined with a speaker stand. The speaker stand 43 supports mutually inclined plate-like units 43a and 43b with a pair of front legs 43c and a pair of rear legs 43d. A speaker 257 is placed on top. It is possible to effectively prevent acoustic disturbances and the like in a narrow space.

FIG. 20 shows an example in which plate-like units are combined with a drum set base. The drum base 45 is a combination of four unit bases 45A to 45D, on which a drum set 259 is placed. Each of the unit bases 45A to 45D consists of plate-like unit bodies 45a, 45b and a mesh plate 45c which are separated and fixed by four corner spacers 45d. For example, it is expected to prevent the sound of a piano from being transmitted to the floor and the vibration of the drum to cause cymbals to ring (structure-borne sound).

FIG. 21 shows an example of using a plate-like unit as a concert shield. The shield 47 is formed by stacking plate-like units 47a and 47b on the front and back, and is placed between the players using the musical instruments 261a and 261b to protect the ears of the player sitting in front. By attaching a sound-transmitting cloth, it is expected to have the effect of suppressing the scattering of virus droplets.

FIG. 22 shows an example in which a plate-like unit body is used to prevent howling of a monitor speaker. The howling prevention body 49 is a combination of plate-like unit bodies 49 a and 49 b on the front and back, and is arranged in front of the speaker surface 263 a of the monitor speaker 263 . For example, howling between the microphone 265 and the speaker 263 can be prevented.

FIG. 23 shows an example in which a truss is composed of plate-like units. The truss 51 is a combination of a plurality of plate-like unit bodies 51a to 51f bearing different surfaces, and installation variations such as different rotation directions are conceivable.

FIG. 24 shows an example of using a plate-like unit for a pool or the like. The plate-like unit body 53 is made of, for example, a waterproof material, and is provided on the wall surface 271 of the pool 269 . In pools, the voices of coaches and instructors may be difficult to hear due to flutter echo, etc., and are suitable for improving this type of situation. Since it does not scatter like glass wool, it is less likely to cause problems in terms of installation.

FIG. 25 shows an example of using a plate-like unit for a remote workspace or the like. The plate-like unit body 55 is provided on the wall surface 273 a inside the remote workspace 273 . A desk 275a, a chair 275b, and other office equipment are used in the figure. In this type of narrow space, echoes are likely to occur during web conferences, and it is difficult for the user to feel discomfort due to the sound being too quiet when the sound is cut only by the sound absorbing material.

FIG. 26 is a perspective view of a Helmholtz resonator constructed using plate-like units. A Helmholtz resonator 59 can also be configured by attaching a perforated plate 58 having a large number of through holes 58 a to the entire surface of the plate-like unit body 57 .

It should be noted that the above embodiments of the present invention can be implemented in combination with each other as long as they do not conflict with each other.

INDUSTRIAL APPLICABILITY The present invention can be used as a device for preventing acoustic interference, etc. for a part of a building or a room, a part of office furniture, an individual shield, a howling prevention device, or the like.

1, 1a to 1f: plate-like unit body, 3: rib, 3a: front surface, 3b: side surface, 3c: back surface, 5: frame (rectangular frame), 5a: star side frame, 7: transmission part, 9: intersection part , 10, 10a, 10b, 10c: spacer, 11: combination, 11a, 11b: plate-like unit, 13: combination, 13a, 13b, 13c: plate-like unit, 15: combination, 15a, 15b, 15c: plate-like unit, 16: assembly, 17: plate-like unit, 17A to D: square, 19: folding screen, 19a, 19b, 19c: plate-like unit, 20: partition booth, 21: plate 22: Combined body 23: Plate-shaped unit 24: Laminated body 25: Plate-shaped unit 27: Top unit 27a, 27b: Plate-shaped unit 29: Unit floor material 29a , 29b: plate-like unit, 29c: mesh plate, 31: plate-like unit, 33a, 33b: plate-like unit, 33c: hinge side, 34: shield, 35: plate-like unit, 35a: spacer, 35A : front material, 35B: backing material, 37: music stand, 37a, 37b: plate-shaped unit body, 38: music stand attachment, 39: plate-shaped unit body, 41: microphone shield, 41a, 41b: plate-shaped unit body, 41c: spacer, 43: speaker stand, 43a, 43b: plate-like unit, 43c: front leg, 43d: rear leg, 45: drum stand, 45a, 45b: plate-like unit, 45c: mesh plate, 45d: Spacer, 45A to D: Unit table, 259: Drum set, 47: Shield, 47a, 47b: Plate-shaped unit body, 49: Howling prevention body, 49a, 49b: Plate-shaped unit body, 51: Truss, 51a to f: Plate-like unit 53: Plate-like unit 55: Plate-like unit 57: Plate-like unit 58: Perforated plate 58a: Through hole 59: Helmholtz resonator 100: Device for preventing acoustic disturbance , 200: wall, 201: partition, 201a: front partition, 201b: horizontal partition, 203: table, 205: small wall, 206: large wall, 207: frame, 208: sound absorbing material, 211: side plate, bottom 213: Plate 215: Horizontal plate 219: Wall material 221: Window frame 225: Connecting plate 226: Through cut 227: Mounting belt 231: Rod-shaped body 233: Music receiver 235: Post 241: Front plate , 243: Back plate, 243a: Notch, 245: Music stand, Back plate: 245a, 245b: Post, 251: Microphone, 251a: Microphone stand, 253: Windshield, 253a: Shield holder, 255: Device for preventing acoustic disturbance holder, 257: Speaker, 261a, 261b: Musical instrument, 263: Monitor speaker, 263a: Speaker surface, 265: Microphone, 269: Pool, 271: Wall surface, 73: Remote workspace 2, 273a: Wall surface, 275a: Desk, 275b: Chair, PL : surface, P: point, L: line segment, Sa: incident side, Sb: back side, La: first line segment (rib), Lb: second line segment (rib), Lc: third line segment (rib) , P(n): n-th point, O: reference point, L(n): n-th line segment, P(n): n+1-th point, L(n+1): n+1-th line segment, α: mutual line segment angle, R(n+1): length of n+1st line segment, R(n): length of nth line segment

Claims (19)

It has a plurality of ribs for acoustic diffusion connecting a plurality of points lined up on the surface with line segments, these ribs are acoustically exposed on the sound incident side, and the plurality of points are obtained by the following equation: An acoustic interference prevention device having a plate-like unit for preventing acoustic interference or improving sound quality.
The angle between the n-th line segment connecting the n-th point and the reference point and the n+1-th line segment connecting the n+1-th point and the reference point is nα (n is a natural number), and the n+1-th line segment length R(n+1)>n It has n ranges that satisfy the th line segment length R(n).
φ=(1+sqrt(5))/2
α=360°*1/(1+φ) 2. A device for preventing acoustic disturbances, etc., according to claim 1, wherein R(n+1)/R(n) of said plate-like unit body is defined by unity magnification, arbitrary magnification, or nφ times (n is a natural number). 3. An apparatus for preventing acoustic disturbances, etc., according to claim 1, wherein said plate-like unit body has said plurality of points spirally connected outwardly from the center side of the reference point to form a rib. 4. A device for preventing acoustic disturbances according to claim 1, wherein said plate-like unit has a frame around it, and said ribs are connected to said frame at positions where said frame intersects said line segments. 5. The apparatus for preventing acoustic disturbances, etc., according to claim 1, wherein a plurality of said plate-like unit bodies are provided, and said plurality of plate-like unit bodies are stacked at different angles or turned upside down around said reference point. 6. An apparatus for preventing acoustic disturbances, etc., according to claim 5, wherein said plate-like units are separated from each other. 6. An apparatus for preventing acoustic disturbances, etc., according to claim 5, wherein spacers are provided between the plate-like units to separate the plate-like units. 8. A device for preventing acoustic disturbances, etc., according to claim 6, wherein a sound absorbing material is interposed between each of said plate-like units. 9. Any one of claims 1 to 8, wherein a plurality of said plate-like unit bodies are provided, and a plurality of each plate-like unit body are arranged on the same plane, or a plurality of plate-like unit bodies are arranged so that the surfaces of each plate-like unit form an angle. Apparatus for preventing acoustic interference, etc., as described. 10. An apparatus for preventing acoustic disturbances, etc., according to claim 9, wherein said plurality of plate-like unit bodies have different sizes with respect to the direction in which the surface spreads. 11. The apparatus for preventing acoustic disturbances, etc., according to claim 1, wherein one surface of said plate-like unit is provided with an air-permeable blinding material. 12. The apparatus for preventing acoustic disturbances, etc., according to claim 1, wherein said plate-like unit body has a rib crossing portion larger than other rib portions at each of said points. 13. The apparatus for preventing acoustic disturbances, etc., according to claim 1, wherein the plate-like unit body is arranged on the side opposite to the sound source side of the microphone. 14. An apparatus for preventing acoustic disturbances, etc., according to claim 1, wherein each of said plate-like unit bodies is a combination of different materials on the front and back sides of the surface. 15. The apparatus for preventing acoustic disturbances, etc., according to claim 1, wherein said plate-like unit body is used in combination with another planar member. 16. The apparatus for preventing acoustic disturbances, etc., according to claim 1, wherein said plate-like unit body is provided on the floor of a room or on the upper surface of a stand on which a sound source is installed. 16. The apparatus for preventing acoustic disturbances, etc., according to claim 1, wherein a plurality of said plate-like unit bodies are connected at their side edges so as to change the angle thereof. 18. The apparatus for preventing acoustic disturbances, etc., according to any one of claims 1 to 17, wherein each of the plate-like units is cut out from a plate material with a knife or a laser, or is created using a 3D printer. 18. The apparatus for preventing acoustic disturbances, etc., according to claim 1, wherein each of said plate-like unit bodies is formed by molding using a mold.

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