KR100581534B1 - The sound diffuser - Google Patents

Abstract

The present invention relates to an acoustic diffusion plate.

The acoustic diffusion plate of the present invention is formed of a flame-retardant synthetic resin plate material, is partitioned into a plurality of compartments of irregular height, and each compartment has a plurality of sound diffusion grooves having different depths.

According to the acoustic diffusion plate of the present invention, it is made of flame-retardant plate material, so there is little risk of fire, and a plurality of grooves are formed in each compartment, so that the sound wave diffusion rate is higher, so that the resonance equation and the porous sound absorption can be made. There is no need to attach or soundproof coating.

Acoustic, diffuser, sound absorption, groove, flame retardant

Description

Diffusion plate {THE SOUND DIFFUSER}             

1 is a perspective view showing a conventional acoustic diffusion plate.

Figure 2 is a partially cut perspective view showing a sound diffusion plate of the present invention.

Figure 3 is a partially cut perspective view showing another example of the acoustic diffusion plate of the present invention.

Figure 4 is a partially cut perspective view showing an example of the sound absorbing material is filled in the acoustic diffusion plate of the present invention.

5 is a plan view showing a sound absorption hole of the acoustic diffusion plate of the present invention.

Figure 6 is a partially cut perspective view showing a state in which the diaphragm is installed in the acoustic diffusion plate of the present invention.

Figure 7 is a schematic diagram showing the arrangement of the components for sound absorption of the acoustic diffusion plate of the present invention.

<Detailed Description of Major Symbols in Drawing>

10: sound diffusion plate 11: sound diffusion groove

11a: small groove 11b: sound absorption hole

11c: 20: sound absorbing material

30: damping member 40: removable means

50: diaphragm

The present invention relates to an acoustic diffusion plate.

In general, the sound wave can be divided into a direct sound and an indirect sound depending on whether or not the sound wave is reflected through a reflector such as a wall.

The direct and indirect sounds control the listener's hearing, and the listener's auditory elements can be divided into volume, diffuseness, and reverberation.

The volume is a feeling determined by the direct sound, which expresses sound quality and plays a role in locating the sound image.

Diffusion is a feeling of coming from a specific direction of the indirect sound 20 to 80 ms after the arrival of the direct sound, reinforces the direct sound and increases the intelligibility.

Reverberation is a feeling that comes from the entire space of the indirect sound comes after 80 ms after the arrival of the direct sound, and serves to reduce the clarity.

It is a technology that can provide high quality hearing in the studio or sound room by using the basic characteristics of the above sound, and it is possible to arbitrarily adjust the diffusion angle by forming a plurality of reflection wings that are rotatable. Multipurpose sound board '(Korean Utility Model Registration No. 20-0243298) was devised.

By the way, the above device has a complicated configuration for manipulating the reflection wing, it is difficult to evenly spread the sound waves because the sound waves are reflected only in one direction when adjusting the sound waves.

In order to solve this problem, a 'sound block' (Korean Utility Model Registration No. 20-0182637) was devised, which is composed of grooves and protrusions having irregular heights and depths to spread the sound evenly in the room.

The above device is attached to the wall or ceiling of the room to form a reflective surface irregular shape to minimize the generation of standing waves, and diffuse the reflection of the sound to give a sense of sound space.

By the way, such a device is formed of an expandable polystyrene resin has a weak problem in fire.

In addition, there is a problem in that polystyrene processing is difficult to form small grooves and protrusions.

In addition, the sound-absorbing coating is applied to the surface, the manufacturing process is complicated, there was also a problem that the product cost increases.

The acoustic diffusion plate of the present invention is intended to solve such a problem, and is formed of a flame retardant synthetic resin plate to reduce the risk of fire.                         

In addition, the sound diffusion plate is divided into a plurality of cells having different heights, and sound diffusion grooves having different depths are formed in each cell, and thus there is also an object to increase the sound wave diffusion rate.

In addition, by forming a sound-absorbing hole in each sound diffusion groove, it is possible to actively control the sound-absorption effect throughout the whole zone, and in particular, there is also a purpose to increase the sound absorption rate of low-frequency sound waves that were difficult to control.

The present invention relates to an acoustic diffusion plate.

The acoustic diffusion plate of the present invention is made of a flame-retardant synthetic resin plate to reduce the risk of fire.

In addition, a plurality of sound diffusion grooves are formed in each cell having a different height, thereby increasing the sound wave diffusion rate.

In addition, through the sound-absorbing hole to resonate, perforated sound absorption so that there is no need to attach a separate sound absorbing material or a sound-absorbing coating.

To this end, the acoustic diffusion plate of the present invention is formed of a flame-retardant synthetic resin plate material, is divided into a plurality of compartments of irregular height, each compartment is formed with a plurality of sound diffusion grooves having different depths.

Hereinafter, the technical idea of the present invention will be described in detail with reference to the accompanying drawings.

However, the accompanying drawings are only one example for more specifically describing the technical idea of the present invention, and thus the technical idea of the present invention is not limited to the accompanying drawings.

The acoustic diffusion plate 10 of the present invention is made of a flame retardant synthetic resin sheet.

Such flame retardant synthetic resin plate materials include flame retardant ABS (Acrylonitrile-Butadiene-Styrene Resin), flame retardant PS (PolyStyrene), and the like.

Such plates are generally compared with those which are not suitable as interior materials because foam polystyrene, which is used as a material for acoustic blocks or acoustic diffusion plates, is easily flammable.

The sound diffusing plate 10 of the present invention is divided into a plurality of compartments, each of which has an irregular height, and each compartment has a plurality of sound diffusion grooves 11 having different depths. .

The reason for forming the plurality of sound diffusion grooves 11 is that when the sound waves arriving on the sound diffusion plate 10 are reflected out, the direction of sound waves is diffused more evenly into the indoor space so that the sound density is uniform in the room. It is to make it possible.

In addition, when the sound diffusion plate 10 having the plurality of sound diffusion grooves 11 is formed at the point where the initial reflection sound is reflected, it is possible to effectively optimize the reverberation.

This is because the masking phenomenon is used to make the early reflection sound reinforce the direct sound so that the reverberation sound coming after the direct sound is relatively inaudible.

In particular, the sound diffusion groove 11 is good for dispersing high frequency sound waves with short wavelength.

The reason for differently forming the depth of the sound diffusion groove 11 is to prevent the irregular transmission of sound waves to either side in reflecting sound waves, such as irregularly forming the height of each compartment.

Such a structure is different from the conventional acoustic block made of a foamed styrene resin, and a plurality of grooves and protrusions having different heights are formed in a synthetic resin such as foamed styrene, making it difficult to form fine grooves.

In other words, the expanded polystyrene is difficult to be finely processed to limit the number of irregular faces that can be formed per unit area.

In contrast, in the present invention, by using a material such as ABS or PS, by additionally forming a plurality of candama sound diffusion grooves 11 partitioned to have an irregular height, the number of faces formed per unit area is much higher than that of conventional acoustic blocks. It is supposed to be a lot.

In the above configuration, the sound diffusion hole 11b may be further formed in the sound absorption hole 11b to perform resonance sound absorption.

That is, since the sound diffusion plate 10 is plate-shaped, when the sound absorption hole 11b is attached to the wall, a space is formed between the wall surface and the sound absorption hole 11b to enter the space through the sound absorption hole 11b. The sound coming in is resonant sound absorbed.

In this case, in order to increase the sound absorption rate, the sound absorbing material 20 made of microfiber may be attached to the rear surface of the sound diffusion plate 10, or the rear surface of the sound absorbing hole 11b may be filled with the ultrafine sound absorbing material 20.

The reason for attaching the ultra-microfiber sound absorbing material 20 is that the sound wave introduced into the space between the wall surface and the sound diffusion plate 10 through the sound absorbing hole 11b is absorbed through the microfine space unique to the microfiber yarn, and the sound absorption rate is increased. .

In particular, in order to increase the sound absorption rate, it is more preferable to attach the microfiber sound absorbing material 20 between the sound absorbing hole 11b and the wall to the rear surface of the sound diffusion plate 10 at a distance from the sound absorbing hole 11b.

In addition, while the general sound absorbing material 20 is weak to heat, the ultra-microfiber sound absorbing material 20 has a flame retardancy, there is also an advantage of less fire risk.

As the sound absorbing hole (11b) is formed in this way it is possible to adjust the sound absorption and dispersion at the same time.

In particular, since the sound absorbing hole 11b is formed on the bottom surface of the sound diffusion groove 11, the sound absorbing hole 11b may absorb a lot of sound in a low tone region affected by standing waves.

This means that when the sound absorbing hole 11b is not formed, when the sound of the low sound region is reflected from the bottom surface of the sound diffusion groove 11, the sound propagation speed is relatively slow compared to the high sound region, so that the low sound region is high to the listener. The sound is separated later than the area to prevent a drop in hearing.

That is, by absorbing the sound of the bass region reflected from the bottom of the sound diffusion groove 11, the listener does not hear the sound of the bass region separately.

This is compared with the conventional sound diffusion plate only to increase the sound absorbing performance of the material itself in order to have a sound absorbing effect, and the sound absorption performance is greatly increased by applying the resonance and pore sound absorption methods.

In addition, unlike the conventional sound diffusion plate by adjusting the position, diameter, number of sound absorbing holes (11b) through a simulation or manufacturing test will be able to actively control the sound absorbing effect.

In particular, it is possible to increase the absorption rate of low frequency sound through a porous sound absorption method, which is remarkably distinguished from the conventional sound wave diffusion plate.

In the above configuration, a plurality of stages (11c) may be formed on the bottom surface of the sound diffusion groove (11).

This is also a method for increasing the negative diffusion rate and preventing standing waves.

Width and depth of the step (11c) can be formed in various ways.

For example, when formed of an ABS flame retardant plate, it is possible to cause a height difference of 1 or 2 mm at intervals of 1 or 2 mm.

Moreover, the small groove 11a may be formed instead of the step 11c.

For example, the small groove 11a may be formed at a depth of 1 to 2 mm and a width of 1 mm at intervals of 1 mm.

If the end (11c) or the small groove (11a) is formed as described above, the sound diffusion plate of the present invention becomes more diffused.

Specifically, the feeling of diffusion can be formed by diffuse reflection in a state in which the sound is spread evenly in the space and the imbalance disappears.

That is, by forming the minute step 11c or the small groove 11a, the dispersion ratio of each compartment of the acoustic diffusion plate 10 is increased, and further dispersion effects can be obtained according to the orientation direction of the panel.

In the above configuration, the vibration damping member 30 may be attached to the rear surface of the acoustic diffusion plate 10.

That is, when the sound diffusion plate 10 of the present invention is installed in a room where no separate soundproofing is installed, when the vibration damping member 30 is attached to the back and installed on the wall, the sound waves are transferred to the adjacent room on the wall. It can be prevented.

As the vibration damping member 30, a vibration damping tape, a vibration damping plate, or the like may be used, and a vibration damping spray may be sprayed to have a vibration damping effect.

In the above configuration, a fixing rib is formed on the edge portion to fix the wall or ceiling.

As a fixing method, a fixing hole may be formed in the wing portion, and a bolt or nail may be inserted into the fixing hole to fix the wall or the like.

In addition, the detachable means 40 such as a Velcro tape may be fixed to the rear surface of the acoustic diffusion plate 10.

When the Velcro tape is provided in this way, the wall surface is made of fiber and can be easily attached and detached without additional fixing means.

In the above configuration, each cell is inclined, and the height of the cell may be formed to be higher toward the center and lower toward the rim.

The inclination angle can be variously formed, but it is preferable to form the inclination of 10 to 20 degrees from the bottom surface.

This is because, if the inclination angle is too large, the sound reflected from the acoustic diffuser 10 may interfere with the sound wave coming from the speaker toward the speaker.

At this time, in forming the sound diffusion groove 11 formed in each compartment, or the plurality of stages 11c or the small groove 11a formed in the sound diffusion groove 11, the sound diffusion groove 11, stage ( 11c), The small groove 11a is preferably formed at the same angle as the inclination angle of each compartment.

In addition, when the center is formed to be high, the time difference of sound transmission is linear than the height difference only, and the hearing is much improved, and the phenomenon of acoustic focus on the front of the diffuser plate 10 may be prevented. .

In addition, when the center is formed in a convex triangular pyramid shape, the overall structure is suitable for dispersing low frequency sound, and is suitable for distributing mid and low frequency sound through the sound diffusion groove 11 and the small groove 11a. As a result, the dispersion effect is evenly distributed over the entire band.

This is different from the way it guarantees effectiveness only in certain bands.

In the above configuration, when installing the sound absorbing material 20, the diaphragm 50 may be provided on the back of the sound absorbing material 20.

When the diaphragm 50 is installed, the low frequency sound absorbing ability is greatly improved. If the diaphragm 50 is installed at the bottom of the room, the sound absorbing effect can be further increased.

When the diaphragm 50 is installed, the rear surface of the diaphragm 50 does not contact the wall, the vibration damping member 30, or the like, and is preferably installed away from the rear side as shown in FIG. 6.

In order to actively control the sound absorbing effect, as shown in FIG. 7, it is preferable to install all of the sound absorbing holes 11b, the sound absorbing material 20, and the diaphragm 50.

That is, in the space below the sound absorbing hole 11b, the mid and low frequency sound waves are resonantly absorbed through resonance, and in the part where the microfiber absorbing material 20 is installed, the sound waves in the mid and high range are perforated sound absorbing, and the diaphragm ( In 50), low-frequency sound waves are absorbed by diaphragm type so as to increase the sound absorption effect over the entire band.

The reason why different sound absorption methods should be used for each frequency band is because the wavelengths are all different.

Specifically, the lower the sound, the longer the wavelength, the diffraction occurs well, it is difficult to disperse the small structure, and should be absorbed in a manner using a diaphragm or resonator rather than a pore type.

In addition, the higher the sound, the shorter the wavelength, the easier it is to disperse into a small structure, it is possible to absorb the material with small holes such as fibers and sponges.

In addition, by selectively installing the sound-absorbing hole (11b), the sound absorbing material 20, the diaphragm 50 as described above may improve the sound-absorbing effect in only a certain band.

The sound diffusing plate 10 configured as described above may further increase the effect depending on how it is arranged in the room.

For example, the sound diffusing plate 10 is installed at a position where the negative primary reflection sound arrives, but the sound diffusing plate 10 is not formed at the upper portion thereof, and the sound absorbing hole 11b is disposed at the middle portion thereof. The sound diffusion plate 10 in which this is formed can be provided in the lower part with the sound absorption board in which the general sound absorption panel and the diaphragm 50 are provided.

The reason for installing the upper, middle, and lower parts in this way is to refer to the movement of the high frequency sound waves in the high frequency region and the low frequency sound waves in the lower position. Because you can control.

As an example of the sound diffusion plate 10 of the present invention configured as described above, it can be formed as shown in FIG.

In the acoustic diffusion plate 10 of the drawing, each compartment has a width and a vertical length of 7 cm, respectively, in which 49 heights are formed in total, and each compartment has six sound diffusion grooves 11 formed therein. 3 small grooves 11a are formed in each of the sound diffusion grooves 11 to form a total of 882 irregular surfaces.

In addition, fourteen sound absorbing holes 11b are formed in each cell.

The microfiber sound-absorbing material 20 is attached to the rear side, the vibration damping member 30 is attached to the rear side, one side of the Velcro tape is fixed to the rim.

Referring to the operation of the present invention configured as described above are as follows.

When the sound diffusion plate 10 of the present invention is installed on a wall or a ceiling, and sound waves are generated through a speaker or the like, the sound waves are primarily reflected in each compartment.

At this time, some of the primary reflected sound is reflected by hitting the side walls of the adjacent compartment.

Sound waves entering the sound diffusion groove 11 are primarily reflected in the sound diffusion groove 11, and some of them are reflected by hitting adjacent cells again.

As the sound waves are reflected many times, the sound waves spread out evenly.

In this case, when the sound absorption hole 11b is formed at the bottom of the sound diffusion groove 11, some sound waves are resonant sound absorption in the space between the sound diffusion plate 10 and the wall through the sound absorption hole 11b.

In particular, the sound absorbing hole 11b is formed lower than the bottom of each compartment, so that absorption of sound waves in the low sound region is prominent.

In addition, when the sound absorbing material 20 made of microfiber is attached to the rear surface of the sound diffusion plate 10, the sound absorbing effect is increased, and the sound wave that is going to the outside through the sound absorbing hole 11b again is significantly reduced.

In addition, when the vibration damping member 30 is attached, the vibration generated in the wall due to the sound waves in the bass region is suppressed and the vibration damage is not caused in the adjacent room.

When the detachable means 40 such as the Velcro tape is formed, the detachable means 40 may be detachably attached to the fibrous wall so as to increase the maximum effect depending on the position of the sound source such as the speaker and the direction of the sound wave.

In this way, the sound diffusing plate 10 of the present invention may be installed only at a point that maximizes the effect without having to fill the entire wall.

In addition, it is also possible to provide an acoustic wave reflecting plate at the upper portion, an acoustic diffusion plate 10 of the present invention in the middle, and a sound absorbing plate at the lower side in combination with a general sound absorbing plate and a sound wave reflecting plate.

According to the present invention, it is made of a flame retardant plate material, thereby reducing the risk of fire.

In addition, it is divided into a plurality of cells having different heights, and a plurality of grooves are further formed in each cell to increase the sound wave diffusion rate.

In addition, resonant sound absorption can be performed through the sound absorbing hole, so that a separate sound absorbing material does not have to be attached or the sound absorption coating.

In addition, an acoustic wave diffusion plate having sound absorption and dispersion effects over the entire band is provided.

Claims (8)

In the acoustic diffusion plate, A sound diffusion plate is formed of a flame-retardant synthetic resin plate, partitioned into a plurality of compartments of irregular height, each compartment is formed with a plurality of sound diffusion grooves 11 of different depths. The method of claim 1, A plurality of sound absorbing holes (11b) is formed on the bottom of the sound diffusion groove (11), Acoustic diffuser. The method of claim 2, Ultrasonic sound absorbing material 20 is attached to the bottom of the sound diffusion plate, characterized in that to form a space between the sound diffusion plate, Acoustic diffuser. The method of claim 3, wherein The diaphragm 50 is attached to the bottom surface of the sound absorbing material 20, characterized in that the diaphragm type sound absorption, Acoustic diffuser. The method according to claim 1 or 2, Characterized in that a plurality of small grooves 11a having different heights are formed on the bottom surface of the sound diffusion groove 11, Acoustic diffuser. The method according to claim 1 or 2, Detachable means 40 is provided on the bottom surface of the edge of the sound diffusion plate for attaching and detaching the sound diffusion plate on the wall, Acoustic diffuser. The method according to claim 1 or 2, The bottom surface of the sound diffusion plate is characterized in that the vibration damping member 30 for suppressing the transmission of vibration to the wall is attached, Acoustic diffuser. The method according to claim 1 or 2, Each compartment of the acoustic diffusion plate is formed as the height is higher toward the center, characterized in that each is inclined irregularly, Acoustic diffuser.

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