KR20200019560A - Soundproof wall with acoustic block - Google Patents

Abstract

The present invention relates to a soundproof wall built with an acoustic block. The soundproof wall comprises the acoustic block including a box shape portion having an open upper portion formed by a front wall, a rear wall disposed in parallel to the front wall to be distanced from the front wall, both side walls facing each other while connecting both ends of the front and rear walls, and a base wall disposed on lower portions of the front wall, the rear wall, and both the side walls; an opening portion formed in the front wall in a thickness direction; and a hollow portion defined by the front wall, the rear wall, both the side walls, and the base wall and fluid communicating with the opening portion. Preferably, according to the present invention, the soundproof wall allows noise entering an air passage to be introduced into the opening portion of the acoustic block communicating with the air passage, thereby reducing noise by a resonance phenomenon.

Description

Soundproof wall with acoustic block {Soundproof wall with acoustic block}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a soundproof wall, and more particularly to a soundproof wall constructed of acoustic blocks configured to sound insulation of a specific frequency band based on resonance phenomena.

With the rapid industrial development, traffic volume is increasing, and roads, railroads, airports, etc. are expanding to secure smooth traffic volume. Sound barriers are installed around roads, railways, and airports to block the transmission of noise from transportation.

 In general, the soundproof wall is to install a plurality of struts at a predetermined interval to stand vertically, and then install a soundproof panel having a sound absorption (or sound insulation) laminated to block the noise.

In the structure of the soundproof panel according to Patent Document 1, a recess is formed in the front portion of the soundproof panel body, and a cover having a plurality of sound absorbing holes is disposed in the opening of the recess. The soundproof wall disclosed in Patent Document 1 has a structure that effectively absorbs vibration and noise through a resonance chamber defined by a recess and a cover, and the panel-type soundproof wall blocks not only sound but also airflow to prevent wind load. ) Does not take into account the problem.

Patent document 2 proposes a ventilated soundproof panel that can reduce wind load, and includes a horizontal plate (compartment frame) and a vertical plate (between a front plate having a plurality of front separators and a rear plate having a plurality of rear separators). A resonance chamber partitioned by a partition wall). The resonance chamber applies the clearance gap between the plates installed at intervals in the partition frame as the resonance hole. Patent Document 2 actually consists of a resonance chamber of the same size (or single) and a soundproof wall composed only of resonance holes, and therefore has a limit of only sounding the target frequency to be soundproofed.

Republic of Korea Utility Model Registration No. 20-0333023 Republic of Korea Patent Publication No. 10-1838264

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems, and an object thereof is to provide an empty hexahedral acoustic block having an opening formed at one side thereof.

As described above, the present invention can be constructed by stacking acoustic blocks having a hexahedron shape to form a masonry wall structure through which a soundproof wall can be constructed.

In order to achieve the above object, the soundproof wall according to a preferred embodiment of the present invention is constructed of an acoustic block having a box-shaped portion having a cavity therein and an opening formed in one surface of the box-shaped portion so as to communicate with the cavity portion, and the soundproof wall is a wind load. One or more air flow passages are provided in the wall constructed of the acoustic blocks so as to reduce the noise, and the soundproof wall is arranged so that the openings of the acoustic blocks defining the air flow passages are in communication with the air flow passages. Thus, the present invention can enter the air passage passage noise into the opening of the acoustic block communicating with the air passage passage can attenuate the noise by the resonance phenomenon.

The sound barrier according to the invention can be oriented so as to oppose the openings of the spaced apart acoustic blocks defining the air passage passages.

The acoustic block further includes one or more coupling protrusions protruding in the vertical direction from the top of the box-shaped portion to facilitate stacking installation, and additionally includes one or more coupling grooves at positions corresponding to the coupling protrusions on the bottom of the box-shaped portion. can do.

Preferably, the acoustic block is formed in a cube shape, the front wall and the rear wall spaced apart parallel to the front wall, the two side walls facing each other, the front wall and the rear facing each other connecting the ends of the front wall and the rear wall A box-shaped portion formed of a base wall wall disposed below the wall and both side walls, and a ceiling wall disposed above the base wall wall; An opening formed in the thickness direction in the inner region of the front wall; And a cavity defined by the front wall, the rear wall, both side walls, the base wall, and the ceiling wall and in fluid communication with the opening.

In particular, the soundproof wall constructed with the acoustic block according to the present invention may determine a specific frequency to be soundproofed by the acoustic block by Equation 1 below.

[Equation 1]

here,

V _ac Sound speed

; A₁ : 개구부 단면적, A₂ : 개구부와 대향되는 후면 벽의 내부 면적)P: aperture ratio (

; A ₁ : opening cross section, A ₂ : internal area of the rear wall opposite the opening)

W: longitudinal length of the cavity

t: thickness of the front wall,

d: effective diameter of opening

In addition, the soundproof wall constructed of the acoustic block according to the present invention may determine the maximum frequency of the sound insulation bandwidth of the acoustic block by Equation 2 below.

[Equation 2]

here,

V _ac Sound speed

; A₁ : 개구부 단면적, A₂ : 개구부와 대향되는 후면 벽의 내부 면적)P: aperture ratio (

; A ₁ : opening cross section, A ₂ : internal area of the rear wall opposite the opening)

W: longitudinal length of the cavity

t: thickness of the front wall,

d: effective diameter of opening

The features and advantages of the present invention will become more apparent from the following detailed description based on the accompanying drawings.

Prior to this, the terms or words used in the present specification and claims should not be interpreted in the ordinary and dictionary sense, and the inventors may appropriately define the concept of terms in order to best explain their own invention. It should be interpreted as meanings and concepts corresponding to the technical idea of the present invention based on the principle.

According to the description of the present invention, the acoustic block of the present invention is provided to control the sound insulation bandwidth by varying the size of the opening and the volume of the cavity.

The present invention can form a sound barrier by mixing a plurality of acoustic blocks having a variety of sound insulation bandwidth, thereby extending the sound insulation bandwidth to low, medium and high frequencies.

In particular, the present invention has the advantage that it is possible to more effectively sound off the noise generated from the noise source by calculating a specific frequency band to be soundproof before construction.

In addition, according to the present invention, the acoustic block may be formed into a rectangular parallelepiped or a cube shape, and thus may be easily and conveniently stacked and installed, thereby improving the construction and durability of the soundproof wall.

1 is a perspective view schematically showing a built state of an acoustic block according to a preferred embodiment of the present invention.
2 is a perspective view from above of an acoustic block according to a preferred embodiment of the present invention;
3 is a perspective view from below of an acoustic block according to a preferred embodiment of the present invention.
4 is a view schematically showing another example of an acoustic block according to the present invention.
5 is a state diagram used in the acoustic block according to an embodiment of the present invention.
6 is a state diagram in which the acoustic block according to the preferred embodiment of the present invention is constructed in another manner.
7 is a diagram illustrating the use of the acoustic block according to another embodiment of the present invention.
8 is a perspective view schematically showing an acoustic block according to another embodiment of the present invention.
9 is a perspective view schematically showing an acoustic block according to another embodiment of the present invention.

The objects, specific advantages and novel features of the present invention will become more apparent from the following detailed description and embodiments associated with the accompanying drawings. In the present specification, in adding reference numerals to the components of each drawing, it should be noted that the same components as possible, even if displayed on different drawings have the same number as possible. In addition, in describing the present invention, if it is determined that the detailed description of the related known technology may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted. In this specification, the terms first, second, etc. are used to distinguish one component from another component, and a component is not limited by the terms. In the accompanying drawings, some components are exaggerated, omitted, or schematically illustrated, and the size of each component does not fully reflect the actual size.

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

1 is a view schematically illustrating a soundproof wall 100 made of an acoustic block 1 according to a preferred embodiment of the present invention. In general, the soundproof wall 100 is disposed between a noise source and a sound absorbing point to detect noise generated from the noise source. Serves to reduce.

The soundproof wall 100 is installed at a predetermined interval to vertically stand a plurality of struts, and the acoustic block 1 according to the present invention is stacked between the plurality of struts in a stacked manner to form a wall structure. Can be formed. That is, the acoustic block 1 according to the preferred embodiment of the present invention has a simple structure in which an empty rectangular parallelepiped box-shaped part and an opening are formed on one surface of the box-shaped part so as to sound the noise of a specific frequency through a resonance phenomenon. Consists of a single component consisting of, the noise generated from the noise source through the opening 12 is incident to the interior of the acoustic block (1) while vibrating the internal air of the acoustic block to sound a certain frequency by the offset interference.

As described above, the acoustic block 1 according to the preferred embodiment of the present invention is formed to use a resonance phenomenon to sound a specific frequency (that is, a target frequency to be sounded), preferably in the present invention. The acoustic block 1 according to the present invention may be a unit container having an opening 12 and a cavity 13 containing a gas therein so as to cause Helmholtz resonance.

In particular, the acoustic block 1 according to the present invention is intended for sound insulation by controlling its own resonance frequency expressed as a function through parameters such as the size of the opening (section area, effective diameter), the volume of the cavity, the thickness of the front wall, and the like. The noise can be controlled by matching the target frequency. To this end, the acoustic block 1 according to the present invention has the advantage of obtaining a wide sound insulation bandwidth as possible by controlling the resonance frequency as a geometric characteristic.

2 to 3, an acoustic block 1 according to a preferred embodiment of the present invention is a front wall 11a, a rear wall 11b, side walls 11c, 11d, and a base wall wall 11e. It may be formed of a hollow box-shaped portion 11 (see Fig. 1) defined in hollow. Preferably, the box-shaped portion may be a cuboid shape or a cube shape. The box-shaped portion is connected to the front wall 11a and the rear wall 11b spaced in parallel with the front wall 11a, and both side walls facing each other while connecting both ends of the front wall 11a and the rear wall 11b. It may have a base wall 11e having 11c and 11d and disposed below the front wall 11a and the rear wall 11b and both side walls 11c and 11d.

Specifically, the present invention consists of a box-shaped portion having an open top, an opening 12 perforated in a thickness direction on one surface of the box-shaped portion, and a cavity 13 disposed inside the box-shaped portion 11, the cavity portion 13 may be disposed in fluid communication with the outside through the opening 12. The box-shaped portion 11 having the upper portion opened according to the present invention may be closed with a finishing frame (not shown) on the upper portion of the soundproof wall structure as shown in FIG. 1 to close the open surface of the box-shaped portion.

The acoustic block 1 according to the present invention is provided with one or more engaging projections 14 protruding vertically upward on the top of the box-shaped portion 11 so as to be stacked in the vertical direction as shown in FIG. The lower end of the (11) is provided with a coupling groove 15 formed concave in a position corresponding to the coupling projection to accommodate the coupling projection (14).

As is well known to those skilled in the art, since the acoustic block 1 of the present invention is soundproofed using a resonance phenomenon, the resonance frequency of the acoustic block 1 is independent of the shape of the box-shaped portion 11, It is determined by the volume of the portion 13, the cross-sectional area of the opening 12, the wall thickness of the opening 12 and the like. On the basis of this fact, the acoustic block 1 according to the preferred embodiment of the present invention differs in the volume of the cavity 13, the cross-sectional area of the opening 12, and the like from the low frequency band to the high frequency band to be soundproofed. Can be extended.

In particular, the acoustic block 1 according to the preferred embodiment of the present invention may be designed to determine a specific frequency (f _target ; or target frequency) to be sounded by Equation 1 below.

), W: 공동부의 세로폭 길이, t : 전면 벽의 두께, d : 개구부의 유효직경 이다. 참고로, A₁ : 개구부 단면적이고, A₂ : 개구부와 대향되는 후면 벽의 내부 면적(공동부의 가로폭 길이(L)×공동부의 높이 길이(H)) 이다. Where V _ac : Sound velocity, P: aperture ratio

), W: longitudinal length of cavity, t: thickness of front wall, d: effective diameter of opening. For reference, A _{1 is an} opening cross section, and A ₂ is an inner area of the rear wall facing the opening (width length L of the cavity part x height length H of the cavity part).

Based on Equation 1, the acoustic block 1 according to the preferred embodiment of the present invention is dependent on the volume (W × A ₂ ) and the aperture ratio (P) of the cavity 13 to be soundproof in a specific frequency band. Can be set. This makes it possible to form a wide frequency band by varying the volume, aperture ratio, etc. of the cavity in various sizes in the acoustic block, which is very useful in establishing sound insulation measures. For example, as the volume of the cavity increases and the aperture ratio decreases, the sound insulation bandwidth can effectively sound the low frequency region sound. In contrast, as the volume of the cavity decreases and the aperture ratio increases, the sound insulation bandwidth has a sound insulation effect on the sound in the (medium) high frequency region.

In other words, the specific frequency according to Equation 1 above can identify the frequency region to be soundproofed through the acoustic block 1 according to the preferred embodiment of the present invention.

Equation 2 below may identify the maximum frequency region of the sound insulation bandwidth through an acoustic block having the same size and the same shape shown in FIGS. 2 and 3.

In other words, the acoustic block according to the preferred embodiment of the present invention can calculate the minimum sound insulation frequency of [Equation 1] and the maximum sound insulation frequency of [Equation 2], whereby the acoustic block is possible through the acoustic block of the present invention. Bands can be more accurately calculated and confirmed.

In addition, the acoustic block 1 according to the preferred embodiment of the present invention may be made of metal, aluminum (non-metal), concrete, polymer, and may be any material that is not limited thereto and does not pass sound. To be selected, the acoustic block 1 according to the preferred embodiment of the present invention can be expected to absorb sound and vibration reduction effect by mounting a sound absorbing material (not shown) on the inner surface of the box-shaped portion (11). Sound absorbing material may be made of glass fiber, polyurethane and the like.

4 illustrates another example of an acoustic block with an open top including various types of openings 12 in one side wall of the box-shaped portion 11, ie the inner region of the front wall.

Fig. 4 (a) forms a slit-shaped opening on the front wall of the box-shaped portion, Fig. 4 (b) forms a circular opening on the front wall of the box-shaped portion, and Fig. 4 (c) shows the box-shaped portion. A rectangular opening is formed in the front wall of the. The acoustic block according to the present invention can form various types of openings in the front wall of the box-shaped portion as shown, and only one opening is illustrated in the figure, but the equation [Equation 1] and / or [ One or more openings may be drilled according to Equation 2].

5 is a state of use of the acoustic block according to a preferred embodiment of the present invention, a plurality of acoustic blocks (1) can be alternately arranged in a vertical direction or a horizontal direction to the wall structure as shown in FIG. .

By mixing the small volume acoustic block according to the present invention and the large volume acoustic block according to the present invention, the sound insulation bandwidth can be extended to eliminate a wide range of noise frequencies. In other words, the present invention can reduce the noise of a specific frequency soundable through each acoustic, it can be configured to reduce the noise in various frequency bands by varying the size of the parameters in each acoustic. As shown, the small volume acoustic block can be constructed as a soundproof wall of a wall having a constant width and thickness by having the same width as the large volume acoustic block through the support block (not indicated).

FIG. 6 is a state in which the acoustic block according to the preferred embodiment of the present invention is constructed in another manner, and a plurality of acoustic blocks may be stacked to form the soundproof wall 200. In particular, the soundproof wall 200 is provided with one or more air guide passages 210 in the wall to reduce the wind load acting by the wind, such as strong winds. The air passage passage 210 may be disposed in the soundproof wall inner region so as to forcibly guide the wind blowing toward the front side of the soundproof wall to the rear side across the soundproof wall.

The soundproof wall 200 arranges the acoustic blocks 1 spaced apart from each other and orients the openings 12 of the acoustic blocks 1 to face each other, thereby providing an air passage path between the acoustic blocks 1. 210 may be formed. As described above, the wind enters the air passage passage 210 together with the noise, and the noise is introduced into the opening 12 of the acoustic block 1 in communication with the air passage passage 210 and the noise is caused by resonance. Can be attenuated.

The acoustic block 1 of the present invention is formed in a rectangular parallelepiped shape as shown in the figure, and is not only easy to be stacked in a wall structure, but also has an advantage of being easily arranged in various patterns as shown in FIGS. 1 and 6.

FIG. 7 is a mixed structure of the acoustic block according to the preferred embodiment of the present invention, which is illustrated in FIG. 1 and the construction method illustrated in FIG. 6. The acoustic block is not only laminated and installed, but also with durability through wind load reduction. It can also provide beauty.

8 is a perspective view schematically showing an acoustic block according to another embodiment of the present invention. The acoustic block illustrated in FIG. 8 is another modification of the acoustic block illustrated in FIG. 2, and has a very similar structure except for the ceiling surface of the box-shaped portion, and thus is similar or identical for the sake of clarity. The description of the configuration will be excluded here.

The acoustic block according to another embodiment of the present invention has a hollow hollow defined by the front wall 11a, the rear wall 11b, the side walls 11c and 11d, the base wall 11e, and the ceiling wall 11f. The rectangular parallelepiped box-shaped part 11 is provided, and the box-shaped part 11 is equipped with the base wall wall 11e and the ceiling wall 11f which face each other.

In addition, the acoustic block according to another embodiment of the present invention is an opening 12 perforated in a thickness direction in one area of the box-shaped portion 11, for example, the front wall 11a, and a cavity disposed inside the box-shaped portion ( 13) is provided in fluid communication.

Acoustic blocks according to another embodiment of the present invention can be installed in a vertical direction more easily due to the geometric shape and is closed to the upper portion of the component member such as a separate frame for limiting the cavity 13 with durability It does not need to have the advantage of significantly lowering the work maneuver.

9 is an acoustic block according to another embodiment of the present invention may further include an inner tube (16) in the opening 12 of the box-shaped portion (11). The inner tube 16 may extend lengthwise around the circumference of the opening 12 toward the interior space of the cavity 13 as shown.

In general, the resonance phenomenon of Helmholtz is known to be able to adjust the resonance frequency according to the inlet length of the opening (that is, the thickness t of the front wall + the length of the inner tube). Thus, the acoustic block according to another embodiment of the present invention can adjust the length of the inner tube 16 short or long to set a specific frequency to be sounded more effectively and precisely. In addition, the inner tube 16 extends into the space 13 of the box-shaped portion 11 so as to simplify the external shape of the box-shaped portion. Such an arrangement of inter tubes has the advantage of not disturbing the air guide passage 210 formed between a pair of acoustic blocks spaced apart from each other in FIG. 6, for example.

Although the present invention has been described in detail by way of examples, this is for explaining the present invention in detail, and the soundproof wall constructed by the acoustic block according to the present invention is not limited thereto. It is clear that modifications and improvements are possible by those with knowledge of the world.

All simple modifications and variations of the present invention fall within the scope of the present invention, and the specific scope of the present invention will be apparent from the appended claims.

1 ----- acoustic block,
11 ----- box shape,
12 ----- opening,
13 ----- joint department,
14 ----- engaging projection,
15 ----- coupling groove,
16 ----- inner tube,
100, 200 ----- soundproof wall.

Claims (6)

In the soundproof wall including the acoustic block (1),
The acoustic wall includes the box-shaped portion 11 having a cavity 13 therein and the acoustic block 1 having an opening 12 formed in one surface of the box-shaped portion 11 so as to communicate with the cavity 13. )
The soundproof wall is provided with at least one air flow path passage 210 in the wall constructed by the acoustic block (1) to reduce the wind load,
The soundproof wall arranges the opening 12 of the acoustic block defining the air flow passage so as to communicate with the air flow passage 210.
Here, the noise entering the air passage passage is introduced into the opening 12 of the acoustic block in communication with the air passage passage 210 can be attenuated by the resonance phenomenon, the acoustic block, Constructed soundproof walls.
The method according to claim 1,
And the air passage passage 210 is oriented so as to face each other with the openings 12 of the spaced apart acoustic blocks defining the air passage passage.
The method according to claim 1,
The box-shaped portion 11 is further provided with one or more coupling protrusions 14 protruding in the vertical direction from the top,
The box-shaped portion (11) is characterized in that it further comprises one or more coupling grooves (15) in a position corresponding to the coupling projection (14) at the lower end of the box-shaped portion, soundproof wall constructed by an acoustic block.
The method according to claim 1,
The acoustic block 1 is formed in a cube shape,
A front wall 11a, a rear wall 11b spaced apart in parallel with the front wall 11a, and both side walls facing each other while connecting both ends of the front wall 11a and the rear wall 11b. 11c and 11d, a base wall 11e disposed below the front wall 11a and the rear wall 11b, and both side walls 11c and 11d, and an upper portion facing the base wall wall 11e. The box-shaped portion (11) formed of the arranged ceiling wall (11f);
The opening 12 formed in the thickness direction in the inner region of the front wall 11a; And
The front wall 11a, the rear wall 11b, both side walls 11c and 11d, the base wall 11e, and the ceiling wall 11f, and are in fluid with the opening 12 The cavity 13 is in communication; characterized in that consisting of, the soundproof wall constructed of an acoustic block.
The method according to claim 4,
A specific frequency to be soundproofed of the acoustic block (1) is characterized in that determined by the following [Equation 1], the soundproof wall constructed by the acoustic block.
[Equation 1]

here,
V _ac Sound speed
P: aperture ratio (

; A ₁ : opening cross section, A ₂ : internal area of the rear wall opposite the opening)
W: longitudinal length of the cavity
t: thickness of the front wall,
d: effective diameter of opening
The method according to claim 4,
The maximum frequency of the sound insulation bandwidth of the acoustic block (1) is characterized in that determined by the following [Equation 2], the soundproof wall constructed by the acoustic block.
[Equation 2]

here,
V _ac Sound speed
P: aperture ratio (

; A ₁ : opening cross section, A ₂ : internal area of the rear wall opposite the opening)
W: longitudinal length of the cavity
t: thickness of the front wall,
d: effective diameter of opening

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