KR20240053708A - Ceiling structure for blocking noise between floors - Google Patents

Abstract

One embodiment of the present invention provides a ceiling structure for blocking inter-floor noise that can effectively reduce inter-floor noise. Here, the ceiling structure for blocking noise between floors is installed between the slab that divides each floor of the building and the ceiling finishing material that is coupled to the ceiling frame installed at the bottom of the slab to form the ceiling of the lower floor, and is the first sound insulation unit. and a second sound insulation unit. The first sound insulation unit is placed in contact with the lower surface of the slab and blocks noise transmitted through the slab. The second blocking unit is provided in the ceiling space formed between the slab and the ceiling finishing material, and blocks noise transmitted through the ceiling space. The second sound insulation unit is arranged to be spaced apart from the first sound insulation unit and the ceiling finishing material.

Description

Ceiling structure for blocking noise between floors {CEILING STRUCTURE FOR BLOCKING NOISE BETWEEN FLOORS}

The present invention relates to a ceiling structure for blocking inter-floor noise, and more specifically, to a ceiling structure for blocking inter-floor noise that can effectively reduce inter-floor noise.

In general, each floor in a building is divided by a reinforced concrete slab, and a piping layer with lightweight fillers and heating pipes is installed on the upper part of the slab. A hanger is installed on the lower part of the slab, and a gypsum board is installed on the slab. is assembled to form the ceiling of the lower floor.

However, in this type of floor structure in apartments and other apartments, floor impact sounds are easily transmitted to the lower floors, so noise disputes between households between floors continue.

To solve this problem, methods are being explored to construct a lightweight foamed concrete layer or cushioning material during floor construction. However, this may cause light impact noise from walking on the floor or dragging a chair, as well as children running on the floor or dropping objects. The effect of reducing the weight impact noise generated when using a vehicle is low.

Therefore, in some households, in order to reduce floor impact noise, soundproofing sheets made of urethane or rubber with excellent soundproofing properties are purchased separately and placed on the floor.

Therefore, there is an urgent need to improve fundamental inter-floor noise and shock insulation.

Republic of Korea Patent Publication No. 2226686 (announced on March 11, 2021)

In order to solve the above problems, the technical problem to be achieved by the present invention is to provide a ceiling structure for blocking inter-floor noise that can effectively reduce inter-floor noise.

The technical problem to be achieved by the present invention is not limited to the technical problem mentioned above, and other technical problems not mentioned can be clearly understood by those skilled in the art from the description below. There will be.

In order to achieve the above technical problem, one embodiment of the present invention is installed between a slab dividing each floor of a building and a ceiling finishing material that is coupled to a ceiling frame installed at the bottom of the slab to form the ceiling of the lower floor. A ceiling structure for blocking noise between floors, comprising: a first sound insulation unit disposed in contact with the lower surface of the slab and blocking noise transmitted through the slab; and a second sound-insulating unit provided in a ceiling space formed between the slab and the ceiling finishing material and blocking noise transmitted through the ceiling space, wherein the second sound-insulating unit includes the first sound-insulating unit and the Provides a ceiling structure for blocking noise between floors, which is arranged to be spaced apart from the ceiling finishing material.

In an embodiment of the present invention, the first sound insulation unit may have a sound-absorbing material installed under the slab and a first sound-insulating plate installed under the sound-absorbing material.

In an embodiment of the present invention, the first sound insulation plate includes a pattern frame having a central pattern area and a plurality of peripheral pattern areas separated from the central pattern area by a separation bar and disposed around the central pattern area, and an air It is installed to block the path in which air travels, converts sound waves in the air into elastic waves, and includes an elastic film mounted on the pattern frame, and the displacement of the elastic film in the central pattern area at a resonant frequency equal to the frequency of the noise to be blocked and Displacements of the elastic films within the peripheral pattern area may be opposite to each other.

In an embodiment of the present invention, the sum of the area of the central pattern area and the areas of the plurality of peripheral pattern areas may be equal.

In an embodiment of the present invention, a plurality of first sound insulating plates are provided in a grid shape on the sound absorbing material, and among the plurality of first sound insulating plates, adjacent first sound insulating plates with respect to the sides have different resonance frequencies. It can be arranged as follows.

In an embodiment of the present invention, a plurality of first sound insulating plates are provided in a grid shape on the sound absorbing material, and a first sound insulating plate having a relatively low resonance frequency among the plurality of first sound insulating plates is provided in the central area of the sound absorbing material. A plate may be disposed, and a first sound insulating plate having a relatively high resonance frequency among the plurality of first sound insulating plates may be disposed in an edge area of the sound absorbing material.

In an embodiment of the present invention, the sound-absorbing material is porous and can absorb vortices generated in the space between the first sound-insulating plate and the slab due to vibration of the first sound-insulating plate.

In an embodiment of the present invention, the second sound insulation unit includes an upper space formed between the ceiling space and the slab and the second sound insulation unit, and a lower space formed between the second sound insulation unit and the ceiling finishing material. By dividing it into parts, the resonant frequency of the upper space and the resonant frequency of the lower space can be made to have a higher frequency than the resonant frequency of the ceiling space.

In an embodiment of the present invention, the second sound insulating unit has a second sound insulating plate, and the second sound insulating plate is separated from the central pattern area by a central pattern area and a separation bar and is disposed around the central pattern area. A pattern frame having a plurality of peripheral pattern areas, installed to block the path of air, converting sound waves of the air into elastic waves, and an elastic membrane mounted on the pattern frame, the frequency of the noise to be blocked and At the same resonance frequency, the displacement of the elastic film in the central pattern area and the displacement of the elastic film in the peripheral pattern area may be opposite to each other.

In an embodiment of the present invention, the sum of the area of the central pattern area and the areas of the plurality of peripheral pattern areas may be equal.

In an embodiment of the present invention, the second sound insulation plate may have a resonance frequency that is the same as the frequency of noise in the upper space.

In an embodiment of the present invention, the second sound insulation plate may be arranged to have a volume such that the lower space has a target frequency equal to the resonance frequency of the ceiling finishing material.

In an embodiment of the present invention, a plurality of second sound insulating plates are provided in a grid shape on the ceiling frame, and among the plurality of second sound insulating plates, adjacent second sound insulating plates with respect to the sides have different resonance frequencies. It can be arranged to have.

In an embodiment of the present invention, a plurality of second sound insulating plates are provided in a grid shape on the ceiling frame, and a second sound insulating plate having a relatively low resonance frequency among the plurality of second sound insulating plates is disposed in the central area. And, among the plurality of second sound insulating plates, a second sound insulating plate having a relatively high resonance frequency may be disposed in the edge area.

According to an embodiment of the present invention, a first sound insulating unit having a sound absorbing material and a first sound insulating plate is provided at the lower part of the slab to block noise from the slab, and a second sound insulating unit is provided on the upper side of the ceiling finishing material to protect the ceiling space. By dividing the space, noise from the ceiling space can be blocked by the second sound insulation unit and the ceiling finishing material, thereby effectively blocking or reducing noise between floors.

The effects of the present invention are not limited to the effects described above, and should be understood to include all effects that can be inferred from the configuration of the invention described in the detailed description or claims of the present invention.

Figure 1 is an exemplary diagram showing a ceiling structure for blocking noise between floors according to an embodiment of the present invention.
Figure 2 is an exemplary diagram showing a first sound insulation plate in a ceiling structure for blocking inter-floor noise according to an embodiment of the present invention.
Figure 3 is an exemplary diagram for explaining the principle of the first sound insulation plate in the ceiling structure for blocking inter-floor noise according to an embodiment of the present invention.
Figure 4 is an exemplary diagram illustrating a first sound insulation unit in a ceiling structure for blocking noise between floors according to an embodiment of the present invention.
Figure 5 is an example diagram showing the shape in which the central pattern area and peripheral pattern area of the first sound insulation plate have different sizes in a ceiling structure for blocking inter-floor noise according to an embodiment of the present invention.
Figure 6 is an exemplary diagram showing uneven portions on the first sound insulation plate in a ceiling structure for blocking inter-floor noise according to an embodiment of the present invention.
Figure 7 is an exemplary diagram for explaining an example of the arrangement of a first sound insulation plate in a ceiling structure for blocking inter-floor noise according to an embodiment of the present invention.
Figure 8 is an exemplary diagram for explaining a second sound insulation unit in a ceiling structure for blocking noise between floors according to an embodiment of the present invention.
Figure 9 is a graph showing the performance results of a ceiling structure for blocking inter-floor noise according to an embodiment of the present invention.

Hereinafter, the present invention will be described with reference to the attached drawings. However, the present invention may be implemented in various different forms and, therefore, is not limited to the embodiments described herein. In order to clearly explain the present invention in the drawings, parts unrelated to the description are omitted, and similar parts are given similar reference numerals throughout the specification.

Throughout the specification, when a part is said to be "connected (connected, contacted, combined)" with another part, this means not only "directly connected" but also "indirectly connected" with another member in between. "Includes cases where it is. Additionally, when a part is said to “include” a certain component, this does not mean that other components are excluded, but that other components can be added, unless specifically stated to the contrary.

The terms used in this specification are merely used to describe specific embodiments and are not intended to limit the invention. Singular expressions include plural expressions unless the context clearly dictates otherwise. In this specification, terms such as “comprise” or “have” are intended to designate the presence of features, numbers, steps, operations, components, parts, or combinations thereof described in the specification, but are not intended to indicate the presence of one or more other features. It should be understood that it does not exclude in advance the possibility of the existence or addition of elements, numbers, steps, operations, components, parts, or combinations thereof.

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

Figure 1 is an exemplary diagram showing a ceiling structure for blocking noise between floors according to an embodiment of the present invention.

As shown in Figure 1, the ceiling structure for blocking noise between floors is combined with the slab 20 that divides each floor of the building and the ceiling frame 30 installed at the lower part of the slab 20 to form the ceiling of the lower floor. It is installed between the ceiling finishing materials 40 and may include a first sound insulation unit 100 and a second sound insulation unit 200.

Here, the slab 20 is connected to the exterior wall 10 of the building to partition each floor, and may be a reinforced concrete slab, and becomes the floor of the floor formed on the upper side.

And, the ceiling frame 30 may have a hanger 31 and a horizontal bar 32. The hanger 31 has an upper end coupled to the lower part of the slab 20 and extends downward. The horizontal bar 32 is coupled to the lower end of the hanger 31 and arranged horizontally.

The ceiling finishing material 40 is coupled to the lower part of the horizontal bar 32 to form the ceiling of the lower floor. The ceiling finishing material 40 may be, for example, gypsum board.

A ceiling space 50 is formed between the slab 20 and the ceiling finishing material 40, and the first sound insulation unit 100 and the second sound insulation unit 200 may be installed in the ceiling space 50. .

In detail, the first sound insulation unit 100 may have a sound absorption material 110 and a first sound insulation plate 120.

The sound absorbing material 110 may be installed in contact with the lower surface of the slab 20. The sound-absorbing material 110 may be made of a porous material and may be formed to allow air to pass through. For example, sponge, felt, etc. may be used as the sound absorbing material 110.

The first sound insulation plate 120 may be installed below the sound absorbing material 110 and can block noise transmitted through the slab 20.

Figure 2 is an exemplary diagram showing the first sound insulation plate in the ceiling structure for blocking inter-floor noise according to an embodiment of the present invention, and Figure 3 is an exemplary diagram showing the first sound insulation plate in the ceiling structure for blocking inter-floor noise according to an embodiment of the present invention. This is an example diagram to explain the principle of a sound insulation board.

As shown in Figures 2 and 3, the first sound insulation plate 120 is intended to block noise and may include a pattern frame 121 and an elastic film 126.

The pattern frame 121 may include a central pattern area 122 and a plurality of peripheral pattern areas 123.

An outer frame 125 is formed at the edge of the pattern frame 121, and a central pattern area 122 and a plurality of peripheral pattern areas 123 may be formed inside the outer frame 125.

The central pattern area 122 is located in the center of the pattern frame 121. The central pattern area 122 is surrounded by a separation bar 124 and is an area formed to penetrate along the direction of air movement.

A plurality of peripheral pattern areas 123 are provided and each is arranged around the central pattern area 122. The peripheral pattern area 123 is formed to be separated from the central pattern area 122 by a separation bar 124, and, like the central pattern area 122, is an area formed to penetrate along the direction of air movement.

The central pattern area 122 of this embodiment may be formed in a square shape among polygonal shapes, and the peripheral pattern area 123 may be formed in a triangular shape and arranged to contact each side of the central pattern area 122.

The pattern frame 121 may be made of plastic materials such as polypropylene (PP), polycarbonate (PC), acetal, acrylic, and acrylonitrile-butadien-styrene (ABS).

The elastic membrane 126 is installed to block the path of air, converts sound waves in the air into elastic waves, and is mounted on the pattern frame 121.

The elastic membrane 126 may be made of materials such as low-density polyethylene (LDPE), polyurethane (PU), polyethylene terephthalate (PET), polypropylene (PP), and latex. You can.

In the case of the first sound insulation plate 120 of this embodiment, a plurality of pattern frames 121 are provided, and the pattern frames 121 may be mounted on one side and the other side of the elastic membrane 126, respectively.

Referring to FIG. 3, at the resonance frequency of the first sound insulation plate 120, the displacement of the elastic film 126a in the central pattern area and the displacement of the elastic film 126b in the peripheral pattern area are opposite to each other. At this time, the first sound insulation plate 120 is designed to have a resonance frequency that is the same as the target frequency of the noise to be blocked.

For example, at a certain moment in the resonance frequency band of the first sound insulation plate 120, the displacement of the elastic film 126b in the peripheral pattern area is formed toward the air moving direction A, and the elastic film 126b in the central pattern area is formed. The displacement of (126a) may be formed in a direction opposite to the direction of air movement (A). At the next moment, the displacement of the elastic film 126b in the peripheral pattern area is formed in the direction opposite to the direction A of the air, and the displacement of the elastic film 126a in the central pattern area is in the direction A of the air. can be formed towards

In this way, when the displacement of the elastic film 126a in the central pattern area has a positive displacement in the direction A of the air, the displacement of the elastic film 126b in the peripheral pattern area has a negative displacement, and the displacement of the elastic film 126b in the peripheral pattern area has a negative displacement, When the displacement of the elastic film 126a in the central pattern area toward the traveling direction A has a negative displacement, the displacement of the elastic film 126b in the peripheral pattern area has a positive displacement, and a resonance mode is repeated.

As the displacement of the elastic film 126a in the central pattern area and the displacement of the elastic film 126b in the peripheral pattern area are opposite to each other, the elastic film 126 is an average of the displacements at the local positions of the elastic film 126. )'s effective displacement can be close to zero.

When the effective displacement of the elastic film 126 becomes zero, a phenomenon occurs in which almost no sound wave energy of air is transmitted through the elastic film 126, and as a result, noise in the target frequency band is transmitted through the elastic film 126. It can be blocked without being transmitted downstream.

The phenomenon in which the effective displacement of the elastic membrane 126 approaches almost zero is expressed as the effective density of air being maximized. When the effective density of air is maximized, sound waves react as if the first sound insulation plate 120 is a very heavy wall, thereby As the sound waves that reach the primary sound insulation plate 120 are reflected, the transmission of the sound waves can be blocked.

At this time, it is preferable that the sum of the area of the central pattern area 122 and the area of the plurality of peripheral pattern areas 123 are substantially equal. This is because in order for the effective displacement of the elastic membrane 126 to be zero, the area with positive displacement and the area with negative displacement must be substantially equal.

The resonance frequency of the first sound insulation plate 120 can be adjusted by changing the pattern of the pattern frame 121, the thickness and tension of the elastic film 126, etc.

Additionally, the resonance frequency of the first sound insulation plate 120 may be set to correspond to the noise caused by the structure of the slab 20 (Structure Borne Noise). That is, the slab 20 itself may function as a chamber, and therefore may have a unique resonance frequency (f1, see FIG. 4) of the slab, and the first sound insulation plate 120 is the slab 20. By forming a unique resonance frequency, that is, a resonance frequency corresponding to the target frequency, noise transmitted through the slab 20 can be blocked.

Figure 4 is an exemplary diagram illustrating a first sound insulation unit in a ceiling structure for blocking noise between floors according to an embodiment of the present invention.

First, (a) of FIG. 4 shows a case where the first sound insulation unit 100 is made up of only the first sound insulation plate 120 without the sound absorbing material 110. As described above, the first sound insulation plate 120 Since the elastic film 126a in the central pattern area and the elastic film 126b in the peripheral pattern area can be repeatedly deformed while having opposite displacements, the slab 20 and the slab 20 are separated by vibration of the elastic films 126a and 126b. A vortex B may occur in the narrow space between the first sound insulation plates 120. Since this vortex B may change the frequency of the noise from the slab 20, the sound insulation effect of the first sound insulation plate 120 may be reduced.

However, as shown in (b) of FIG. 4, when the porous sound-absorbing material 110 is disposed between the slab 20 and the first sound-insulating plate 120, air flows into the sound-absorbing material when the elastic membranes 126a and 126b vibrate. You can go to (110). Then, the sound-absorbing material 110 can absorb the eddy current generated by the vibration of the elastic membranes 126a and 126b. In this way, when the sound absorbing material 110 absorbs the eddy current, there is no change in the frequency of the noise from the slab 20, and the sound insulation effect of the first sound insulation plate 120 can be improved.

Figure 5 is an example diagram showing the shape in which the central pattern area and peripheral pattern area of the first sound insulation plate have different sizes in a ceiling structure for blocking inter-floor noise according to an embodiment of the present invention.

As shown in Figures 2 and 5, a plurality of first sound insulating plates may be provided in a grid shape on sound absorbing material. Additionally, the size of the pattern frame can be adjusted depending on the target frequency band of the slab noise to be blocked.

When the shape shown in (a) of FIG. 2 is considered to be a unit cell of the first sound insulation plate, as shown in (a) of FIG. 5, when the target frequency of the slab noise to be blocked is relatively low, the cell (C1) Since the length d1 of one side is relatively long, the size of the cell C1 can be made relatively large.

On the other hand, as shown in (b) of Figure 5, when the target frequency of the slab noise to be blocked is relatively high, the length (d2) of one side of the cell (C2) is formed relatively short, thereby reducing the size of the cell (C2). can be formed small.

At this time, it is desirable that the size of the central pattern areas (122a, 122b) and the size of the peripheral pattern areas (123a, 123b) vary in proportion to the size of the pattern frames (121a, 121b).

Figure 6 is an exemplary diagram showing uneven portions on the first sound insulation plate in a ceiling structure for blocking inter-floor noise according to an embodiment of the present invention.

As shown in FIG. 6, the pattern frame 121 may further include a plurality of uneven portions 127 formed on the edge. In this case, since neighboring pattern frames 121 can be coupled to each other by the uneven portion 127, multiple pattern frames 121 can be easily coupled to each other through the uneven portion 127, and the first The sound insulation plate 120 can be manufactured in a large area.

Figure 7 is an exemplary diagram for explaining an example of the arrangement of a first sound insulation plate in a ceiling structure for blocking inter-floor noise according to an embodiment of the present invention.

When a plurality of first sound insulation plates arranged in a matrix all have the same resonant frequency, specific frequencies can be transmitted well. In other words, when the plurality of first sound insulation plates has uniformity, a specific resonance sound can be transmitted well.

In order to prevent this, as shown in (a) of FIG. 7, neighboring first sound insulating plates 120a and 120b with respect to the side E are arranged to have different resonance frequencies. It can be.

Accordingly, among the plurality of first sound insulating plates 120a and 120b, first sound insulating plates disposed in the horizontal and vertical directions may be arranged to have different resonance frequencies.

On the other hand, among the plurality of first sound insulating plates 120a and 120b, neighboring first sound insulating plates based on the vertex F, that is, first sound insulating plates arranged diagonally, may be arranged to have the same resonance frequency. .

Alternatively, as shown in (b) of FIG. 7, a first sound insulating plate 120a having a relatively low resonance frequency among the plurality of first sound insulating plates is disposed in the central area G of the sound absorbing material, and the edge of the sound absorbing material Among the plurality of first sound insulating plates, a first sound insulating plate 120b having a relatively high resonance frequency may be disposed in the area H.

The edge of the slab connected to the exterior wall of the building may have a smaller amplitude than the center of the slab, and therefore relatively high frequency vibration may occur.

Therefore, the first sound insulation plate 120a having a relatively low resonance frequency is disposed in the central area of the slab and the first sound insulation plate 120b having a relatively high resonance frequency is disposed in the edge area of the slab, so that the slab Noise from the environment can be blocked more effectively.

Referring again to FIGS. 1 to 3, the second sound insulation unit 200 may be provided in the ceiling space 50 formed between the slab 20 and the ceiling finishing material 40, and the ceiling space 50 Noise transmitted through can be blocked.

And the second sound insulation unit 200 may have a second sound insulation plate. Here, the second sound insulating plate is the same as the first sound insulating plate 120, and further description is omitted. Hereinafter, the second sound insulation unit 200 and the second sound insulation plate may be used with the same meaning.

The second sound insulation unit 200 may be arranged to be spaced apart from the first sound insulation unit 100 and the ceiling finishing material 40.

To this end, the second sound insulation unit 200 may be provided horizontally on the upper part of the horizontal bar 32, and through this, the second sound insulation unit 200 may be spaced apart from the ceiling finishing material 40.

The second sound insulation unit 200 includes the ceiling space 50 with an upper space 51 formed between the slab 20 and the second sound insulation unit 200, the second sound insulation unit 200, and the ceiling finishing material ( It can be divided by a lower space 52 formed between 40). Accordingly, the resonance frequency of the upper space 51 and the resonance frequency of the lower space can be made to be higher than the resonance frequency of the ceiling space 50.

Figure 8 is an exemplary diagram for explaining a second sound insulation unit in a ceiling structure for blocking noise between floors according to an embodiment of the present invention.

As shown in (a) of FIG. 8, when there is no second sound insulation unit 200, the resonance frequency of the ceiling space 50 is affected by noise caused by air filled in the ceiling space 50. can be responded to. The ceiling space 50 itself may function as a chamber, and therefore may have a resonance frequency (f2) unique to the ceiling space. The inherent resonance frequency (f2) of the ceiling space may be smaller than the resonance frequency (f1) of the slab.

For example, in the case where the ceiling finishing material 40 is gypsum board, gypsum board has a relatively high sound insulating effect for high frequencies due to the rigidity of the gypsum board, but has a low sound insulating effect for low frequencies. However, since the resonance frequency f2 of the ceiling space 50 has a low-frequency noise that is smaller than the resonance frequency f1 of the slab, the sound insulation effect of the ceiling finishing material 40 may be low.

Meanwhile, when the second sound insulation unit 200 divides the ceiling space 50 into an upper space 51 and a lower space 52, the upper space 51 has a new resonance frequency f3. And the lower space 52 may also have a new resonance frequency (f4).

Additionally, the resonance frequency f3 of the upper space 51 and the resonance frequency f4 of the lower space 52 may be greater than the resonance frequency f2 of the ceiling space 50. Accordingly, high-frequency noise higher than that in the ceiling space 50 may be transmitted in the upper space 51 and the lower space 52.

The second sound insulation unit 200 may be formed to have a resonance frequency equal to the frequency of the noise in the upper space 51, and through this, the second sound insulation unit 200 transmits the noise from the upper space 51. It can effectively block noise.

In addition, it is desirable that the noise in the lower space 52 be blocked by the ceiling finishing material 40, and for this purpose, the second sound insulation unit 200 is designed so that the lower space 52 is blocked by the ceiling finishing material 40. It can be arranged to be formed in a volume that has a target frequency equal to the resonance frequency of .

That is, when the material of the ceiling finishing material 40 is confirmed and the resonance frequency of the ceiling finishing material 40 is confirmed, the volume of the lower space 52 to have a frequency corresponding to the resonance frequency can be calculated. Then, the second sound insulation unit 200 can be placed at a height so that the lower space 52 has the calculated volume.

And, when the placement position of the second sound insulation unit 200 is calculated, the volume of the upper space 51 can also be calculated, and therefore the resonance frequency of the upper space 51 can also be calculated. Then, the second sound insulation plate can be manufactured to have a resonance frequency corresponding to the noise frequency in the upper space 51.

Figure 9 is a graph showing the performance results of a ceiling structure for blocking inter-floor noise according to an embodiment of the present invention.

Here, the first sound insulation board was formed with a thickness of 6.5 mm, a density of 230 kg/㎥, and an area density of 1500 gsm, and the second sound insulation board was formed with a thickness of 2.5 mm, a density of 270 kg/㎥, and an area density of 850 gsm, and the ceiling finishing material was plaster. It was a board with a thickness of 9.5 mm, a density of 5650 kg/㎥, and a surface density of 5370 gsm. And, the slab was a reinforced concrete slab with a thickness of 150 mm.

As shown in Figure 9 (a), in the ceiling structure (S1) in which the first sound insulation unit, the second sound insulation unit and the ceiling finishing material are not installed, and the ceiling structure (S2) for blocking inter-floor noise according to the present invention, Comparing when a weight impact sound is applied to the slab, it can be seen that the sound pressure level (SPL: Sound Pressure Level) is lower in S2 than in S1.

And, as shown in Figure 9 (b), a ceiling structure (S1) in which the first sound insulation unit, the second sound insulation unit, and the ceiling finishing material are not installed, and a ceiling structure (S2) for blocking noise between floors according to the present invention. Even when comparing the case when light impact sound is applied to the slab, it can be seen that the sound pressure level (SPL) is lower in S2 than in S1, and through this, in the ceiling structure for blocking interfloor noise according to the present invention, interfloor noise is reduced. It can be seen that it can be effectively reduced.

The description of the present invention described above is for illustrative purposes, and those skilled in the art will understand that the present invention can be easily modified into other specific forms without changing the technical idea or essential features of the present invention. will be. Therefore, the embodiments described above should be understood in all respects as illustrative and not restrictive. For example, each component described as single may be implemented in a distributed manner, and similarly, components described as distributed may also be implemented in a combined form.

The scope of the present invention is indicated by the claims described below, and all changes or modified forms derived from the meaning and scope of the claims and their equivalent concepts should be construed as being included in the scope of the present invention.

20: Slab
40: Ceiling finishing material
50: Ceiling space part
51: upper space
52: lower space part
100: 1st sound insulation unit
110: Sound absorbing material
120: First sound insulation plate
200: Second sound insulation unit

Claims (14)

A ceiling structure for blocking noise between floors installed between a slab that divides each floor of a building and a ceiling finishing material that is coupled to a ceiling frame installed below the slab to form the ceiling of the lower floor, comprising:
A first sound insulation unit disposed in contact with the lower surface of the slab and blocking noise transmitted through the slab; and
It is provided in a ceiling space formed between the slab and the ceiling finishing material, and includes a second sound insulation unit that blocks noise transmitted through the ceiling space,
A ceiling structure for blocking inter-floor noise, wherein the second sound insulation unit is arranged to be spaced apart from the first sound insulation unit and the ceiling finishing material. According to paragraph 1,
The first sound insulation unit is
A sound-absorbing material installed at the lower part of the slab,
A ceiling structure for blocking inter-floor noise, characterized in that it has a first sound insulating plate installed below the sound absorbing material. According to paragraph 2,
The first sound insulation plate is
A pattern frame having a central pattern area and a plurality of peripheral pattern areas separated from the central pattern area by a separation bar and arranged around the central pattern area,
It is installed to block the path of air, converts sound waves of air into elastic waves, and includes an elastic membrane mounted on the pattern frame,
A ceiling structure for blocking inter-floor noise, wherein at a resonant frequency that is the same as the frequency of the noise to be blocked, the displacement of the elastic film in the central pattern area and the displacement of the elastic film in the peripheral pattern area are opposite to each other. According to paragraph 3,
A ceiling structure for blocking noise between floors, wherein the sum of the area of the central pattern area and the area of the plurality of peripheral pattern areas is equal. According to paragraph 3,
A plurality of first sound insulating plates are provided in a grid shape on the sound absorbing material, and among the plurality of first sound insulating plates, adjacent first sound insulating plates based on sides are arranged to have different resonance frequencies. Ceiling structure to block noise. According to paragraph 3,
A plurality of first sound insulating plates are provided in a grid shape on the sound absorbing material, and a first sound insulating plate having a relatively low resonance frequency among the plurality of first sound insulating plates is disposed in the central area of the sound absorbing material, and an edge of the sound absorbing material. A ceiling structure for blocking inter-floor noise, characterized in that a first sound insulating plate having a relatively high resonance frequency among the plurality of first sound insulating plates is disposed in the area. According to paragraph 2,
The sound-absorbing material is porous and absorbs vortices generated in the space between the first sound-insulating plate and the slab due to vibration of the first sound-insulating plate. A ceiling structure for blocking inter-floor noise. According to paragraph 1,
The second sound insulation unit is
The ceiling space is divided into an upper space formed between the slab and the second sound insulation unit and a lower space formed between the second sound insulation unit and the ceiling finishing material, and the resonance frequency of the upper space and the lower space are determined. A ceiling structure for blocking inter-floor noise, characterized in that the negative resonance frequency is higher than the resonance frequency of the ceiling space. According to clause 8,
The second sound insulation unit has a second sound insulation plate,
The second sound insulation plate is
A pattern frame having a central pattern area and a plurality of peripheral pattern areas separated from the central pattern area by a separation bar and arranged around the central pattern area,
It is installed to block the path of air, converts sound waves of air into elastic waves, and includes an elastic membrane mounted on the pattern frame,
A ceiling structure for blocking inter-floor noise, wherein at a resonant frequency that is the same as the frequency of the noise to be blocked, the displacement of the elastic film in the central pattern area and the displacement of the elastic film in the peripheral pattern area are opposite to each other. According to clause 9,
A ceiling structure for blocking noise between floors, wherein the sum of the area of the central pattern area and the area of the plurality of peripheral pattern areas is equal. According to clause 9,
A ceiling structure for blocking inter-floor noise, wherein the second sound insulation plate has a resonance frequency equal to the frequency of the noise in the upper space. According to clause 9,
The second sound insulation plate is,
A ceiling structure for blocking inter-floor noise, wherein the lower space is arranged to have a volume that has a target frequency equal to the resonance frequency of the ceiling finishing material. According to clause 9,
A plurality of second sound insulating plates are provided in a grid shape on the ceiling frame, and among the plurality of second sound insulating plates, adjacent second sound insulating plates with respect to sides are arranged to have different resonance frequencies. Ceiling structure to block noise between floors. According to clause 9,
A plurality of second sound insulating plates are provided in a grid shape on the ceiling frame, wherein a second sound insulating plate having a relatively low resonance frequency among the plurality of second sound insulating plates is disposed in a central area, and a plurality of second sound insulating plates are disposed in an edge area. A ceiling structure for blocking inter-floor noise, characterized in that a second sound insulating plate having a relatively high resonance frequency is disposed among the second sound insulating plates.

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