JP2016020941A - Residence-wall sound absorption/insulation structure and attachment structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a thin and lightweight structure that can reduce sounds of the low frequency to high frequency, especially can provide a high sound insulation property even in the region about 200 Hz, and is effective for cutting off the vibration of a surface material caused by a sound wave energy.SOLUTION: On both surfaces of a reflective intermediate layer 6, sound absorption layers in which a hard foam material 4 having communication air bubbles is filled into a honeycomb material 5 are disposed so as to form a symmetric structure with respect to the intermediate layer. Porous materials 3 are bonded to both surfaces of each sound absorption layer, thereby forming a panel structure. A reflective surface layer is disposed on each of both surfaces of the panel structure via an air space of a certain thickness.SELECTED DRAWING: Figure 1a

Description

  The present invention relates to a noise countermeasure structure for a partition and an outer wall in a house.

  In the conventional partition structure and outer wall structure, bracing or reinforcing grid bars are provided between the main pillars, and after a sound-absorbing material such as glass wool is inserted in the gap, the room side is covered with a plasterboard board or the like. The finishing method is standard with cloth on the surface. The outer wall is made of tile-based boards, siding materials, or mortar finish.

  However, from the viewpoint of noise countermeasures from outside (aircraft, vehicles, construction, etc.) and noise from neighboring houses or rooms, the conventional structure is inadequate, so complaints cannot be generated and a structure that increases transmission loss (sound insulation). The current situation is what is required. In particular, the materials and structures of the conventional method have a problem in reducing noise in a low frequency range.

  As a means for reducing noise, a method of solving with a thickness including an air layer and a measure based on a mass law using a material having a high surface density such as lead are generally not suitable for a housing structure. Noise countermeasures for homes are noise countermeasures that are incident on both sides of the wall structure.

  Therefore, when pursuing the ideal form of the damping structure in the structural wall, a structure in which a sound insulation layer (reducing transmitted sound by reflection and sound absorption) is provided in the middle, and both surfaces are symmetrical. However, there is no example of an effective structure in which a sound insulation structure layer is provided in the middle and sound absorption and insulation layers are provided symmetrically on both sides to pursue sound insulation performance.

  A structure is disclosed in which a sound absorbing layer made of air or a porous material and a sound insulation structure are provided between surface plates made of plywood or the like (Patent Document 1). In this structure provided with an intermediate plate, both surfaces of the intermediate plate are symmetrical with respect to the incidence of noise.

  When the attenuation layer is read from the example diagram of Patent Document 1, reflection (surface plate such as plywood)-sound absorption (sound absorbing material layer)-sound insulation (high density mass sheet affixed to elastic plate)-reflection (intermediate plate, 1.0 mm) Below)-Sound insulation (high density mass sheet affixed to elastic plate)-Sound absorption (sound absorbing material layer)-Reflection (surface plate such as plywood), which is a structure that emphasizes sound insulation by reflection. However, the numerical explanation of the effect is not disclosed.

  In addition, the sound source is reflected and sound-absorbed using an aluminum fiber-based plate as the surface material, the transmitted sound is attenuated by the sound-absorbing layer filled with foam material in the honeycomb material, and the sound transmitted through this layer is plastered with the aluminum plate. The structure reflected by the laminated board of this is disclosed (patent document 2). In this structure, there is no intermediate plate and no symmetrical structure.

  The honeycomb core material is a structure in which a breathable sheet is laminated on the front and back surfaces of the honeycomb core material, and is provided so as to cover the back surface side of the back surface sheet, and includes a back cover that forms an air layer between the back surface sheet. A structure is disclosed (Patent Document 3). The course of attenuation is described in paragraph 0018 of Patent Document 3, but there is no intermediate plate and it is not based on a symmetrical structure.

  Furthermore, a structure in which a sound absorbing member is filled between the inner and outer surfaces is disclosed by standard prior art (Patent Document 4). In this structure, the double-sided plate has a symmetrical structure with the sound-absorbing material interposed therebetween, but no reflector structure is provided in the middle.

JP 2008-174964 A Japanese Patent No. 4972711 JP 2002-227323 A JP 10-61342 A

  In common with the above-described prior art, first, sound insulation largely depends on the mass law (thickness, weight), and it is difficult to reduce the weight. Second, improvement in sound absorption rate and reduction in transmitted sound are proportional. No, there is no light and thin sound insulation structure. Third, reduction from low frequency to high frequency is difficult with thin and light structure, especially in the region around 200 Hz, high sound insulation is achieved with a light and thin structure. Fourth, there is a problem that no effective countermeasure has been proposed for blocking the vibration of the surface material generated by the sonic energy.

  In view of the above problems, the present invention provides a laminated structure with a sound absorbing layer filled with open cell hard foam material in a honeycomb material so as to have a symmetrical structure with the intermediate layer sandwiched between both surfaces of the reflective intermediate layer. A panel structure in which a porous surface material is bonded to both surfaces of the sound absorbing layer is provided, and a reflective surface layer is provided on both surfaces of the panel structure via an air layer having a certain thickness.

A transmission loss (sound insulation value) of 30 dB or more is obtained from a region of 200 Hz or more. In addition, a structure in which an air layer is provided is effective in reducing noise, and is 3.8-17. The effect of realizing 9 dB reduction was obtained.

A structure in which a reflective (sound insulating) material layer is provided in the middle of the sound absorbing core layer, a sound absorbing layer filled with open cell hard foam material is bonded to a honeycomb material on both surfaces, and a porous material is bonded to both surfaces Structure B in which an air layer (non-adhesive layer) is provided on structure A via an elastic material, and a base surface material (reflection / sound insulation material) is installed A figure in which a porous material is bonded to one side of a sound-absorbing core layer filled with open cell rigid foam material in a honeycomb material, and a non-breathing material (reflection / sound insulation material) is bonded to the other side A non-breathing material layer (reflective / sound insulating material) is provided in the middle of the sound absorbing core layer, and a sound absorbing layer filled with open cell hard foam material is bonded to both sides of the sound absorbing core layer. Figure with non-ventilated material (reflective / sound insulation) bonded to the surface Front view with structure A placed between studs (without base surface material) Cross-sectional view in which a base surface material is provided outside the structure A through an air layer, and a finishing cloth is pasted on the base surface material A diagram in which an air layer (non-adhesive layer) is provided between the stud and the base surface material with an elastic material, and a structure A is provided.

  In order to reduce the noise, a laminated structure of the first layer to the ninth layer is used as an appropriate combination of the path of reflection, vibration suppression, and sound absorption depending on the constituent material and structure.

  The first layer is provided with a reflection plate on the incident surface of the sound wave, reflects the incident sound wave, and attenuates the sound wave by the vibration of the plate caused by the sound wave. The reflector is provided with an air layer on the back surface on the incident side in order to be able to vibrate.

  An air layer (absorption and propagation prevention layer) is provided in the second layer, and the sound transmitted through the reflector is dispersed and attenuated by sound absorption / vibration in the air layer. This air layer is a layer that does not directly bond the first-layer reflector and the third-layer porous material. In the case of attaching a structure manufactured from the third layer to the seventh layer to the stud, the thickness of the air layer is equal to the thickness of the elastic material by sandwiching the elastic material between the first layer and the ninth layer. Secure.

  A porous surface material layer (fiber system, foam system) is provided in the third layer, a part of incident sound wave energy from the air layer part is reflected, and the invading sound wave causes thermal energy conversion in the porous sound absorbing layer, Attenuate.

The fourth layer is provided with a honeycomb material layer for maintaining strength and absorbing sound, and a sound wave is incident into the open cell foam material filled in the honeycomb material cell to cause thermal energy conversion and attenuate the fourth layer. An intermediate plate (layer) that reflects the transmitted sound wave is provided, the sound wave is reflected by the intermediate plate, and the sound wave is returned to the sound absorbing layer of the fourth layer. This repeated action causes thermal energy conversion and attenuates the sound wave.

  The sixth layer is provided with the same layer as the fourth layer that absorbs sound waves transmitted through the intermediate plate (layer), and causes thermal energy conversion of the transmitted sound waves to be attenuated.

  The seventh layer is provided with the same porous surface material layer (fiber type, foam type) as the third layer, and the sound wave transmitted through the fourth layer undergoes thermal energy conversion to be attenuated.

  The eighth layer is provided with the same air layer (propagation preventing layer) as the second layer, and heat energy conversion is caused in the transmitted sound wave to absorb the vibration of the ninth layer reflector.

  A reflection plate is provided on the ninth layer, and the residual transmitted noise up to the eighth layer is returned from the eighth layer to the fifth layer to attenuate the transmitted sound to the outside.

  The above-mentioned layer path is a means for taking in the partition and outer wall structure of the house. That is, the first and ninth layer portions of the layers are both surface materials that serve as the base of the partition, and the outer wall indicates the interior surface material of the outer wall structure (the base surface material before makeup) and the outer wall material portion. In the standard of the housing structure (Patent Document 4), the first layer and the ninth layer are reflecting materials (Patent Document 4 is a face plate), and a sound absorbing material is packed therebetween.

  In this structure, the vibrations of the first and ninth layers of the reflective material that are manifested by noise cannot be reduced, and sound wave energy is directly propagated to the studs that support the sound absorbing material and the face material. In the present application, an air layer (layer 2) is provided in the structure portion to reduce propagation, thereby reducing noise.

  The residential wall sound-absorbing and sound-insulating structure of the present application is divided into a panel, a structure A portion, and on-site layers 1 and 9 that are placed between the surface materials. The third to seventh layer portions are the panel structure A, and the first, second, eighth and ninth layers are the construction range at the time of site installation. The necessity to divide into the structure A portion and the site-installed portion is to reduce the propagation of sound waves. The panel structure A is finished to a size (referred to as a seal width) that is 5 to 10 mm smaller than the space between the pillars in order to block the sound wave propagating from the pillars, and a space is provided around the structure A.

  Utilization of this space plays a role of propagation reduction, and this part is filled with a silicone sealing material which is an elastic material, and the sound wave energy is reduced by the elastic function of the material. Further, the space (air layer) between the base surface material surface and the panel structure A surface is provided by an elastic material sandwiched between the studs and the base surface material. The panel structure A held by the elastic material between the periphery of the panel and the inter-columns realizes a structure in a vibrating plate (damper) state that absorbs sound wave vibration.

  In order to prevent vibration propagation, the entire periphery of the panel structure A and the spacer are bonded to each other with a silicone sealant having rubber elasticity to attach the spacer to the panel structure A. By integrating with the studs with the sealing material, the panel structure A part becomes a part that replaces the conventional bracing and pier. Further, the panel structure A and the first and ninth base layer surface materials are not fixed directly, but are fixed only by the spacers and the base surface portion. As for the fixing method, an elastic material is sandwiched between the stud and the base surface portion, and it is fixed with a nail and a screw. The air layer can be formed on the base surface material surface and the panel structure A surface by the thickness of the elastic material, and becomes a propagation reduction layer.

  In the case of a conventional house, the reflector serving as the first layer corresponds to an interior partition, and finishes a cloth or a painted wall on a plywood / gypsum base. In the present application, a 5 mm slag gypsum plate is used as the base surface material, but the thickness and material are not limited.

  In the case of a conventional house in the second layer, glass wool is often used as a sound absorbing / insulating material instead of the panel structure A between the studs and the surface material, and the structure is completed in this state. In the present application, an air layer is provided between the first layer and the third layer. The thickness of the air layer may be a gap that exceeds the surface roughness of the third layer surface, or may be appropriately thickened. In the present application, an air layer is provided by sandwiching an elastic material of 2 mm between the stud and the surface material. The air layer absorbs (prevents propagation) the first layer reflector vibrations generated by sound waves.

  In addition, the incident sound is in the air layer part, and a reflection collision occurs between the third layer aluminum fiber material reflector (63% of the reflector material), and the air layer part and the third layer fiber porous part (porosity 37). %) Causes thermal energy conversion to attenuate sound waves.

  The third layer is a porous surface material and can be selected from organic / inorganic fibers, metal fibers, and foam materials. The sound wave transmitted through the second layer is converted into thermal energy in the space of the porous material and attenuated. In the present application, an aluminum fiber material (trade name: pore, porosity 37%, thickness 1.6 mm) is used, but open cell foam material or organic / inorganic non-woven fabric may be used.

  The fourth layer uses a honeycomb material layer in order to maintain the strength of the panel structure and increase the sound absorption efficiency, and the cells of the honeycomb material are filled with the open cell rigid foam material. The aluminum fiber material of the third layer material part is bonded at the tip of the honeycomb material. The sound waves transmitted through the three layers are incident on the foam material, which is a communicating bubble, and repeatedly reflects and collides with the inner wall of the cell. Also, reflection and collision occur in the filled foam bubbles, and the air resistance with the viscosity in the bubbles Attenuates while causing thermal energy conversion.

  As the foam material, a highly acidic material having a pH of 7 or less (actually measured values 2 to 4) is selected as a countermeasure against germs and insects. The material of the honeycomb material can be selected from materials based on paper, resin, and metal, but in this application, a ceramic-based honeycomb material (Grandex: HR-15) was selected from the aspects of heat insulation, strength, incombustibility, and odor. .

The cell shape is not limited to a circle, triangle, square, hexagon or the like. The foam material was limited to a porous hard foam material having open cells, and in the present application, a hard phenol foam material (Matsumura Crafts: Aqua Foam, density 19 kg / m ³ ) that absorbs water, has open cells, and does not ignite was selected.

The fifth layer is composed of an intermediate plate (layer) that reflects the sound wave transmitted through the fourth layer. The intermediate plate can be selected from organic / inorganic / metal non-breathable plates. This is an intermediate plate that reflects and attenuates the reflected sound waves to the fourth sound absorbing layer. As the plate, a 5 mm slag gypsum board was selected, but the thickness and material are not limited. If the selection is based on the law of mass, the effect of sound insulation is increased.
The intermediate plate has a structure in which it is bonded to the tip of the honeycomb material of the fourth layer.

  The sixth layer has the same structure as the fourth layer, and is a structure that attenuates sound waves that have passed through the intermediate plate (layer). The intermediate plate has a structure bonded to the tip of the sixth layer honeycomb material.

  The seventh layer is made of the same porous material as that of the third layer and attenuates the sound wave transmitted through the sixth layer. It is an aluminum fiber material structure bonded to a sixth layer honeycomb material.

  The air layer of the eighth layer is a layer that performs the same function as the second layer.

  The ninth layer corresponds to the outer wall of a conventional house and is finished with a tile board, a mortar finish, wood, or the like. In the case of the partition, the material composition is the first layer. In the present application, a 5 mm thick slag gypsum board was selected. As the outer wall object, a ceramic-based 12 mm UB light board (Ube board) was selected. The material used for this part is not limited in thickness and material. If the selection is based on the law of mass, the effect of sound insulation is increased.

  The structure described above is characterized by a structure in which both surfaces are symmetrical with an intermediate plate (layer) interposed therebetween. The effect of attenuating the incident energy can be achieved by making the fourth layer of the structure shown in FIG. 1 in which the honeycomb cell is filled with open-cell hard phenol foam material symmetrical with respect to the intermediate plate. In terms of manufacturing process, simple work is required, and the process is simplified.

  The structure that contributes to sound absorption and insulation is a panel structure of the third to seventh layer portions, and this part is attached so as to be sandwiched between the first and ninth layers attached in the field. The second layer and the eighth layer are air layers in a gap portion formed at the time of attachment. The structure is fixed by adhesion to the four columns around the structure.

  The bonding method may be a filling sealing method using a silicone sealing material generally used in construction. The place to be bonded is made with the materials of the third layer, the fifth layer, and the seventh layer. If strength is required, 3rd and 7th layer aluminum fiber (trade name: pore, porosity 40%, thickness 1.6mm) material is appropriate, and if the 5th layer is a thick intermediate plate, Bonding area increases and strength increases.

  The above structure aims at achieving a transmission loss (sound insulation value) of 30 dB or more from a region of 200 Hz or more.

The structure A in FIG. 1a is provided with an intermediate material 5 mm of slag gypsum plate code 6 serving as a reflector for the incidence of sound waves from both sides, and a sound absorbing surface material layer 3 (product) on both sides of the intermediate material. Name: Pore, aluminum fiber material, porosity 37%, thickness 1.6 mm, Unix Corporation) and open-cell hard phenol foam material with sound absorbing material code 4 that further attenuates sound waves transmitted through the sound absorbing surface material layer (product name: (Aqua, density 19 kg / m ³ , thickness 40 mm).

  In order to effectively attenuate the sound wave energy, the open cell rigid phenol foam material is bonded to the aluminum fiber material of code 3 with the adhesive of code 8 (trade name: RA-233, emulsion system, Aika Industry Co., Ltd.). Used in a state filled with a honeycomb material (trade name: HR-15, ceramic type, thickness 41 mm, Grandex). Adhesion to the aluminum fiber material of No. 3 and the honeycomb material is performed by adhering the adhesive only to the honeycomb portion under a condition that does not block the porosity of the aluminum fiber material.

  The sound absorbing layer portion consisting of the intermediate material of reference numeral 6 and the reference numerals 3, 4 and 5 is made of 5 mm of the intermediate material and the honeycomb material of reference numeral 5 and the adhesive of reference numeral 9 (epoxy and emulsion systems can be used). Adhere to the slag gypsum board applied on the entire surface.

The structure B shown in FIG. 1B has a structure in which an air layer 2 mm indicated by reference numeral 2 is provided on both sides between the base surface material indicated by reference numeral 1 and the structure A as a measure for preventing the propagation of sound waves, and a thickness of 89.6 mm is provided therebetween. It is sectional drawing in which A was inserted. The space of 2 mm is an elastic material sandwiched between the base surface materials, a foam mainly composed of a polyolefin resin of reference number 15 (closed-cell polyethylene foam material: hardness 24, density 35 kg / m ³ , adhesive on one side, three Wakako Sanperca L-2501NNN, EVA foam: hardness 35, density 115 kg / m ³ , Mifuku Industrial Mitsufuku V-10).

  In the structure B, the first layer is a member of reference numeral 1 that is attached in the field as a base surface material between the studs, and a slag gypsum board, a gypsum board, a plywood, or the like can be used. In the examples, a slag gypsum plate having a thickness of 5 mm was used as a base surface material in order to serve as a reflection / vibration plate for incident sound waves. However, the thickness is not limited to 5 mm.

  The second layer is an air layer code 2 provided between the base surface material of reference numeral 1 and the structure A, and vibration absorption of the base surface material of reference numeral 1 is performed in the air layer portion and also plays a role of sound absorption.

  The third layer is an air-permeable porous material 3 aluminum fiber material that is the surface material of the structure A, and the fiber material plate with a porosity of 37% serves to absorb and reflect the transmitted sound wave, and at the same time is 100 μm or less. A fiberboard made of ultrafine fibers has a damping effect and functions to damp.

  The fourth layer is a sound-absorbing layer made of a phenol foam material having a connected cell of 40 mm in thickness and filled with a honeycomb material of 41 mm in thickness of 5, and in the bubbles of the open cell structure foam filled in the honeycomb material. High sound absorption is achieved due to the thermal energy conversion effect.

  The fifth layer was an intermediate reflecting plate, and a slag gypsum plate having a thickness of 5 mm and a reference numeral 6 was used. The sixth layer has the same function as the fourth layer and attenuates the sound wave transmitted through the fifth layer. The seventh layer plays the same role as the third layer and attenuates the sound wave transmitted through the sixth layer. The eighth layer plays the same role as the second layer, and serves to attenuate sound waves that have passed through the seventh layer and to absorb vibration of the reference numeral 6 of the ninth layer.

  2 is a panel cross-sectional view of 99.6 mm, which is a comparative example of structure B in FIG. 1b. The first layer is an air-permeable porous aluminum fiber material 3 and has the functions of sound absorption, vibration control and reflection. The second layer is a sound-absorbing layer of phenol foam material having open-cell bubbles with a thickness of 85 mm and filled with a honeycomb material with a thickness of 86 mm having a thickness of 5, and has a high sound-absorbing property due to a synergistic effect with the honeycomb structure. The third layer is a non-ventilated reflector 7 and is a ceramic board (UB board light, Ube Board) having a thickness of 12 mm.

  The structure shown in FIG. 3 is a 99.6 mm panel cross-sectional view in which a reflector (sound insulating plate) having a thickness of 5 mm is provided in the middle of the structure shown in FIG. 2, and is a comparative example of the structure shown in FIGS. The first layer is a breathable porous aluminum fiber material 3 and has the functions of sound absorption, vibration suppression and reflection. The second layer is a sound-absorbing layer of phenol foam material having open-cell bubbles having a thickness of 40 mm and filled with a honeycomb material having a thickness of 41 mm having a thickness of 5 and has a high sound-absorbing property due to a synergistic effect with the honeycomb structure. The third layer is an intermediate reflector, and a 5 mm slag gypsum plate is denoted by 6.

  The fourth layer has the same structure as the second layer, and is a sound absorption layer of phenol foam material having open-cell bubbles 4 filled in the honeycomb material, and attenuates sound waves transmitted through the third layer.

  The fifth layer is a non-vented plate of reference numeral 7 that reflects and insulates the sound wave transmitted through the fourth layer, and is a ceramic board having a thickness of 12 mm (Ube board: UB board light).

  FIG. 4 is a front view of the structure A attached to a house. A structure of reference A is inserted between the pillars of reference numeral 11, and a silicone elastic material of reference numeral 12 is filled and bonded to a portion of a gap of about 3 to 10 mm provided between the structure A and the intermediate pillar. It is the figure which integrated the pillar of the code | symbol 11. FIG.

  FIG. 5 a is a cross-sectional view in which the base surface material 1 is placed on the front and back of the structure A. There is an air layer of 2 between the structure A and the base surface material of 1. Reference numeral 13 denotes a decorative cloth to be applied to the surface of the base surface material (plywood / gypsum system, etc.).

  FIG. 5b shows a cross-sectional structure that keeps the thickness of the air layer constant. The thickness of the air layer is determined by an elastic material having a reference numeral 15 sandwiched between the intermediate pillar 11 and the base surface material 1 and plays a role of preventing the vibration of the base surface material from propagating to the intermediate pillar 11.

  The thickness of the elastic material is to prevent propagation, and it is not necessary to increase the thickness, and it may be about 2 to 5 mm. The material is suitably in the range of hardness of 20 to 40 showing appropriate elasticity, and in the examples, a foam mainly composed of polyolefin resin (Sanka Corporation Sanperka-2501NNN, Mifuku Kogyo, Mitsufuku V-10) was selected.

The hardness ranges from 20 to 40 and the density ranges from ³⁰ to 130 kg / m ³ . The width of the elastic material does not need to match the entire width of the inter-column and is intended to reduce propagation. Therefore, the width is preferably narrower than the column width, and 50% or less of the column width is appropriate. The material may be an elastic material such as rubber.

  In the example, a 5 mm slag gypsum plate with a reference numeral 1 was selected as the base surface material sandwiching the air layer. The base surface material may be a gypsum board or plywood, and the interior surface can be finished with a cloth pasting code 13 or a painted wall finish.

  In the case of the outer wall, preferences such as tile panels, siding materials and mortar finishes can be selected. The studs, surface material and attachment can be done by general methods such as nails and screws. The elastic material 15 used for connection between the column portions 1 and 11 in FIG. 5B may be a silicone-based elastic material.

  Further, the connection between the structure A and the inter-column 11 is fixed with a silicone elastic material 12 (bonded silicone coke, Konishi Co.). As a result, the structure A can serve as a damper for the studs and also serves as a bracing of the conventional structure due to the strength and elastic force of the silicone-based elastic material.

  Table 1 shows a comparison of transmission loss by the structures of FIGS. According to Table 1, FIG. 2, which does not have an intermediate plate structure, has a difference of 11.9 to 15.8 in measured values from the structure B of FIG. Further, the structure shown in FIG. 3 having an intermediate plate but fixed with a reflector on one side has a difference of 3.8 to 11.8 dB in measured values, which is worse than the structure shown in FIG. 1B. Further, the comparison between Patent Document 2 without an intermediate plate and the structure B in FIG. 1b has a difference of 7.7 to 17.9 dB, which is worse than those in FIGS.

  As a result, there is a reflecting plate (base surface material) of reference numeral 1 at a position via an air layer of reference numeral 2 on both sides, the structure A and the reflecting plate are not fixed on the surface, and the reflecting plate and the structure body. It was confirmed that the structure B of FIG. 1b of the present application having excellent attenuation loss (sound insulation power) having attenuation paths 1 to 9 arranged in a state where A can be vibrated by the force of sound waves.

  A comparison with the references was made in Table 2. Patent Documents 2, 3 and 4 differ from the structure B of the present application in that they do not have an intermediate plate structure. The structures of Patent Documents 2, 3 and 4 are not symmetrical structures which are the features of the present application. Therefore, it is important to compare Patent Document 1 having an intermediate plate structure with FIG. 1 of the present application, but since Patent Document 1 does not explain actual measurement values, numerical comparison cannot be performed.

However, from Table 1, the present application shows a transmission loss (sound insulation) characteristic superior to Patent Document 1 because the air layer for preventing propagation provided in the structure B shown in FIG. In addition, it has been proved that it is effective, and since the air layer is not in Patent Document 1, it can be inferred that the present application shows a transmission loss (sound insulation) characteristic superior to that of Patent Document 1.

It is a comparison between the elastic plate of layer b of Patent Document 1 described in Table 2 and the elastic material code 15 (layer a of Table 2) in FIG. 5 of this application. The structure used for the entire surface shown in Patent Document 1 is not appropriate.

A structure suitable for this purpose is a structure capable of blocking propagation. The best means is blocking by a structure provided with an air layer. In order to select this air layer, the structure of the present application provided an air layer effective for propagation countermeasures by sandwiching an elastic material code 15 narrower than the width of the inter-column between the inter-columns.

1 Base surface material (reflection / sound insulation): Installed on-site 2 Air layer 3 Breathable porous material 4 Open cell rigid foam material 5 Honeycomb material 6 Intermediate reflector (sound insulation)
7 Non-venting plate 8 Adhesive applied to honeycomb material and bonded to porous material 9 Adhesive applied to entire surface of intermediate plate 10 Adhesive applied to entire surface of non-venting plate 11 Pillar 12 Elastic seal material: Construction on site Silicone-based elastic material 13 Finishing cloth material for base material: On-site installation 14 Sonic incident 15 Elastic material (Table 2 is layer a)
A Panel structure (part other than 1.2 in the material structure of FIG. 1)
B Overall structure of sound-absorbing and insulating structure including A structure (excluding cross-applied part on the decorative surface)

When the damping layer is read from the example diagram of Patent Document 1, a surface plate (polyester resin-coated galvanium steel plate)-a sound absorbing material (foaming material or porous material)-an elastic plate (rubber plate or foamed rubber) arranged at intervals. Plate)-intermediate plate (zinc iron plate)-spaced apart elastic plate (rubber plate or foam rubber plate)-sound absorbing material (foam material or porous material)-surface plate (polyester resin coated galvanium steel plate) It is a structure that emphasizes sound insulation by reflection. However, the numerical explanation of the effect is not disclosed.

Claims (5)

A panel in which a sound absorbing layer filled with open cell hard foam material is provided on a honeycomb material so as to have a symmetrical structure on both sides of the reflective intermediate layer, and a porous surface material is bonded to both surfaces of the sound absorbing layer A laminated structure comprising a structure and a reflective surface layer provided on both sides of the panel structure via an air layer having a constant thickness. A sound absorbing and insulating structure for a residential wall in which the laminated structure according to claim 1 is fixed to an intermediate column via an elastic material. The sound absorbing and insulating structure according to claim 2, wherein the elastic material for attaching the sound absorbing and insulating structure and the stud is a silicone-based elastic material, and the seal width is in the range of 5 to 10 mm. The thickness of the air layer between the surface material and the studs of claim 2 is 2 to 5 mm, and the elastic material for securing the air layer is a polyolefin resin having a hardness of 20 to 40 and a density of 30 to 130 kg / m ^3. A sound-absorbing and insulating structure characterized in that the width of the material is narrower than that of the studs. A sound absorbing and insulating structure using a hard phenol foam material having open cells of PH7 or less in the panel structure of claim 1.