US2326763A - Acoustic material - Google Patents
Acoustic material Download PDFInfo
- Publication number
- US2326763A US2326763A US281663A US28166339A US2326763A US 2326763 A US2326763 A US 2326763A US 281663 A US281663 A US 281663A US 28166339 A US28166339 A US 28166339A US 2326763 A US2326763 A US 2326763A
- Authority
- US
- United States
- Prior art keywords
- sound
- coating
- wall
- sound absorbing
- acoustic material
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 239000012814 acoustic material Substances 0.000 title description 3
- 238000000576 coating method Methods 0.000 description 16
- 239000011248 coating agent Substances 0.000 description 15
- 239000000463 material Substances 0.000 description 10
- 239000003973 paint Substances 0.000 description 6
- 239000006185 dispersion Substances 0.000 description 5
- 239000011358 absorbing material Substances 0.000 description 4
- 238000010276 construction Methods 0.000 description 4
- 241000276489 Merlangius merlangus Species 0.000 description 3
- 230000001680 brushing effect Effects 0.000 description 3
- 239000002657 fibrous material Substances 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 238000005507 spraying Methods 0.000 description 3
- 244000068988 Glycine max Species 0.000 description 2
- 235000010469 Glycine max Nutrition 0.000 description 2
- 229920001131 Pulp (paper) Polymers 0.000 description 2
- 229920002472 Starch Polymers 0.000 description 2
- 230000002745 absorbent Effects 0.000 description 2
- 239000002250 absorbent Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 238000005034 decoration Methods 0.000 description 2
- 239000011094 fiberboard Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000010422 painting Methods 0.000 description 2
- 235000018102 proteins Nutrition 0.000 description 2
- 102000004169 proteins and genes Human genes 0.000 description 2
- 108090000623 proteins and genes Proteins 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 235000019698 starch Nutrition 0.000 description 2
- 239000008107 starch Substances 0.000 description 2
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 1
- 229920003043 Cellulose fiber Polymers 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000009435 building construction Methods 0.000 description 1
- 239000005018 casein Substances 0.000 description 1
- BECPQYXYKAMYBN-UHFFFAOYSA-N casein, tech. Chemical compound NCCCCC(C(O)=O)N=C(O)C(CC(O)=O)N=C(O)C(CCC(O)=N)N=C(O)C(CC(C)C)N=C(O)C(CCC(O)=O)N=C(O)C(CC(O)=O)N=C(O)C(CCC(O)=O)N=C(O)C(C(C)O)N=C(O)C(CCC(O)=N)N=C(O)C(CCC(O)=N)N=C(O)C(CCC(O)=N)N=C(O)C(CCC(O)=O)N=C(O)C(CCC(O)=O)N=C(O)C(COP(O)(O)=O)N=C(O)C(CCC(O)=N)N=C(O)C(N)CC1=CC=CC=C1 BECPQYXYKAMYBN-UHFFFAOYSA-N 0.000 description 1
- 235000021240 caseins Nutrition 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000006735 deficit Effects 0.000 description 1
- 235000013312 flour Nutrition 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
- E04B1/82—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to sound only
- E04B1/84—Sound-absorbing elements
- E04B1/86—Sound-absorbing elements slab-shaped
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
- E04B1/82—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to sound only
- E04B1/84—Sound-absorbing elements
- E04B2001/8457—Solid slabs or blocks
- E04B2001/8461—Solid slabs or blocks layered
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
- E04B1/82—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to sound only
- E04B1/84—Sound-absorbing elements
- E04B2001/8457—Solid slabs or blocks
- E04B2001/8476—Solid slabs or blocks with acoustical cavities, with or without acoustical filling
- E04B2001/848—Solid slabs or blocks with acoustical cavities, with or without acoustical filling the cavities opening onto the face of the element
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
- Y10T428/24273—Structurally defined web or sheet [e.g., overall dimension, etc.] including aperture
- Y10T428/24322—Composite web or sheet
- Y10T428/24331—Composite web or sheet including nonapertured component
Definitions
- the present invention produces and provides an acoustic material, generally in the form of a slab-like wall element, the exposed surface of which may be painted, either by brushing or spraying, not only immediately after completion of the wall construction, but subsequently, as often as desired, without in any way destroying or reducing the original acoustical qualities of the wall.
- a coating prepared by mixing an adhesive, usually ⁇ an organic glutinous or starchy material with whiting or other pulverant chalky substance with sufcient liquid to form a slurry.
- an adhesive usually ⁇ an organic glutinous or starchy material with whiting or other pulverant chalky substance with sufcient liquid to form a slurry.
- the coating is permitted to harden and dry thoroughly whereuponthe coating is perforated by the formation of relatively shallow holes in the coated surface of the element, usually by simultaneously piercing the'coating at a number of points.
- Such piercing of the coating is found to permit sound waves to have access to the exposed sound deadening or absorbing material to a sufficient extent to absorb approximately the same per cent of sound as the same sound absorbing material absorbs when not provided with the finish taught by my present invention.
- Fig. 1 is a front or face view of an element adapted to be used as an exposed wall element and constructed in accordance with. the principles of my invention, tne several areas of the element being shown to indicate diagrammatically the several steps or operations which comprise my new method of producing an acoustic wall element;
- Fig. 2 is a similar vie'w showing the finished element fragmentarily and on an enlarged scale with respect to Fig. 1;
- Fig. 3 is a fragmentary cross sectional view, on a still further enlarged scale, showing the relatively impervious ,coating and the perforations therethrough.
- Fig. 1 of the drawing the four zones displayed indicate, reading fromtop to bottom, four conditions of the building element occurring serially during the production of the element.
- the top zone represents the initial untreated block or slab of fibrous material having a high degree of sound and liquid absorption.
- the next zone represents the block after it has been coated with the relatively impervious coating referred to heretofore.
- the third zone shows the block after perforations have been formed through the 'coating and in fact shows the completed building element, ready to be incorporated in a building Wall and subsequently decorated in any conventional manner Without having its eiciency as a sound absorbing elementl affected in any way.
- the fourth zone shows the block as it appears after it has been incorporated in a wall construction and decorated as indicated.
- the body of sound absorbing material is designated at l0 in the drawing and in its preferred form comprises what is known in the building art as low density fiber board.
- This board is conventionally formed by subjecting wet wood pulp or other cellulose fiber pulp to pressure, usually at elevated temperatures.
- the slabs so .formed are of low density but are sufficiently compact to be self-sustaining and sufiiciently strong and rigid as to be conveniently handled without liability of breakage or disintegration.
- Another property of low density ber board is its very high sound absorption. 'I'his quality makes its use as an acoustic material highly advantageous but in the past a marked objection to its use has resided in the fact that it is next to impossible to coat the material because of its very strong tendency to absorb liquids. Again, even if suiiicient paint or the like were applied to form a coating, or if a sufficiently thick material were applied with like result, the board would then lose its sound absorbing quality.
- a slurry or dispersion which in the preferred form comprises an. adhesive orA bindingmaterial which may be starch, casein, soybean flour,v glue, or other material having the indicated properties together with an inorganic ller such as Whiting, precipitated chalk, marl, light-weight; gypsum, .or the like.
- I may employ an aqueous dispersion which in the dry state comprises soya bean protein' and 90% ller or a dispersion of 50% starch and 50% whiting.
- a coating of the dispersion so formed may readily be sprayed or brushed upon a surface of the sound absorbing body and is found to form a layer which is sufficiently impermeable to the vehicles used in conventional paints, of both -the oil and water variety, as to' satisfactorily meet the requirements of the present invention.
- the coating is designated l I.
- perforations therethrough.
- Such perforations are desired to be wholly through the coating but l extend as little as is practically possible into the body of the sound absorbing material itself.
- a prime requisite is that the opening so formed be of sufcient diameter or distance across as not to be closed or bridged over by a subsequent painting operation when such paint is applied either by spraying or brushing. It is found that openings approximately alf in diameter give results quite satisfactory from this standpoint.
- the openings designated at i2 in the drawing are uniformly distributed over the coated surface of the board and in such example I have shown the openings so spaced that they occur approximately seven to the square inch.
- the lower zone of Fig. 1 represents the block or board I0 after it has been incorporated in a wall structure andprovided with one or more surface coatings of paint as at I3.
- An acoustic construction comprising a body of low density, compacted, cellulosic fibrous material having a surface thereof coated with a material relatively impervious topaint vehicles and comprising a dispersion of protein and an inorganic ller, said coating being friable by nature and provided with a plurality of perforations whereby the underlying brousmaterial *is par- -without closing or filling said openings and being of a total depth only slightly greater than the thickness of said coating.
Description
Aug. 17, l943.` D. D. QRANDELL l 2,325,763
ACOUSTIC MATERIAL Filed June 28, 1939 SOUND ABSORB/NG BCOY /L /MPER V/OUS COA TNG u o o o o o o o a u u o u o o o o n u o a D n n n o o o u o a o e e v o o o a a u u u u o DEcoRAT/VE n o a u n u n o COA TNG o o n o n n n o n o u a n o o c n o o o Q c o o o INV'ENTOR ATTORNEYS Patented Aug. 17, 1943 ACOUSTIC MATERIAL Dean D. Crandell, Buffalo, N. Y., assignor to National Gypsum Company, Buialo, N. Y.
Application June 2-8, 1939, Serial No. 281,663
1 Claim. (Cl. 15de-44) This invention relates to an acoustical material.
Various materials and compositions of materials have heretofore been proposed for the production of sound proof or sound absorbent walls for building construction and the like. While various objections have arisen to hitherto known constructions, a prime difiiculty has been the problem of decoration since it has either been impossible to paint or otherwise decorate or redecorate the surface of the material after erection of the building, or such painting or decoration could be accomplished only to the impairment or utter destruction of the sound absorbing or sound proofing qualities ofthe structure.
The present invention produces and provides an acoustic material, generally in the form of a slab-like wall element, the exposed surface of which may be painted, either by brushing or spraying, not only immediately after completion of the wall construction, but subsequently, as often as desired, without in any way destroying or reducing the original acoustical qualities of the wall.
This result is lachieved by providing as a base or body for the acoustical element a block or slab of a highly sound absorbent material. In the form of the invention which is disclosed herein as being illustrative of the principles thereof I employ a self-sustaining slab of relatively low density fiber board, the same being conventionally formed from wood pulp or other cellulosic fibrous material.
To this base I apply, either by spraying or brushing or in any convenient manner, a coating prepared by mixing an adhesive, usually` an organic glutinous or starchy material with whiting or other pulverant chalky substance with sufcient liquid to form a slurry. After application the coating is permitted to harden and dry thoroughly whereuponthe coating is perforated by the formation of relatively shallow holes in the coated surface of the element, usually by simultaneously piercing the'coating at a number of points. Such piercing of the coating is found to permit sound waves to have access to the exposed sound deadening or absorbing material to a sufficient extent to absorb approximately the same per cent of sound as the same sound absorbing material absorbs when not provided with the finish taught by my present invention.
In the accompanying drawing:
Fig. 1 is a front or face view of an element adapted to be used as an exposed wall element and constructed in accordance with. the principles of my invention, tne several areas of the element being shown to indicate diagrammatically the several steps or operations which comprise my new method of producing an acoustic wall element;
Fig. 2 is a similar vie'w showing the finished element fragmentarily and on an enlarged scale with respect to Fig. 1; and,
Fig. 3 is a fragmentary cross sectional view, on a still further enlarged scale, showing the relatively impervious ,coating and the perforations therethrough.
In Fig. 1 of the drawing the four zones displayed indicate, reading fromtop to bottom, four conditions of the building element occurring serially during the production of the element. The top zone represents the initial untreated block or slab of fibrous material having a high degree of sound and liquid absorption. The next zone represents the block after it has been coated with the relatively impervious coating referred to heretofore. The third zone shows the block after perforations have been formed through the 'coating and in fact shows the completed building element, ready to be incorporated in a building Wall and subsequently decorated in any conventional manner Without having its eiciency as a sound absorbing elementl affected in any way. The fourth zone shows the block as it appears after it has been incorporated in a wall construction and decorated as indicated.
The body of sound absorbing material is designated at l0 in the drawing and in its preferred form comprises what is known in the building art as low density fiber board. This board is conventionally formed by subjecting wet wood pulp or other cellulose fiber pulp to pressure, usually at elevated temperatures. The slabs so .formed are of low density but are sufficiently compact to be self-sustaining and sufiiciently strong and rigid as to be conveniently handled without liability of breakage or disintegration.
Another property of low density ber board is its very high sound absorption. 'I'his quality makes its use as an acoustic material highly advantageous but in the past a marked objection to its use has resided in the fact that it is next to impossible to coat the material because of its very strong tendency to absorb liquids. Again, even if suiiicient paint or the like were applied to form a coating, or if a sufficiently thick material were applied with like result, the board would then lose its sound absorbing quality.
In pursuing my invention I so treat the body of sound insulating material as to not destroy 4its sound absorbing-'ability while making it possible lto apply conventional wall finishes such as paint andthe like to its surface. In proceeding to accomplish thisaim I prepare a slurry or dispersion which in the preferred form comprises an. adhesive orA bindingmaterial which may be starch, casein, soybean flour,v glue, or other material having the indicated properties together with an inorganic ller such as Whiting, precipitated chalk, marl, light-weight; gypsum, .or the like.
\ As specific examples, I may employ an aqueous dispersion which in the dry state comprises soya bean protein' and 90% ller or a dispersion of 50% starch and 50% whiting. i A coating of the dispersion so formed may readily be sprayed or brushed upon a surface of the sound absorbing body and is found to form a layer which is sufficiently impermeable to the vehicles used in conventional paints, of both -the oil and water variety, as to' satisfactorily meet the requirements of the present invention. In the drawing the coating is designated l I.
After the coating has thoroughly dried, I form perforations therethrough. Such perforations are desired to be wholly through the coating but l extend as little as is practically possible into the body of the sound absorbing material itself. As to size, a prime requisite is that the opening so formed be of sufcient diameter or distance across as not to be closed or bridged over by a subsequent painting operation when such paint is applied either by spraying or brushing. It is found that openings approximately alf in diameter give results quite satisfactory from this standpoint.
In the illustrated example, the openings designated at i2 in the drawing are uniformly distributed over the coated surface of the board and in such example I have shown the openings so spaced that they occur approximately seven to the square inch.
The lower zone of Fig. 1 represents the block or board I0 after it has been incorporated in a wall structure andprovided with one or more surface coatings of paint as at I3.
the art of sound deadening and sound insulation particularly. Y
While specific examples ofthe general principle involved in this invention have been referrea to herein, it is tobe understood that a full range of equivalents is in contemplation and that such modifications as appear to those skilled in the art jmay be made without departing from the spirit and scope of my invention as dened in the appended claim I claim:
An acoustic construction comprising a body of low density, compacted, cellulosic fibrous material having a surface thereof coated with a material relatively impervious topaint vehicles and comprising a dispersion of protein and an inorganic ller, said coating being friable by nature and provided with a plurality of perforations whereby the underlying brousmaterial *is par- -without closing or filling said openings and being of a total depth only slightly greater than the thickness of said coating.
=DEAN D. CRANDELL.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US281663A US2326763A (en) | 1939-06-28 | 1939-06-28 | Acoustic material |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US281663A US2326763A (en) | 1939-06-28 | 1939-06-28 | Acoustic material |
Publications (1)
Publication Number | Publication Date |
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US2326763A true US2326763A (en) | 1943-08-17 |
Family
ID=23078267
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US281663A Expired - Lifetime US2326763A (en) | 1939-06-28 | 1939-06-28 | Acoustic material |
Country Status (1)
Country | Link |
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US (1) | US2326763A (en) |
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2562711A (en) * | 1948-02-25 | 1951-07-31 | Interchem Corp | Method of producing heat and sound insulation |
US2838806A (en) * | 1957-06-18 | 1958-06-17 | Celotex Corp | Fireproof acoustical correction panels |
US3103254A (en) * | 1959-01-26 | 1963-09-10 | U S Perlite Corp | Acoustical tile and method of producing the same |
US3324967A (en) * | 1964-09-17 | 1967-06-13 | James P Robinson | Insulating and acoustical panel structure |
US3966526A (en) * | 1973-03-26 | 1976-06-29 | Detroit Gasket & Manufacturing Company | Process for making resilient laminar panel |
US4130175A (en) * | 1977-03-21 | 1978-12-19 | General Electric Company | Fluid-impervious acoustic suppression panel |
WO1989003763A1 (en) * | 1987-10-06 | 1989-05-05 | Snyder Stephen J | Sound attenuation system for jet aircraft engines |
US4926963A (en) * | 1987-10-06 | 1990-05-22 | Uas Support, Inc. | Sound attenuating laminate for jet aircraft engines |
US20040011282A1 (en) * | 2002-07-18 | 2004-01-22 | Myers Robert D. | System and method for manufacturing physical barriers |
US20070119651A1 (en) * | 2005-11-30 | 2007-05-31 | Toyota Boshoku Kabushiki Kaisha | Soundproof material |
US20070186493A1 (en) * | 2006-02-13 | 2007-08-16 | Baig Mirza A | Ceiling tile construction |
US20080029336A1 (en) * | 2006-06-10 | 2008-02-07 | Patrick Sigler | Acoustic panel |
US20130199872A1 (en) * | 2010-10-07 | 2013-08-08 | Lg Hausys, Ltd. | Gypsum panel having outstanding sound-absorbing properties and a production method therefor |
-
1939
- 1939-06-28 US US281663A patent/US2326763A/en not_active Expired - Lifetime
Cited By (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2562711A (en) * | 1948-02-25 | 1951-07-31 | Interchem Corp | Method of producing heat and sound insulation |
US2838806A (en) * | 1957-06-18 | 1958-06-17 | Celotex Corp | Fireproof acoustical correction panels |
US3103254A (en) * | 1959-01-26 | 1963-09-10 | U S Perlite Corp | Acoustical tile and method of producing the same |
US3324967A (en) * | 1964-09-17 | 1967-06-13 | James P Robinson | Insulating and acoustical panel structure |
US3966526A (en) * | 1973-03-26 | 1976-06-29 | Detroit Gasket & Manufacturing Company | Process for making resilient laminar panel |
US4130175A (en) * | 1977-03-21 | 1978-12-19 | General Electric Company | Fluid-impervious acoustic suppression panel |
WO1989003763A1 (en) * | 1987-10-06 | 1989-05-05 | Snyder Stephen J | Sound attenuation system for jet aircraft engines |
US4848514A (en) * | 1987-10-06 | 1989-07-18 | Uas Support, Inc. | Sound attenuation system for jet aircraft engines |
US4926963A (en) * | 1987-10-06 | 1990-05-22 | Uas Support, Inc. | Sound attenuating laminate for jet aircraft engines |
US20060073266A1 (en) * | 2002-07-18 | 2006-04-06 | Myers Robert D | System and method for manufacturing physical barriers |
US20040011282A1 (en) * | 2002-07-18 | 2004-01-22 | Myers Robert D. | System and method for manufacturing physical barriers |
US8647454B2 (en) | 2002-07-18 | 2014-02-11 | Sika Technology Ag | Method for manufacturing physical barriers |
US20070119651A1 (en) * | 2005-11-30 | 2007-05-31 | Toyota Boshoku Kabushiki Kaisha | Soundproof material |
US7690480B2 (en) * | 2005-11-30 | 2010-04-06 | Toyota Boshoku Kabushiki Kaisha | Soundproof material |
US20070186493A1 (en) * | 2006-02-13 | 2007-08-16 | Baig Mirza A | Ceiling tile construction |
US20080216936A1 (en) * | 2006-02-13 | 2008-09-11 | Usg Interiors, Inc. | Ceiling tile construction |
US7703243B2 (en) * | 2006-02-13 | 2010-04-27 | Usg Interiors, Inc. | Ceiling tile construction |
US8147629B2 (en) | 2006-02-13 | 2012-04-03 | Usg Interiors, Llc | Ceiling tile construction |
US20080029336A1 (en) * | 2006-06-10 | 2008-02-07 | Patrick Sigler | Acoustic panel |
US20130199872A1 (en) * | 2010-10-07 | 2013-08-08 | Lg Hausys, Ltd. | Gypsum panel having outstanding sound-absorbing properties and a production method therefor |
US8739927B2 (en) * | 2010-10-07 | 2014-06-03 | Lg Hausys, Ltd. | Gypsum panel having outstanding sound-absorbing properties and a production method therefor |
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