US3084402A - Acoustical panel - Google Patents

Acoustical panel Download PDF

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Publication number
US3084402A
US3084402A US774177A US77417758A US3084402A US 3084402 A US3084402 A US 3084402A US 774177 A US774177 A US 774177A US 77417758 A US77417758 A US 77417758A US 3084402 A US3084402 A US 3084402A
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United States
Prior art keywords
layer
panel
septum
sound
sound absorbing
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
Application number
US774177A
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English (en)
Inventor
Jr Roy E Jordan
Howard D Mays
Karl M Claus
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mosaic Tile Co
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Mosaic Tile Co
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority to LU37880D priority Critical patent/LU37880A1/xx
Application filed by Mosaic Tile Co filed Critical Mosaic Tile Co
Priority to US774177A priority patent/US3084402A/en
Priority to FR808018A priority patent/FR1238674A/fr
Priority to BE584276A priority patent/BE584276A/fr
Priority to GB37466/59A priority patent/GB895394A/en
Application granted granted Critical
Publication of US3084402A publication Critical patent/US3084402A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B9/00—Ceilings; Construction of ceilings, e.g. false ceilings; Ceiling construction with regard to insulation
    • E04B9/22—Connection of slabs, panels, sheets or the like to the supporting construction
    • E04B9/24—Connection of slabs, panels, sheets or the like to the supporting construction with the slabs, panels, sheets or the like positioned on the upperside of, or held against the underside of the horizontal flanges of the supporting construction or accessory means connected thereto
    • E04B9/241—Connection of slabs, panels, sheets or the like to the supporting construction with the slabs, panels, sheets or the like positioned on the upperside of, or held against the underside of the horizontal flanges of the supporting construction or accessory means connected thereto with the slabs, panels, sheets or the like positioned on the upperside of the horizontal flanges of the supporting construction
    • E04B9/244—Connection of slabs, panels, sheets or the like to the supporting construction with the slabs, panels, sheets or the like positioned on the upperside of, or held against the underside of the horizontal flanges of the supporting construction or accessory means connected thereto with the slabs, panels, sheets or the like positioned on the upperside of the horizontal flanges of the supporting construction comprising sealing means between the supporting construction and the slabs, panels, sheets or the like
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B9/00—Ceilings; Construction of ceilings, e.g. false ceilings; Ceiling construction with regard to insulation
    • E04B9/001—Ceilings; Construction of ceilings, e.g. false ceilings; Ceiling construction with regard to insulation characterised by provisions for heat or sound insulation
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B9/00—Ceilings; Construction of ceilings, e.g. false ceilings; Ceiling construction with regard to insulation
    • E04B9/04—Ceilings; Construction of ceilings, e.g. false ceilings; Ceiling construction with regard to insulation comprising slabs, panels, sheets or the like
    • E04B9/045—Ceilings; Construction of ceilings, e.g. false ceilings; Ceiling construction with regard to insulation comprising slabs, panels, sheets or the like being laminated

Definitions

  • This invention relates to acoustic insulating and absorbing panel configurations for the reduction and control of airborne noise.
  • the primary object of the invention is to provide a panel of material having a finished surface of high decorative value and good sound absorbing qualities and at the same time having an excellent acoustic insulating value, the panel being useful for any perimetrical enclosure, and being particularly advantageous for use in ceilings.
  • the most importantpath of transmission may be over the top of the partition.
  • the partition itself can be carefully designed against diaphragmatic action, the doors can be tightly sealed and the fit of the partition to the floor and to the permanent walls can be made acoustically tight to eliminate flanking paths.
  • the real problem thus narrows down to a consideration of the sound transmission properties of the ceilings in the room in which the noise originates and the ceiling in the adjoining room to which it propagates.
  • Modern structures of the non-load bearing wall or partition type usually utilize a dropped or false ceiling so that the space above it is available for ducts, pipes and conduits.
  • a dropped or false ceiling comprising merely a layer of acoustic absorbing material, such as acoustic tile, for example, is ineffective against the transmission of noise out of that room. While the room may itself be so quiet that a normal conversation can be carried on in it pleasantly, the conversation also can be heard very readily in the next room. This is because the sound attenuation through the ceiling of the source room, along the open path above the partition, and through the ceiling of the second or termination room is very low.
  • the transmission loss of a sound absorbing material is very low and only increases directly in proportion to its thickness.
  • the transmission loss of rock wool having an apparent density of five pounds per cuoic foot is about 2 db per inch of thickness at 500 cycles. in order to achieve a reasonable transmission loss, it would be necessary to employ an uneconomic and impractical thickness of wool, say 16* inches or more.
  • a panel comprising the usual thin, acoustically transparent, perforate facing backed by a layer of sound ice absorbing porous material would be expected to have, and does have, a very low transmission loss and is unsuitable for ceiling structures in buildings of the type described above.
  • the transmission loss of a septum r diaphragm follows the laws governing the transmis sion loss of a rigid wall or partition.
  • the transmission loss of a septum or diaphragm would depend for all practical purposes on its mass and would increase about 4-5 db for each doubling of the mass of the diaphragm or septum. Therefore, a thin diaphragm or septum would not be expected to add significantly to the transmission loss of the panel at frequencies within the usually encountered range.
  • the present invention is based on the discovery that a panel having a transmission loss that is many times greater than would be expected from an analysis of the acoustic properties of its components can be made by properly associating a relatively thin layer of sound absorbing material and a thin, lightweight septum with a massive acoustically transparent body. It has been found that the mass effect of the entire panel, and not only the mass of non-porous elements, should be considered in arriving at the transmission loss of sound passing through it.
  • An obg'ect of the invention is to provide an acoustical panel having as one of its elements a massive facing material which has desirable physical characteristics, such as ease of cleaning, color stability, controllable light reflectivity and the like and which panel has an excellent sound transmission loss. All of these physical characteristics required of the facing material are present in ceramic tile.
  • the present invention provides a panel in which ceramic tile is preferably used as a facing material, although a weighted or heavy metal sheet, a dense heavy cernentitious material, or other similarly heavy material, may be alternatively employed.
  • P16. 1 is a vertical sectional view through a building having a ceiling structure constructed in accordance with the present invention
  • FIG. 2 is a fragmentary sectional view of a ceiling panel embodying a preferred form of the invention
  • E16. 3 is a similar fragmentary, vertical sectional view of a ceiling panel embodying a modified form of the invention.
  • FIG. 4 is an elevational view looking inwardly on the line 4- l of FIG. 2;
  • P16. 5 is a view similar to H6. 4 but taken from the position indicated by the line 5-5 of FIG. 3;
  • FIG. 6 is a view similar to H6. 3 showing a ceiling panel embodying another modified form of the invention.
  • the present invention is shown as embodied in a ceiling panel to reduce the sound transmission between rooms A and B. These rooms are separated by a partition C which is carried on a floor D.
  • the roof of the building or the floor above floor D is designated E.
  • New ofiice buildings, schools and similar structures are now being constructed with what has become known as a modular wall construction. In these buildings the walls are non-load bearing and are built to touch a permanently installed but dropped ceiling and it is possible to rearrange the partitions or walls between rooms in almost any desired manner. Space above the ceiling is provided for electricity, heating and ventilating ducts, water conduits and the like. At the present time the acoustical materials which are used in these ceilings do not adeacetates quately prevent the sound transmission from one office space or room into the next.
  • the permanently installed ceiling is designated generally 10 and this is suspended from the roof or upper floor by any suitable means such as hangers 11 terminating in T-bars 12.
  • the ceiling 10 cooperates with the roof or upper floor E to form a plenum space 13 in which the conduits, pipes, etc., above mentioned, are disposed.
  • the plenum space 13 has a depth of at least 10 which therefore forms an air space behind any acoustical ceiling that might be suspended from the hangers 11.
  • the ceiling panel 10 comprises a massive facing layer 14, an intermediate fibrous sound absorbing layer 15 adhered to the facing layer 14 by a layer of adhesive 16, and a septum 17 adhered to the back of the fibrous mass 15 by a layer of adhesive 18.
  • a massive facing layer 14 an intermediate fibrous sound absorbing layer 15 adhered to the facing layer 14 by a layer of adhesive 16
  • a septum 17 adhered to the back of the fibrous mass 15 by a layer of adhesive 18.
  • the facing layer 14 in the preferred form, comprises ceramic tiles cemented or adhered together in side-toside relationship to form a massive continuous ceramic facing panel.
  • the tiles may be adhered by the use of a frit applied thereto and subsequently fired or an organic cement such as an epoxy cement may be used. Such materials when properly applied will give a bond between adjacent tiles that is as strong as the tiles themselves. Thus 4 X 8 sheets of the ceramic tiles can easily be fabricated and utilized in the ceiling panels.
  • each of the ceramic tiles is a modular 4 inches square, thick, and is perforated with A diameter holes on 7 centers. There are thus 81 holes per tile which results in about 14% open area which makes the tile acoustically transparent in the range of frequencies up to about 1000 cycles, with increasing refiection beyond that frequency.
  • the open area of the tile could, of course, be achieved by utilizing an equivalent number and spacing of slots, if desired.
  • Some enhancement of the absorptive effect of the blanket 15, hereinafter described, is obtained by the cylindrical perforations in the thick tile which result in a dynamic resonator effect at frequencies in the range of 500 to 1000 cycles since the hole depth is considerably greater than its diameter.
  • Ceramic tile is, of course, a massive material when utilized in thicknesses of /4 and over in that its weight per square foot is high.
  • the Weight of the tile is about 2% lbs. per square foot.
  • the thickness used in the preferred form is substantially in excess of the thickness of the tile that would be required merely for the structural support of the remainder of the elements of the panel.
  • the ceramic tiles have, of course, many other physical properties which ideally suit them for use as a ceiling material.
  • the tiles are easy to clean, do not absorb odors or moisure and do not require painting or other surface treatment.
  • the present invention utilizes a sound absorbing blanket 15 which may be of any suitable depth and density.
  • the sound absorbing characteristics of the blanket can be changed in accordance with known criteria, and follow very closely the characteristics that would be expected from any blanket of the same material and thickness similarly mounted, except that there is some enhancement due to the dynamic resonator effect of the perforated facing layer 14 at some frequencies. Measurements show that the blanket 15 is more effective when used with the facing layer of tile than without at frequencies in the 500-1000 cycle range.
  • the fid. brous layer 15 comprises a glass fiber board having an apparent density of 6 lbs. per cubic foot, and the layer is 1%" thick.
  • the sound absorbing layer 15, which is illustrated as fibrous, is a unitary, interstioed mass and is adhered to the facing layer and septum vas a unit possessing structural integrity in that adhesion of its surface components, for example, the surface segments of the fibers, to either the facing layer or the septum adheres the entire layer 15 thereto.
  • the preferred embodiment is glass fiber wool, densified by compression and the fibers bonded together by a binder to form a substantially stiff, at least semi-rigid, botardlike mass. The stiffness of such sound absorbing materials, of course, depends upon their thickness, constituents and density.
  • the septum 17 may take sevenal different forms. It is only necessary that the septum be continuous in its area and that it be effectively continuously adhered to the fibrous layer 15 which, in turn, is adhered to the facing layer 14.
  • One form of septum that has been successfully used comprises a As" sheet of compressed and bonded wood fibers such as is commercially kown as Masonite.
  • a ceiling made up of a number of panels abutted against each other in edge t-o-edge relationship, it is prefenable to assure that there is no leakage path for sound through the edge of a panel or between the edges of a panel and its supporting member. Closure of this edge leakage path can be readily accomplished by taping the exposed sides of the fibrous blanket 15 with an air impervious sheet material 20 such as cloth, metal foil or plastic having an adhesive on one side. Further, the air leakage around the taped panel may be reduced by using a compressible substance between the bot-tom. of the ceramic tile and the horizontal face of the T-bar, as indicated at 20a in FIG. 2. This will effectively prevent air leakage, and thus sound leak-age, past the sides of the panel into the plenum space .13.
  • Hour foot square specimen Acoustic tile panels, 24" X 48", comprised of 4 square Acoustic Wall Tile 7 thick, perforated with W d-ia. holes, 7 0.0., 81 per tile (14% open area), backed with 1% thick Fiberglas board, 6 lbs/cu. ft. density and /s" tempered Masonite. Specimen comprised of two panels with joint simulating that of an exposed-T suspension system, outer periphery clamped in place without caulking.
  • the attenuation of sound originating in room A would be expected to approximate. 28 db before its entry into the plenum space 13.
  • a similar attenuation would be expected between the plenum space and room B in connection with the re-entry of the sound.
  • the attennation from room A to room B may be conservatively expected to exceed 40 db, and the acoustic insulation derived from the ceiling structure would thus equal or surpass the acoustic insulation derived from the partition between the two noo-ms.
  • partition manufacturers strive to achieve a 40 db transmission loss, and consider this to be acceptable.
  • an acoustic absorbing material on the face of the roof or floor body E as indicated at 21 (FIG. 1). This will depend on the nature of the installation and such factors as the depth of the plenum space.
  • a secondary septum extending at right angles to the facing layer and indicated at 22 in FIG. 1 should also be used.
  • This septum 22 should be located immediately over the partition C. The placing of this secondary septum 22 requires only that a slot be made from the rear of the panel through the primary septum 117 and fibrous layer 15 and that a piece of Masonite or similar material be coated with an adhesive substance and forced into the slot. This will give ample adhesion between the secondary septum 22 and the fibrous layer 15.
  • FIGS. 3 and 5 show a modified form of the invention comprising a metal pan 30 having drawn or formed, inwardly extending cylindrical hollow nipples 31 which correspond in form and effect to the perforations in the tile of FIGS. 1 and 2. Additional mass can be imparted to the metal pan either by filling the space between the inwardly extending nipples 31 with a heavy material such as plaster 32 or by increasing the gauge of the metal of which the facing layer 30 is formed.
  • the resulting facing layer should have, for comparable results, substantially the same mass as the layer of ceramic tile 14 previously described.
  • FIG. 3 also shows the use of gasketing material 33 along the vertical leg of the T-bar suspension and adhered to the T-bar.
  • This material 33 is preferably put under compression by the setting of the ceiling panels so that the possibility of transmitting sound through the space between the T-bars and the panel is reduced to a minimum.
  • the fibrous material 34 is adhered to the facing layer 30 by a layer of adhesive 35 and a continuous septum 36 is provided which is adhered to the back face of the fibrous material layer 34 by a layer 37 of suitable adhesive.
  • a secondary septum 38 over the partition should be employed.
  • the septum is designated 39 and comprises a layer of metal foil or a layer of plastic material.
  • the metal foil or plastic sheet is overlapped from one panel section to the next as shown at 46. This will also effectively prevent transmission of sound past the edges of the septum and into the plenum space.
  • each panel comprises a layer of facing material 4 1 to which is continuously adhered a layer of fibrous material 42 to which the septum 39 in continuously adhered. Adjacent panels are similarly supported by T-bars 43.
  • the term continuously adhered means that the adhesive employed contacts the surface of the facing layer between the perforations and contacts the surface segments of the sound absorbing material and the adhesive which continuously adheres the septum also contacts the surface segments of the sound absorbing layer, both adhesions extending over the entire areas involved.
  • An acoustical panel according to the invention as above described possesses the transmission loss characteristics of a rigid partition of an equivalent or greater mass similarly jointed and at the same time possesses accoustic absorbing properties equivalent to or greater than a fibrous blanket of similar thickness.
  • the usual rigid partition has of course a very low noise reduction coefficient, and the usual fibrous blanket has, of course, a very low transmission loss.
  • An acoustical panel having a high transmission loss and high noise reduction coeflicient said panel comprising, a perforate, substantially sound transparent, facing layer, the perforations therein having a total area in excess of ten percent of the total area of said layer and consisting of a rigid body having a mass per unit of area substantially in excess of that required for structural support of the remainder of the elements of the panel, a structurally integral layer of sound absorbing material, a discrete thin layer of adhesive continuously adhering said layer of sound absorbing material to the back surface of said facing layer, a continuous, air-impervious septum consisting of a sheet of material having independent structural unity, and a discrete thin layer of adhesive continuously adhering said septum to the back surface of said sound absorbing layer.
  • An acoustical ceiling structure having a transmission loss in excess of 20 db, and a noise reduction coefficient in excess of 0.70 comprising a T-bar suspension system and acoustical panels supported thereby, each of said panels comprising a perforate facing layer of ceramic tile, the perforations therein having a total area in excess of ten percent of the total area of said tile and a mass and rigidity substantially in excess of that required for structural support, said facing layer lying on the horizontal elements of the associated ones of said T-bars and serving as the structural element of said panel, a structurally integral layer of sound absorbing fibrous material, a discrete thin layer of adhesive continuously adhering said layer of sound absorbing material to the back surface of said facing layer, a continuous, air impervious septum consisting of a sheet of material having independent structural unity, a discrete thin layer of adhesive continuously adhering said septum to the back surface of said layer of sound absorbing material, and means at the edges of each of said panels for preventing the leakage of sound through
  • An acoustical panel having a high transmission loss and noise reduction coefiicient comprising, in combination, a facing layer consisting of a sheet of substantially sound transparent, perforated, ceramic tile, the perforations therein having a total area in excess of ten percent of the total area of said layer and the sheet being rigid and having a mass substantially in excess of that required for structural support, a layer of sound absorbing material consisting of a densified boardlike mass of intersticed glass fiber Wool, a discrete thin layer of adhesive continuously adhering said sound absorbing layer to the back surface of said facinglayer with the adhesive contacting the surface segments of said sound absorbing material and the back face of said facing layer between the perforations thereof, a continuous, air impervious septum and a discrete thin layer of adhesive continuously adhering said septum to the back surface of said sound absorbing layer with the adhesive contacting the surface segments of the fibers thereof and the surface of said septum over the entire area involved, said septum being fabricated from independently structurally unit
  • septum is a thin, lightweight, air impervious flexible sheet metal and the septum also extends around the edges of at least the sound absorbing. layer and is ad hered to the surface segments of the fibers thereof.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Building Environments (AREA)
US774177A 1958-11-17 1958-11-17 Acoustical panel Expired - Lifetime US3084402A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
LU37880D LU37880A1 (fr) 1958-11-17
US774177A US3084402A (en) 1958-11-17 1958-11-17 Acoustical panel
FR808018A FR1238674A (fr) 1958-11-17 1959-10-20 Panneau insonore
BE584276A BE584276A (fr) 1958-11-17 1959-11-03 Panneau insonore
GB37466/59A GB895394A (en) 1958-11-17 1959-11-04 An improved acoustic panel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US774177A US3084402A (en) 1958-11-17 1958-11-17 Acoustical panel

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US3084402A true US3084402A (en) 1963-04-09

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US (1) US3084402A (fr)
BE (1) BE584276A (fr)
FR (1) FR1238674A (fr)
GB (1) GB895394A (fr)
LU (1) LU37880A1 (fr)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3246063A (en) * 1961-02-10 1966-04-12 United States Gypsum Co Method of making an acoustical tile and ceiling construction
US3325954A (en) * 1964-01-13 1967-06-20 Wood Conversion Co Ventilating ceiling and resilient foam sealing means therefor
US4441580A (en) * 1980-10-17 1984-04-10 Steelcase Inc. Acoustical control media
US4614553A (en) * 1984-05-29 1986-09-30 Allred John C Method of manufacturing acoustic panels for controlling reverberation of sound in enclosed environments
US4638616A (en) * 1985-09-26 1987-01-27 Fredericks Chester P Thermally insulative self-supporting panel
US4832152A (en) * 1988-03-22 1989-05-23 Herman Miller, Inc. Acoustic tile
US20060065481A1 (en) * 2004-09-24 2006-03-30 Lear Corporation Perforated hard trim for sound absorption
NL1030971C2 (nl) * 2006-01-20 2007-07-23 Coatacoustic B V Akoestisch plaatelement, alsmede plafond of wand met een dergelijk plaatelement.
US20070193175A1 (en) * 2006-02-21 2007-08-23 Ta-Chung Hao Structure of decoration acoustic board
ES2336994A2 (es) * 2008-04-25 2010-04-19 Cupa Innovacion, S.L.U. Mejoras en la patente n.200801202 relativa a un recubrimiento interior para techos.
DE102008061281A1 (de) * 2008-12-11 2010-06-17 Becker Gmbh & Co. Kg Schalldämmung für mobile Trennwände
US20130019393A1 (en) * 2011-07-22 2013-01-24 Lamberson Roger E Portable Spa Insulation Method and Apparatus
US20190024370A1 (en) * 2017-07-18 2019-01-24 Robert E. Wiggins Multi-position mounting system for wall panels and hangings
US20210131095A1 (en) * 2017-03-05 2021-05-06 Niels Werner Adelmann-Larsen Variable acoustic technology for rooms

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2125843A (en) * 1982-08-26 1984-03-14 Coolag Ltd Seal for insulator panels
DE8716596U1 (de) * 1987-12-16 1988-02-04 Stotmeister GmbH, 7894 Stühlingen Schallschluckendes Deckenelement für den Aufbau einer fugenlosen Akustikdecke

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BE524931A (fr) * 1952-04-16
US1910628A (en) * 1925-07-21 1933-05-23 Manville Johns Inc Architectural acoustical construction
US1926679A (en) * 1932-01-25 1933-09-12 Johns Manville Acoustical construction
US1994439A (en) * 1932-07-30 1935-03-12 Burgess Lab Inc C F Sound absorbing construction
US2045313A (en) * 1933-10-04 1936-06-23 United States Gypsum Co Acoustical wall covering
US2077713A (en) * 1936-02-24 1937-04-20 Donald F Ross Acoustical material
US2132032A (en) * 1936-07-08 1938-10-04 Jacobsen Aage Alex Partition wall
US2177393A (en) * 1937-06-08 1939-10-24 Johns Manville Sound absorbing structure
US2200382A (en) * 1938-03-08 1940-05-14 Pittsburgh Plate Glass Co Facing unit
US2350513A (en) * 1940-12-30 1944-06-06 Burgess Manning Co Sound barrier wall or door construction
GB588498A (en) * 1945-10-05 1947-05-22 Bert Inkley Improvements in supports and suspension means for wall and ceiling lining boards, sheets or slabs
US2450911A (en) * 1943-07-20 1948-10-12 Armstrong Cork Co Acoustical structure
FR1004606A (fr) * 1949-09-10 1952-04-01 Perfectionnements aux matériaux d'insonorisation
US2692219A (en) * 1951-07-05 1954-10-19 Owens Corning Fiberglass Corp Structural panel
US2767440A (en) * 1955-02-14 1956-10-23 United States Gypsum Co Suspended ceiling construction
US2779979A (en) * 1953-03-16 1957-02-05 Barclay Mfg Co Inc Wall and wall unit construction
US2802764A (en) * 1952-10-08 1957-08-13 Owens Corning Fiberglass Corp Acoustical material
US2824618A (en) * 1956-07-27 1958-02-25 William L Hartsfield Sound absorbing wall panels
US2829790A (en) * 1952-10-15 1958-04-08 Albert M Fischer Bottle closures

Patent Citations (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1910628A (en) * 1925-07-21 1933-05-23 Manville Johns Inc Architectural acoustical construction
US1926679A (en) * 1932-01-25 1933-09-12 Johns Manville Acoustical construction
US1994439A (en) * 1932-07-30 1935-03-12 Burgess Lab Inc C F Sound absorbing construction
US2045313A (en) * 1933-10-04 1936-06-23 United States Gypsum Co Acoustical wall covering
US2077713A (en) * 1936-02-24 1937-04-20 Donald F Ross Acoustical material
US2132032A (en) * 1936-07-08 1938-10-04 Jacobsen Aage Alex Partition wall
US2177393A (en) * 1937-06-08 1939-10-24 Johns Manville Sound absorbing structure
US2200382A (en) * 1938-03-08 1940-05-14 Pittsburgh Plate Glass Co Facing unit
US2350513A (en) * 1940-12-30 1944-06-06 Burgess Manning Co Sound barrier wall or door construction
US2450911A (en) * 1943-07-20 1948-10-12 Armstrong Cork Co Acoustical structure
GB588498A (en) * 1945-10-05 1947-05-22 Bert Inkley Improvements in supports and suspension means for wall and ceiling lining boards, sheets or slabs
FR1004606A (fr) * 1949-09-10 1952-04-01 Perfectionnements aux matériaux d'insonorisation
US2692219A (en) * 1951-07-05 1954-10-19 Owens Corning Fiberglass Corp Structural panel
BE524931A (fr) * 1952-04-16
US2802764A (en) * 1952-10-08 1957-08-13 Owens Corning Fiberglass Corp Acoustical material
US2829790A (en) * 1952-10-15 1958-04-08 Albert M Fischer Bottle closures
US2779979A (en) * 1953-03-16 1957-02-05 Barclay Mfg Co Inc Wall and wall unit construction
US2767440A (en) * 1955-02-14 1956-10-23 United States Gypsum Co Suspended ceiling construction
US2824618A (en) * 1956-07-27 1958-02-25 William L Hartsfield Sound absorbing wall panels

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3246063A (en) * 1961-02-10 1966-04-12 United States Gypsum Co Method of making an acoustical tile and ceiling construction
US3325954A (en) * 1964-01-13 1967-06-20 Wood Conversion Co Ventilating ceiling and resilient foam sealing means therefor
US4441580A (en) * 1980-10-17 1984-04-10 Steelcase Inc. Acoustical control media
US4614553A (en) * 1984-05-29 1986-09-30 Allred John C Method of manufacturing acoustic panels for controlling reverberation of sound in enclosed environments
US4638616A (en) * 1985-09-26 1987-01-27 Fredericks Chester P Thermally insulative self-supporting panel
US4832152A (en) * 1988-03-22 1989-05-23 Herman Miller, Inc. Acoustic tile
US20060065481A1 (en) * 2004-09-24 2006-03-30 Lear Corporation Perforated hard trim for sound absorption
NL1030971C2 (nl) * 2006-01-20 2007-07-23 Coatacoustic B V Akoestisch plaatelement, alsmede plafond of wand met een dergelijk plaatelement.
US20070193175A1 (en) * 2006-02-21 2007-08-23 Ta-Chung Hao Structure of decoration acoustic board
ES2336994A2 (es) * 2008-04-25 2010-04-19 Cupa Innovacion, S.L.U. Mejoras en la patente n.200801202 relativa a un recubrimiento interior para techos.
ES2336990A2 (es) * 2008-04-25 2010-04-19 Cupa Innovacion, S.L.U. Recubrimiento interior de techos.
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Also Published As

Publication number Publication date
FR1238674A (fr) 1960-08-12
LU37880A1 (fr)
BE584276A (fr) 1960-03-01
GB895394A (en) 1962-05-02

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