US20030102184A1 - Acoustical support panel - Google Patents

Acoustical support panel Download PDF

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Publication number
US20030102184A1
US20030102184A1 US09/999,259 US99925901A US2003102184A1 US 20030102184 A1 US20030102184 A1 US 20030102184A1 US 99925901 A US99925901 A US 99925901A US 2003102184 A1 US2003102184 A1 US 2003102184A1
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United States
Prior art keywords
support panel
acoustical
membrane
panel according
base
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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.)
Abandoned
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US09/999,259
Inventor
Mario Brisson
Sebastien Gagnon
Michel Smith
Berthier Roy
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Materiaux Cascades Inc
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Materiaux Cascades Inc
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Publication date
Priority to CA002363828A priority Critical patent/CA2363828A1/en
Application filed by Materiaux Cascades Inc filed Critical Materiaux Cascades Inc
Priority to US09/999,259 priority patent/US20030102184A1/en
Publication of US20030102184A1 publication Critical patent/US20030102184A1/en
Abandoned legal-status Critical Current

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B25/00Layered products comprising a layer of natural or synthetic rubber
    • B32B25/10Layered products comprising a layer of natural or synthetic rubber next to a fibrous or filamentary layer
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04FFINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F15/00Flooring
    • E04F15/18Separately-laid insulating layers; Other additional insulating measures; Floating floors
    • E04F15/20Separately-laid insulating layers; Other additional insulating measures; Floating floors for sound insulation
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04FFINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F15/00Flooring
    • E04F15/18Separately-laid insulating layers; Other additional insulating measures; Floating floors
    • E04F15/20Separately-laid insulating layers; Other additional insulating measures; Floating floors for sound insulation
    • E04F15/206Layered panels for sound insulation

Definitions

  • the present invention relates to a panel, and more particularly to an acoustical support panel and a process for manufacturing same. More specifically, the present invention is concerned with an acoustical support panel which can be obtained by laminating a membrane of resilient material such as rubber, on a base of compression resistant cellulose fibers, and the use of said panel to provide a specific support for the mounting of a wood flooring, tile, vinyl, carpet or installing a rug, for example.
  • U.S. Pat. No. 2,542,428 describes a sound-deadening structure including a sheet of rubber material formed with projections on one face thereof, and a layer of flowable setting material having the projections embedded therein.
  • U.S. Pat. No. 2,802,764 is concerned with an acoustical material consisting of a slab of glass fibers covered with an impervious resinous membrane which shrinks when subjected to heat.
  • U.S. Pat. No. 2,874,796 describes a method of fabricating a sound absorbing unit having artificial openings therein, by applying a boric acid solution to a surface of the formed body.
  • U.S. Pat. No. 3,961,682 describes a sound-absorbing wall element including a plurality of layers, one of them being made from shredded used tires.
  • the other layer may include a sound absorbing material such as mineral wool.
  • U.S. Pat. No. 4,253,543 describes a device for the absorption of airborne sound which includes an air permeable base layer and an impervious membrane applied to the base layer. This patent does not disclose a rubber membrane laminated on a cellulose base.
  • U.S. Pat. No. 4,570,748 discloses a volume-changing resonator in the form of a sound silencer which has a surface made of rubber.
  • U.S. Pat. No. 4,709,781 concerns a sound-damping and heat-insulating composite plate which includes a porous core made of rubber granules or scrap, which is disposed between two layers of metals.
  • U.S. Pat. No. 4,989,688 describes an acoustical panel consisting of a rigid frame in which there is an insulation medium, such as fiberglass, cellulose, and the like. The outer surfaces of the cell grid are covered with a skin or screen mesh for confining the loose discrete insulation.
  • an acoustical support panel which comprises a membrane of resilient material, and a base of compression resistant cellulose fibers, the membrane being laminated on the base under conditions to constitute the panel.
  • the membrane is preferably made of resilient rubber material. In practice, it has been found that a membrane consisting of shredded used tires is entirely satisfactory.
  • the membrane may be of any suitable thickness as will be appreciated by one skilled in the art. However, in practice it has been found that the membrane may be between about 0.1 and 0.25 inch, preferably 0.14 inch, it being understood that any value outside the above range would be acceptable, without departing from the scope and spirit of the present invention, provided the desired insulation can be obtained.
  • Another property of the membrane is its density. It has been found that it is highly desirable, although not essential, that the density be between about 18 and 30 lbs./ft 3 , preferably about 22 lbs./ft 3 .
  • the membrane of resilient material should preferably have a retention (50 Kpa load) according to ASTMD-1055 of about 50% and a retention (100 Kpa load) according to ASTMD-1055 of about 40%.
  • the base of compression resistant cellulose fibers is preferably made of wood fibers. Although its thickness may vary to a large extent as will be appreciated by one skilled in the art, it is normally between about 0.3 and about 1.0 inch thick, preferably about 0.4 inch.
  • a preferred property of the base is a compression strength at 10% deformation of about 45 lbs./in 2 , although this value may vary to a large extent again as will be appreciated by one skilled in the art.
  • Another property is the water absorption of the base which may be set at about 5% P/V although any other suitable value below 10% P/V is within the scope of the present invention.
  • Another preferred property is the linear expansion of the base which may be set at about 0.08% although any other suitable value is within the scope of the present invention.
  • acoustical support panel according to the invention is a transverse load rupture which should be about 12 lbs.
  • the acoustical support panel according to the invention may be manufactured by providing a membrane of resilient material, providing a base of compression resistant cellulose fibers, and laminating the membrane on the base under conditions to constitute the panel.
  • FIG. 1 is a cross-section view of an acoustical support panel according to the invention.
  • FIG. 2 is a schematic illustration of the mounting of a hardwood flooring utilizing an acoustical support panel according to the invention
  • FIG. 3 is a schematic illustration of another possible arrangement for a hardwood flooring provided with an acoustical support panel according to the invention.
  • FIG. 4 is an enlarged view of a resilient channel to mount the I-beams illustrated in FIG. 2.
  • an acoustical support panel according to the invention comprises a membrane a of shredded used tires which is laminated on a base b of compression resistant wood fibers. Lamination is of course achieved by using a glue, the choice of which is entirely left to one skilled in the art.
  • FIG. 2 illustrates a hardwood floor mounting according to the invention
  • I-beams 3 or other joists type two of which are shown in the drawings, and each is 14 inch high.
  • the structure and size of the I-beams or other joists type can vary depending on the choice of the designer of the floor structure.
  • the beams there are mounted two sheets of gypsum 7 , 9 , 5 ⁇ 8 inch thick each. These two sheets may constitute the ceiling of a room below. Between the base of I-beams 3 and the two sheets of gypsum 7 , 9 , there are provided resilient channel bars 10 which are fixed by means of a screwing device 10 a extending through gypsum sheets 7 , 9 into I-beams 3 at the base thereof. These channel bars 10 are used to hold I-beams 3 and to absorb shocks produced by sonic vibrations.
  • a board 11 of Aspenite® for example, or tongue and groove plywood, 5 ⁇ 8 inch thick, a layer of concrete 13 , 11 ⁇ 2 inch thick, an acoustical support panel 15 according to the invention, bearing joist 17 and finally floorboards 19 .
  • a cellulose, glass, or rock wool or the like insulating material 21 well known to those skilled in the art, fills the space between I-beams 3 above sheets of gypsum 7 , 9 and below the board of Aspenite®. This arrangement is of course mounted in a manner well known to those skilled in the art.
  • the acoustical panel according to this embodiment is intended to be mounted on a base 23 of light concrete, preferably 8 inches thick.
  • the acoustical panel 25 is the same as the one illustrated in FIG. 1, except that the order is reversed in that membrane a of shredded used tires is at the bottom and is placed directly on light concrete base 23 , while layer b of wood fibers is at the top as shown.
  • Laths 27 preferably ⁇ fraction (7/16) ⁇ inch thick (slightly less thick than panel 25 ) are placed 6 inches apart over panel 25 as shown.
  • a typical acoustical panel according to the invention is described in the following table, wherein the panel is 4′ ⁇ 8′ ⁇ fraction (17/32) ⁇ ′′.
  • PHYSICAL PROPERTIES Method norm Value Rubber Composition recycled tires Thickness ASTM D-1037 0.138′′ Density ASTM D-1037 22 lbs./ft 3 Retention (load of 50 Kpa) ASTM D-1055 50% (load of 100 Kpa) ASTM D-1055 40% Wood fiber panel Composition: wood fiber Thickness ASTM D-1037 0.409′′ Water absorption ASTM C-209 5% P/V max Compression strength ASTM C-165 45 lbs./in 2 at 10% deformation Linear ASTM C-209 0.08% expansion Transverse ASTM C-209 12 lbs. load at rupture

Abstract

The acoustical support panel according to the invention comprises a membrane of resilient material, such as one obtained with shredded used tires, which is laminated on a base of compression resistant cellulose fibers. This panel has shown a noted increase of insulation from impact and aerial noises. It has an excellent dimensional stability and high resistance to compression.

Description

    BACKGROUND OF THE INVENTION
  • (a) Field of the Invention [0001]
  • The present invention relates to a panel, and more particularly to an acoustical support panel and a process for manufacturing same. More specifically, the present invention is concerned with an acoustical support panel which can be obtained by laminating a membrane of resilient material such as rubber, on a base of compression resistant cellulose fibers, and the use of said panel to provide a specific support for the mounting of a wood flooring, tile, vinyl, carpet or installing a rug, for example. [0002]
  • (b) Description of Prior Art [0003]
  • In modern construction, especially in homes and apartment buildings as well as in office buildings, no efforts should be spared to ensure that the floors and ceilings are acoustically insulated. In practice, a slab of concrete with a substantial thickness can provide some acoustical insulation, however this is far from being satisfactory and economical. [0004]
  • A number of U.S. patents describe acoustical materials which are capable of absorbing sounds, however to Applicants knowledge none of them teach an acoustical support panel which absorbs sounds with a high degree of satisfaction and at a reasonable cost. [0005]
  • U.S. Pat. No. 2,542,428 describes a sound-deadening structure including a sheet of rubber material formed with projections on one face thereof, and a layer of flowable setting material having the projections embedded therein. [0006]
  • U.S. Pat. No. 2,802,764 is concerned with an acoustical material consisting of a slab of glass fibers covered with an impervious resinous membrane which shrinks when subjected to heat. [0007]
  • U.S. Pat. No. 2,874,796 describes a method of fabricating a sound absorbing unit having artificial openings therein, by applying a boric acid solution to a surface of the formed body. [0008]
  • U.S. Pat. No. 3,961,682 describes a sound-absorbing wall element including a plurality of layers, one of them being made from shredded used tires. The other layer may include a sound absorbing material such as mineral wool. [0009]
  • U.S. Pat. No. 4,253,543 describes a device for the absorption of airborne sound which includes an air permeable base layer and an impervious membrane applied to the base layer. This patent does not disclose a rubber membrane laminated on a cellulose base. [0010]
  • U.S. Pat. No. 4,570,748 discloses a volume-changing resonator in the form of a sound silencer which has a surface made of rubber. [0011]
  • U.S. Pat. No. 4,709,781 concerns a sound-damping and heat-insulating composite plate which includes a porous core made of rubber granules or scrap, which is disposed between two layers of metals. [0012]
  • U.S. Pat. No. 4,989,688 describes an acoustical panel consisting of a rigid frame in which there is an insulation medium, such as fiberglass, cellulose, and the like. The outer surfaces of the cell grid are covered with a skin or screen mesh for confining the loose discrete insulation. [0013]
  • It will therefore be seen that the prior art does not teach an acoustical support panel which is easy and inexpensive to produce, and which at the same time is highly efficient. [0014]
  • It is an object of the present invention to provide an acoustical support panel which is specifically designed for mounting wood floorings, ceramic, tile, carpet and the like. [0015]
  • It is another object of the present invention to provide an acoustical support panel which shows a noted increase of insulation from impact noises and aerial noises. [0016]
  • It is another object of the present invention to provide a simple method for preparing acoustical support panels which can be used in the construction of homes, office buildings and the like. [0017]
  • SUMMARY OF THE INVENTION
  • These and other objects of the present invention may be achieved by providing an acoustical support panel which comprises a membrane of resilient material, and a base of compression resistant cellulose fibers, the membrane being laminated on the base under conditions to constitute the panel. [0018]
  • The membrane is preferably made of resilient rubber material. In practice, it has been found that a membrane consisting of shredded used tires is entirely satisfactory. [0019]
  • The membrane may be of any suitable thickness as will be appreciated by one skilled in the art. However, in practice it has been found that the membrane may be between about 0.1 and 0.25 inch, preferably 0.14 inch, it being understood that any value outside the above range would be acceptable, without departing from the scope and spirit of the present invention, provided the desired insulation can be obtained. [0020]
  • Another property of the membrane is its density. It has been found that it is highly desirable, although not essential, that the density be between about 18 and 30 lbs./ft[0021] 3, preferably about 22 lbs./ft3.
  • In accordance with another embodiment, the membrane of resilient material should preferably have a retention (50 Kpa load) according to ASTMD-1055 of about 50% and a retention (100 Kpa load) according to ASTMD-1055 of about 40%. [0022]
  • The base of compression resistant cellulose fibers is preferably made of wood fibers. Although its thickness may vary to a large extent as will be appreciated by one skilled in the art, it is normally between about 0.3 and about 1.0 inch thick, preferably about 0.4 inch. [0023]
  • A preferred property of the base is a compression strength at 10% deformation of about 45 lbs./in[0024] 2, although this value may vary to a large extent again as will be appreciated by one skilled in the art.
  • Another property is the water absorption of the base which may be set at about 5% P/V although any other suitable value below 10% P/V is within the scope of the present invention. [0025]
  • Another preferred property is the linear expansion of the base which may be set at about 0.08% although any other suitable value is within the scope of the present invention. [0026]
  • Finally, another preferred property of the acoustical support panel according to the invention is a transverse load rupture which should be about 12 lbs. [0027]
  • In accordance with another embodiment, the acoustical support panel according to the invention may be manufactured by providing a membrane of resilient material, providing a base of compression resistant cellulose fibers, and laminating the membrane on the base under conditions to constitute the panel.[0028]
  • BRIEF DESCRIPTION OF THE DRAWINGS
  • The invention is illustrated by means of the annexed drawings in which: [0029]
  • FIG. 1 is a cross-section view of an acoustical support panel according to the invention; [0030]
  • FIG. 2 is a schematic illustration of the mounting of a hardwood flooring utilizing an acoustical support panel according to the invention; [0031]
  • FIG. 3 is a schematic illustration of another possible arrangement for a hardwood flooring provided with an acoustical support panel according to the invention; and [0032]
  • FIG. 4 is an enlarged view of a resilient channel to mount the I-beams illustrated in FIG. 2.[0033]
  • DESCRIPTION OF PREFERRED EMBODIMENTS
  • As shown in FIG. 1, an acoustical support panel according to the invention comprises a membrane a of shredded used tires which is laminated on a base b of compression resistant wood fibers. Lamination is of course achieved by using a glue, the choice of which is entirely left to one skilled in the art. [0034]
  • With reference more particularly to FIG. 2, which illustrates a hardwood floor mounting according to the invention, it will be seen that there is first provided a plurality of I-[0035] beams 3 or other joists type, two of which are shown in the drawings, and each is 14 inch high. Of course, the structure and size of the I-beams or other joists type can vary depending on the choice of the designer of the floor structure.
  • Underneath the beams, there are mounted two sheets of [0036] gypsum 7, 9, ⅝ inch thick each. These two sheets may constitute the ceiling of a room below. Between the base of I-beams 3 and the two sheets of gypsum 7,9, there are provided resilient channel bars 10 which are fixed by means of a screwing device 10 a extending through gypsum sheets 7,9 into I-beams 3 at the base thereof. These channel bars 10 are used to hold I-beams 3 and to absorb shocks produced by sonic vibrations.
  • Above [0037] beams 3, there is first provided a board 11 of Aspenite® for example, or tongue and groove plywood, ⅝ inch thick, a layer of concrete 13, 1½ inch thick, an acoustical support panel 15 according to the invention, bearing joist 17 and finally floorboards 19. Finally, it will be realized that a cellulose, glass, or rock wool or the like insulating material 21 well known to those skilled in the art, fills the space between I-beams 3 above sheets of gypsum 7,9 and below the board of Aspenite®. This arrangement is of course mounted in a manner well known to those skilled in the art.
  • It was found that with the insertion of an [0038] acoustical support panel 15 according to the present invention, there is a noted increase of the insulation capacity from impact and aerial noises to FIIC=55, as compared to known insulation techniques.
  • Turning now to FIG. 3, it will be seen that the acoustical panel according to this embodiment is intended to be mounted on a [0039] base 23 of light concrete, preferably 8 inches thick. The acoustical panel 25 is the same as the one illustrated in FIG. 1, except that the order is reversed in that membrane a of shredded used tires is at the bottom and is placed directly on light concrete base 23, while layer b of wood fibers is at the top as shown. Laths 27, preferably {fraction (7/16)} inch thick (slightly less thick than panel 25) are placed 6 inches apart over panel 25 as shown. Then pieces of panel 25, 6 inches wide, referred to as members 29, with layer a oriented at the top, are glued in known manner over panel 25 between laths 27, as shown. This arrangement gives a FIIC of 56. The same results have been noted as in the arrangement of FIG. 2, with respect to impact and aerial noises.
  • A typical acoustical panel according to the invention is described in the following table, wherein the panel is 4′×8′×{fraction (17/32)}″. [0040]
    PHYSICAL PROPERTIES
    Method norm Value
    Rubber
    Composition: recycled tires
    Thickness ASTM D-1037 0.138″
    Density ASTM D-1037 22 lbs./ft3
    Retention
    (load of 50 Kpa) ASTM D-1055 50%
    (load of 100 Kpa) ASTM D-1055 40%
    Wood fiber panel
    Composition: wood fiber
    Thickness ASTM D-1037 0.409″
    Water
    absorption ASTM C-209 5% P/V max
    Compression strength ASTM C-165 45 lbs./in2
    at 10% deformation
    Linear ASTM C-209 0.08%
    expansion
    Transverse ASTM C-209 12 lbs.
    load at rupture
  • The above invention is not limited to the above embodiment except as defined in the appended claims. [0041]

Claims (17)

We claim:
1. An acoustical support panel comprising
a membrane of resilient material, and
a base of compression resistant cellulose fibers,
said membrane being laminated on said base under conditions to constitute said panel.
2. Acoustical support panel according to claim 1, wherein said membrane is made of resilient rubber material.
3. Acoustical support panel according to claim 2, wherein said resilient rubber material comprises recycled tire material.
4. Acoustical support panel according to claim 1, wherein said membrane of resilient material has a thickness between about 0.1 and 0.25 inch.
5. Acoustical support panel according to claim 4, wherein said membrane of resilient material has a thickness of about 0.14 inch.
6. Acoustical support panel according to claim 1, wherein said membrane of resilient material has a density between 18 and 30 lbs./ft3.
7. Acoustical support panel according to claim 6, wherein said membrane of resilient material has a density of about 22 lbs./ft3.
8. Acoustical support panel according to claim 1, wherein said membrane of resilient material has a retention (50 Kpa load) according to ASTIM D-1055 of about 50% and a retention (100 Kpa load) according to ASTM D-1055 of about 40%.
9. Acoustical support panel according to claim 1, wherein said base is made of wood fibers.
10. Acoustical support panel according to claim 1, wherein said base has a thickness between about 0.3 and about 1.0 inch.
11. Acoustical support panel according to claim 10, wherein said base has a thickness of about 0.4 inch.
12. Acoustical support panel according to claim 1, wherein said base has a compression strength at 10% deformation of about 45 lbs./in2.
13. Acoustical support panel according to claim 1, wherein said base has a linear expansion of about 0.08%. and a water absorption of about 5% P/V.
14. Acoustical support panel according to claim 1, wherein said base has a transverse load at rupture of about 12 lbs
15. Process for the manufacture of an acoustical support panel which comprises providing a membrane of resilient material, providing a base of compression resistant cellulose fibers, and laminating said membrane on said base under conditions to constitute said panel.
16. An acoustical system for mounting a wood flooring over a structure consisting of joist means, board means over said joist means, a layer of concrete over said board means, an acoustical support panel according to claim 1 over said concrete, wooden joists over said support panel, and said wood flooring mounted over said wooden joists.
17. An acoustical system for mounting a wood flooring over a concrete base, which comprises an acoustical support panel according to claim 1 mounted with the membrane of resilient material at the bottom, wooden laths spacedly distributed in parallel fashion over said support panel, longitudinal members made of same material as said acoustical support panel and aligned over said support panel between said laths, and adapted to receive said wood flooring.
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US20060016635A1 (en) * 2002-10-01 2006-01-26 Downey Paul C Noise and vibration mitigating mat
US20060057345A1 (en) * 2004-09-10 2006-03-16 Quiet Solution, Inc. Acoustical sound proofing material and methods for manufacturing same
US20060179760A1 (en) * 2005-02-17 2006-08-17 Burg John P Acoustic wall using compressed fiber panels
US20070094950A1 (en) * 2003-09-08 2007-05-03 Surace Kevin J Acoustical sound proofing material and methods for manufacturing same
US20070175173A1 (en) * 2005-12-30 2007-08-02 Babineau Francis J Jr Board construction assembly for reducing sound transmission and method
US20070278035A1 (en) * 2006-06-01 2007-12-06 General Electric Company Thermal-acoustic enclosure
US20080163586A1 (en) * 2007-01-05 2008-07-10 Michel Goulet Composite insulated building panel
US20080264721A1 (en) * 2007-04-24 2008-10-30 Tinianov Brandon D Acoustical sound proofing material with improved fire resistance and methods for manufacturing same
US20090072457A1 (en) * 2005-05-02 2009-03-19 Downey Paul C Vibration damper
US20100224442A1 (en) * 2009-03-09 2010-09-09 Mark Sanders Sound barrier panel
US20100230206A1 (en) * 2007-04-24 2010-09-16 Serious Materials, Inc. Acoustical sound proofing material with improved damping at select frequencies and methods for manufacturing same
US20110061324A1 (en) * 2007-04-12 2011-03-17 Tinianov Brandon D Sound Proofing Material With Improved Damping And Structural Integrity
US20120125712A1 (en) * 2009-02-09 2012-05-24 Sylvain Roy Support Membrane for Floors, Ceilings or Residential Walls
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US20170221468A1 (en) * 2016-02-02 2017-08-03 Nut Shell LLC Systems and methods for constructing noise reducing surfaces
US9914011B2 (en) 2015-06-25 2018-03-13 Pliteq Inc. Impact damping mat, equipment accessory and flooring system
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US20190112807A1 (en) * 2017-10-17 2019-04-18 Alexandre C. DUCHARME Vibration absorption device and method for acoustic insulation
US20200130713A1 (en) * 2018-10-31 2020-04-30 Bombardier Transportation Gmbh Railcar Body Made of Mating Panels Having a Predetermined Gap There in Between
US10676920B2 (en) 2015-06-25 2020-06-09 Pliteq Inc Impact damping mat, equipment accessory and flooring system
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US20060016635A1 (en) * 2002-10-01 2006-01-26 Downey Paul C Noise and vibration mitigating mat
US8556029B2 (en) 2002-10-01 2013-10-15 Paul C. Downey Noise and vibration mitigating mat
US20070094950A1 (en) * 2003-09-08 2007-05-03 Surace Kevin J Acoustical sound proofing material and methods for manufacturing same
US8181417B2 (en) 2003-09-08 2012-05-22 Serious Energy, Inc. Acoustical sound proofing material and methods for manufacturing same
US8495851B2 (en) 2004-09-10 2013-07-30 Serious Energy, Inc. Acoustical sound proofing material and methods for manufacturing same
US20060057345A1 (en) * 2004-09-10 2006-03-16 Quiet Solution, Inc. Acoustical sound proofing material and methods for manufacturing same
US20060179760A1 (en) * 2005-02-17 2006-08-17 Burg John P Acoustic wall using compressed fiber panels
US20090072457A1 (en) * 2005-05-02 2009-03-19 Downey Paul C Vibration damper
US8113495B2 (en) 2005-05-02 2012-02-14 Downey Paul C Vibration damper
US20070175173A1 (en) * 2005-12-30 2007-08-02 Babineau Francis J Jr Board construction assembly for reducing sound transmission and method
US7604095B2 (en) * 2006-06-01 2009-10-20 General Electric Company Thermal-acoustic enclosure
US20070278035A1 (en) * 2006-06-01 2007-12-06 General Electric Company Thermal-acoustic enclosure
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