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US20060124388A1 - Double wall acoustic panel - Google Patents

Double wall acoustic panel Download PDF

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Publication number
US20060124388A1
US20060124388A1 US10/537,036 US53703605A US2006124388A1 US 20060124388 A1 US20060124388 A1 US 20060124388A1 US 53703605 A US53703605 A US 53703605A US 2006124388 A1 US2006124388 A1 US 2006124388A1
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US
United States
Prior art keywords
acoustic panel
backing plate
panel according
sound absorber
absorber
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.)
Abandoned
Application number
US10/537,036
Inventor
Michel Pompei
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.)
Hutchinson SA
Original Assignee
Hutchinson SA
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
Application filed by Hutchinson SA filed Critical Hutchinson SA
Assigned to HUTCHINSON reassignment HUTCHINSON ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: POMPEI, MICHEL
Publication of US20060124388A1 publication Critical patent/US20060124388A1/en
Abandoned legal-status Critical Current

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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
    • E04B1/88—Insulating elements for both heat and sound
    • E04B1/90—Insulating elements for both heat and sound 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

Definitions

  • the present invention relates to a double-walled acoustic panel having a sound absorber disposed between the walls.
  • absorption efficiency can be improved by creating an air gap between the sound absorber and the wall that receives the sound excitation.
  • the present invention relates to an acoustic panel of the above-specified type of structure that makes that it possible advantageously to create such an air gap.
  • the invention thus provides an acoustic panel comprising first and second walls between which a sound absorber is disposed, wherein the first wall presents on an inside face facing towards the sound absorber, a plate of viscoelastic material, and also a backing plate carrying spacer elements (e.g. parallel strips, honeycomb, embossing, and/or studs) that are distributed in at least one dimension and that create an air gap between the absorber and the backing plate.
  • spacer elements e.g. parallel strips, honeycomb, embossing, and/or studs
  • the spacer element may form a two-dimensional array, e.g. in the form of a grid or a honeycomb or embossing, or indeed in the form of studs distributed in said two dimensions.
  • the grid, the honeycomb, or the embossing may constitute a net or bag having the sound absorber placed therein.
  • the net or bag may be made of a thermally conductive material so as to constitute a heat sink between said walls.
  • a self-adhesive film carrying said array may be stuck onto the sound absorber, in particular onto packaging of the sound absorber, or onto the backing plate.
  • the backing plate is stiffened by embossing, by optionally parallel ribs, by a honeycomb, by studs, or by bosses.
  • FIG. 1 is an exploded view of an embodiment of the invention.
  • FIGS. 2 to 6 show variants of the invention.
  • the acoustic panel presents a first plate 1 which receives sound excitation (arrow F) when the panel is in place, a second wall 2 , and a sound absorber 3 , e.g. glass wool which may be contained in a fine case 4 made of “Mylar” (trademark filed in the name of DuPont).
  • a sound absorber 3 e.g. glass wool which may be contained in a fine case 4 made of “Mylar” (trademark filed in the name of DuPont).
  • the plate 1 presents on its inside face a plate 17 made of a viscoelastic material (e.g. the material named “Deltane” from the supplier Paulstra).
  • a viscoelastic material e.g. the material named “Deltane” from the supplier Paulstra.
  • An air gap is provided by using a mechanical spacer constituted by a grid or by embossing 5 which may be secured to a rigid backing plate 10 , or indeed by a embossed backing plate.
  • the mesh shape may be arbitrary, however its size must be such that under the action of the pressure to which the absorber is subjected, the absorber does not move beyond the area defined by the mesh, i.e. it does not come into contact with the backing plate 10 , and the air gap maintains the desired thickness.
  • the nature of the material constituting the grid is selected as a function of environmental constraints for the intended application.
  • the material may be malleable so as to allow the grid to be fitted to shapes that are complicated, providing that during deformation and under the pressures involved during assembly or use the absorber 3 cannot come into contact with the backing plate 10 .
  • the grid 5 as defined may be stuck onto the inside face of the backing plate 10 , taking care to ensure that the adhesive does not fill the mesh of the grid so as to avoid any contact with the sound absorber.
  • the absorber 3 is of low-density glass wool contained in a fine “Mylar” (registered trademark) case.
  • the spacer may be a grid of stainless steel wire having a diameter of 0.5 millimeters (mm) with a square mesh having a side of 10 mm.
  • the reduction in transparency is of the order of 3 decibels (dB) to 4 dB.
  • the grid 5 e.g. a square grid ( FIG. 2 )
  • the grid 5 may be replaced by a honeycomb 6 ( FIG. 3 ) of suitable size. Too small a mesh would lead to a large connection area between the backing plate 10 and the absorber 3 , thereby reducing performance.
  • the grid could be replaced by studs 8 ( FIG. 4 ) regularly distributed over the inside surface 11 of the backing plate 10 .
  • This can be done by using a self-adhesive film 9 carrying the studs 8 and stuck to the surface 11 .
  • the film 9 may equally well be stuck to the absorber 3 or to its packaging 4 , as is applicable to certain kinds of glass wool.
  • the grid 5 may constitute a net 7 in which the absorber 3 is placed.
  • the plate 1 presents on its inside face a plate 17 of viscoelastic material (e.g. the material “Deltane” from the supplier Paulstra), and a backing plate 10 which is embossed so as to stiffen it and which serves to damp the vibration of the plate 1 that is subjected to the excitation.
  • a plate 17 of viscoelastic material e.g. the material “Deltane” from the supplier Paulstra
  • a backing plate 10 which is embossed so as to stiffen it and which serves to damp the vibration of the plate 1 that is subjected to the excitation.
  • This configuration enables the backing plate 10 to be lighter in weight (and possibly also the plate 17 ) by reducing its thickness while maintaining its stiffness by means of walls 18 extending perpendicularly to its surface. These walls act as a spacer to prevent the absorber coming into contact with the backing plate ( FIG. 9 ).
  • the backing plate 10 may be constituted by an adhesive plate 10 carrying strips 18 in one or two dimensions.
  • the spacers 18 are ribs of the backing plate 10 arranged in a single dimension and spaced apart from one another, generally at a constant pitch.
  • the ribs 18 distributed in one or two dimensions on the backing plate 10 are wide enough to allow the plate 17 of viscoelastic material to occupy the hollow portion 19 thereof (see in particular the detail of FIG. 7 ).
  • a wall 1 of 1.2 mm thick aluminum was damped firstly by a sheet 17 of 1 mm thick viscoelastic material and secondly by a plane 0.5 mm thick backing plate 10 of aluminum.
  • a wall 1 of 1.2 mm thick aluminum was damped firstly by a 0.5 mm sheet 17 of viscoelastic material and secondly by a 0.3 mm thick backing plate 10 of aluminum embossed with a square mesh having a side of 10 mm and a rib height of 2 mm (cf. FIG. 6 ).
  • FIG. 8 shows vertical acceleration level in meters per second per second (m/s 2 ) as a function of frequency F (in the range 0 to 3000 hertz (Hz)), for the following circumstances:
  • curve II said plate 1 damped by a 1 mm thick sheet 17 of viscoelastic material (“Deltane”) and a 0.5 mm thick backing plate 10 of aluminum; and
  • curve III said plate 1 damped by a 0.5 mm thick sheet 17 of viscoelastic material (“Deltane”) covered in its center by a 0.3 mm thick backing plate 10 of aluminum (150 mm ⁇ 15 mm) embossed with a square mesh having a side of 10 mm and a rib height of 2 mm.
  • Deltane viscoelastic material

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  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Electromagnetism (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Building Environments (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)
  • Vibration Prevention Devices (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)

Abstract

The invention relates to an acoustic panel comprising first and second walls having a sound absorber disposed therebetween, wherein the first wall presents, on an inside face facing towards the sound absorber, a plate of viscoelastic material and a backing plate, spacer elements being distributed in at least one dimension and creating an air gap between the absorber and the backing plate.

Description

  • The present invention relates to a double-walled acoustic panel having a sound absorber disposed between the walls.
    • BACKGROUND OF THE INVENTION
  • In such a panel, absorption efficiency can be improved by creating an air gap between the sound absorber and the wall that receives the sound excitation.
    • OBJECTS AND SUMMARY OF THE INVENTION
  • The present invention relates to an acoustic panel of the above-specified type of structure that makes that it possible advantageously to create such an air gap.
  • The invention thus provides an acoustic panel comprising first and second walls between which a sound absorber is disposed, wherein the first wall presents on an inside face facing towards the sound absorber, a plate of viscoelastic material, and also a backing plate carrying spacer elements (e.g. parallel strips, honeycomb, embossing, and/or studs) that are distributed in at least one dimension and that create an air gap between the absorber and the backing plate.
  • More particularly, the spacer element may form a two-dimensional array, e.g. in the form of a grid or a honeycomb or embossing, or indeed in the form of studs distributed in said two dimensions.
  • The grid, the honeycomb, or the embossing may constitute a net or bag having the sound absorber placed therein. In particular, the net or bag may be made of a thermally conductive material so as to constitute a heat sink between said walls.
  • A self-adhesive film carrying said array (e.g. grid, honeycomb, embossing, and/or studs) may be stuck onto the sound absorber, in particular onto packaging of the sound absorber, or onto the backing plate.
  • In a preferred variant, the backing plate is stiffened by embossing, by optionally parallel ribs, by a honeycomb, by studs, or by bosses.
    • BRIEF DESCRIPTION OF THE DRAWINGS
  • Other characteristics and advantages of the invention appear better on reading the following description given by way of non-limiting example and with reference to the accompanying drawings, in which:
  • FIG. 1 is an exploded view of an embodiment of the invention; and
  • FIGS. 2 to 6 show variants of the invention.
    • MORE DETAILED DESCRIPTION
  • In FIG. 1, the acoustic panel presents a first plate 1 which receives sound excitation (arrow F) when the panel is in place, a second wall 2, and a sound absorber 3, e.g. glass wool which may be contained in a fine case 4 made of “Mylar” (trademark filed in the name of DuPont).
  • The plate 1 presents on its inside face a plate 17 made of a viscoelastic material (e.g. the material named “Deltane” from the supplier Paulstra).
  • An air gap is provided by using a mechanical spacer constituted by a grid or by embossing 5 which may be secured to a rigid backing plate 10, or indeed by a embossed backing plate.
  • The mesh shape may be arbitrary, however its size must be such that under the action of the pressure to which the absorber is subjected, the absorber does not move beyond the area defined by the mesh, i.e. it does not come into contact with the backing plate 10, and the air gap maintains the desired thickness.
  • The nature of the material constituting the grid is selected as a function of environmental constraints for the intended application. The material may be malleable so as to allow the grid to be fitted to shapes that are complicated, providing that during deformation and under the pressures involved during assembly or use the absorber 3 cannot come into contact with the backing plate 10.
  • The grid 5 as defined may be stuck onto the inside face of the backing plate 10, taking care to ensure that the adhesive does not fill the mesh of the grid so as to avoid any contact with the sound absorber.
  • The absorber 3 is of low-density glass wool contained in a fine “Mylar” (registered trademark) case. The spacer may be a grid of stainless steel wire having a diameter of 0.5 millimeters (mm) with a square mesh having a side of 10 mm. The reduction in transparency is of the order of 3 decibels (dB) to 4 dB.
  • The grid 5, e.g. a square grid (FIG. 2), may be replaced by a honeycomb 6 (FIG. 3) of suitable size. Too small a mesh would lead to a large connection area between the backing plate 10 and the absorber 3, thereby reducing performance.
  • The grid could be replaced by studs 8 (FIG. 4) regularly distributed over the inside surface 11 of the backing plate 10. This can be done by using a self-adhesive film 9 carrying the studs 8 and stuck to the surface 11. Alternatively, the film 9 may equally well be stuck to the absorber 3 or to its packaging 4, as is applicable to certain kinds of glass wool.
  • Nevertheless, care should be taken to ensure that the absorber is not flattened since that would facilitate contact between the absorber and the backing plate 10 and thus would contribute to undesired coupling with the wall 1 that receives the excitation.
  • The grid 5 may constitute a net 7 in which the absorber 3 is placed.
  • In a variant implementation of the invention, the plate 1 presents on its inside face a plate 17 of viscoelastic material (e.g. the material “Deltane” from the supplier Paulstra), and a backing plate 10 which is embossed so as to stiffen it and which serves to damp the vibration of the plate 1 that is subjected to the excitation. This configuration enables the backing plate 10 to be lighter in weight (and possibly also the plate 17) by reducing its thickness while maintaining its stiffness by means of walls 18 extending perpendicularly to its surface. These walls act as a spacer to prevent the absorber coming into contact with the backing plate (FIG. 9).
  • In the embodiments of FIGS. 5 to 7, the backing plate 10 may be constituted by an adhesive plate 10 carrying strips 18 in one or two dimensions.
  • In FIG. 6, the spacers 18 are ribs of the backing plate 10 arranged in a single dimension and spaced apart from one another, generally at a constant pitch.
  • In FIG. 7, the ribs 18 (distributed in one or two dimensions) on the backing plate 10 are wide enough to allow the plate 17 of viscoelastic material to occupy the hollow portion 19 thereof (see in particular the detail of FIG. 7).
    • EXAMPLE 1
  • A wall 1 of 1.2 mm thick aluminum was damped firstly by a sheet 17 of 1 mm thick viscoelastic material and secondly by a plane 0.5 mm thick backing plate 10 of aluminum.
    • EXAMPLE 2
  • A wall 1 of 1.2 mm thick aluminum was damped firstly by a 0.5 mm sheet 17 of viscoelastic material and secondly by a 0.3 mm thick backing plate 10 of aluminum embossed with a square mesh having a side of 10 mm and a rib height of 2 mm (cf. FIG. 6).
  • For excitation of 0.1 g applied to a 1.2 mm thick plate 1 of aluminum having dimensions of 210 mm×230 mm, FIG. 8 shows vertical acceleration level in meters per second per second (m/s2) as a function of frequency F (in the range 0 to 3000 hertz (Hz)), for the following circumstances:
  • curve I: said plate 1 alone;
  • curve II: said plate 1 damped by a 1 mm thick sheet 17 of viscoelastic material (“Deltane”) and a 0.5 mm thick backing plate 10 of aluminum; and
  • curve III: said plate 1 damped by a 0.5 mm thick sheet 17 of viscoelastic material (“Deltane”) covered in its center by a 0.3 mm thick backing plate 10 of aluminum (150 mm×15 mm) embossed with a square mesh having a side of 10 mm and a rib height of 2 mm.
  • It can be seen that the vibration peaks (curve I) are well damped in both circumstances (curves II and III). For comparable or better performance, stiffening the backing plate 10 makes it possible to reduce the thickness both of the viscoelastic sheet 17 and of the backing plate 10, thereby achieving a significant saving in weight.

Claims (8)

1. An acoustic panel comprising first and second walls between which a sound absorber is disposed, wherein the first wall presents on an inside face facing towards the sound absorber, a plate of viscoelastic material, and also a backing plate carrying spacer elements that are distributed in at least one dimension and that create an air gap between the absorber and the backing plate.
2. An acoustic panel according to claim 1, wherein the spacer elements form a two-dimensional array.
3. An acoustic panel according to claim 1, wherein said array comprises a grid, a honeycomb, or embossing.
4. An acoustic panel according to claim 3, wherein the grid, the honeycomb, or the embossing constitutes a net with the sound absorber being placed inside the net.
5. An acoustic panel according to claim 2, wherein the array comprises studs distributed in said two dimensions.
6. An acoustic panel according to claim 2, including a self-adhesive film carrying said array, said film being stuck onto the sound absorber, in particular onto packaging of the sound absorber.
7. An acoustic panel according to claim 1, wherein said spacer elements are reinforcing elements secured to the backing plate.
8. An acoustic panel according to claim 7, wherein said reinforcing elements are embossing, in the form of optionally parallel ribs, a honeycomb, studs, or bosses.
US10/537,036 2002-12-02 2003-11-27 Double wall acoustic panel Abandoned US20060124388A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR0215119 2002-12-02
FR0215119A FR2847919B1 (en) 2002-12-02 2002-12-02 DOUBLE-WALL ACOUSTIC PANEL
PCT/FR2003/003513 WO2004053246A1 (en) 2002-12-02 2003-11-27 Double-wall acoustic panel

Publications (1)

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US20060124388A1 true US20060124388A1 (en) 2006-06-15

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US10/537,036 Abandoned US20060124388A1 (en) 2002-12-02 2003-11-27 Double wall acoustic panel

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US (1) US20060124388A1 (en)
EP (1) EP1570139B1 (en)
AT (1) ATE348226T1 (en)
DE (1) DE60310451T2 (en)
ES (1) ES2279214T3 (en)
FR (1) FR2847919B1 (en)
WO (1) WO2004053246A1 (en)

Cited By (19)

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US20060057345A1 (en) * 2004-09-10 2006-03-16 Quiet Solution, Inc. Acoustical sound proofing material and methods for manufacturing same
US20070034445A1 (en) * 2005-08-02 2007-02-15 Michel Pompei Acoustic panel of the air sheet type
US20070278035A1 (en) * 2006-06-01 2007-12-06 General Electric Company Thermal-acoustic enclosure
US20080264721A1 (en) * 2007-04-24 2008-10-30 Tinianov Brandon D Acoustical sound proofing material with improved fire resistance and methods for manufacturing same
US20080302599A1 (en) * 2006-01-19 2008-12-11 Se Electronics International, Inc. Apparatus for Absorbing Acoustical Energy and Use Thereof
US7503428B1 (en) * 2002-06-12 2009-03-17 L.J. Avalon, L.L.C. Acoustic panel
US20090307996A1 (en) * 2005-10-28 2009-12-17 Johann Berger Building Board or the Like, Its Manufacture and Use
US20090321178A1 (en) * 2008-06-30 2009-12-31 Durchholz Anthony J Method and system for damped acoustic panels
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
US20110067949A1 (en) * 2009-09-18 2011-03-24 Tadashi Mori Soundproof Cover and Method for Producing the Same
US20110266088A1 (en) * 2009-01-14 2011-11-03 Kuraray Kuraflex Co., Ltd. Soundproof panel and soundproof structure
US8074766B1 (en) * 2009-09-08 2011-12-13 Creative Composites, Ltd Multi-layer sound attenuating acoustic panel
US20140339014A1 (en) * 2013-05-17 2014-11-20 Purdue Research Foundation Sound barrier systems
US10300964B2 (en) * 2017-06-19 2019-05-28 Ford Motor Company Vehicle tailgate
US10580396B1 (en) 2017-04-07 2020-03-03 The United States Of America As Represented By The Secretary Of The Navy Acoustically stiff wall
US11753818B1 (en) * 2019-08-07 2023-09-12 Kelly B. McKenna Acoustic material frame and method
US20230417054A1 (en) * 2020-11-18 2023-12-28 Saint-Gobain Ecophon Ab An acoustic panel, a suspended acoustic system using such acoustic panel, and a baseboard
US12529223B2 (en) 2019-08-07 2026-01-20 Kelly B. McKenna Acoustic material frame and method

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DE102017124754A1 (en) * 2017-10-23 2019-04-25 Carcoustics Techconsult Gmbh Insulating element for acoustic shielding of a component with improved heat transfer and arrangement of a plurality of such insulating elements

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Cited By (30)

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US7503428B1 (en) * 2002-06-12 2009-03-17 L.J. Avalon, L.L.C. Acoustic panel
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
US20070034445A1 (en) * 2005-08-02 2007-02-15 Michel Pompei Acoustic panel of the air sheet type
US20090307996A1 (en) * 2005-10-28 2009-12-17 Johann Berger Building Board or the Like, Its Manufacture and Use
US20080302599A1 (en) * 2006-01-19 2008-12-11 Se Electronics International, Inc. Apparatus for Absorbing Acoustical Energy and Use Thereof
US8191678B2 (en) * 2006-01-19 2012-06-05 Se Electronics International, Inc. Apparatus for absorbing acoustical energy and use thereof
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
US8424251B2 (en) 2007-04-12 2013-04-23 Serious Energy, Inc. Sound Proofing material with improved damping and structural integrity
US20110061324A1 (en) * 2007-04-12 2011-03-17 Tinianov Brandon D Sound Proofing Material With Improved Damping And Structural Integrity
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
US8181738B2 (en) * 2007-04-24 2012-05-22 Serious Energy, Inc. Acoustical sound proofing material with improved damping at select frequencies and methods for manufacturing same
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ES2279214T3 (en) 2007-08-16
FR2847919A1 (en) 2004-06-04
FR2847919B1 (en) 2005-11-11
DE60310451T2 (en) 2007-10-11
ATE348226T1 (en) 2007-01-15
DE60310451D1 (en) 2007-01-25
WO2004053246A1 (en) 2004-06-24
EP1570139B1 (en) 2006-12-13
EP1570139A1 (en) 2005-09-07

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