US3087567A - High acoustic-energy transmission-loss panel and the like - Google Patents

High acoustic-energy transmission-loss panel and the like Download PDF

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Publication number
US3087567A
US3087567A US797741A US79774159A US3087567A US 3087567 A US3087567 A US 3087567A US 797741 A US797741 A US 797741A US 79774159 A US79774159 A US 79774159A US 3087567 A US3087567 A US 3087567A
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US
United States
Prior art keywords
panel
masses
acoustic
mass
transmission loss
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
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US797741A
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English (en)
Inventor
Kurtze Guenther
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.)
RTX BBN Technologies Corp
Original Assignee
Bolt Beranek and Newman Inc
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Filing date
Publication date
Application filed by Bolt Beranek and Newman Inc filed Critical Bolt Beranek and Newman Inc
Priority to US797741A priority Critical patent/US3087567A/en
Priority to DEB56144A priority patent/DE1253434B/de
Priority to FR818628A priority patent/FR1248397A/fr
Priority to BE587819A priority patent/BE587819A/fr
Priority to CH191760A priority patent/CH369912A/fr
Application granted granted Critical
Publication of US3087567A publication Critical patent/US3087567A/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • E04B1/8409—Sound-absorbing elements sheet-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
    • E04B1/86—Sound-absorbing elements slab-shaped
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/172—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using resonance effects
    • 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
    • E04B2001/742—Use of special materials; Materials having special structures or shape
    • E04B2001/747—Corrugated materials
    • 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
    • E04B2001/742—Use of special materials; Materials having special structures or shape
    • E04B2001/748—Honeycomb materials
    • 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
    • E04B2001/8414—Sound-absorbing elements with non-planar face, e.g. curved, egg-crate shaped
    • 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
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/1234—Honeycomb, or with grain orientation or elongated elements in defined angular relationship in respective components [e.g., parallel, inter- secting, etc.]
    • 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
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12389—All metal or with adjacent metals having variation in thickness
    • Y10T428/12396—Discontinuous surface component
    • 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
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
    • Y10T428/12986—Adjacent functionally defined components

Definitions

  • the present invention relates to wall structures, partitions, surfaces, compartments and the like, all hereinafter referred to by the generic phrase panel and the like, and, more particularly, to such structures designed to provide high acoustic-energy transmission loss.
  • An object of the present invention indeed, is to provide a novel construction for a panel and the like that will provide for an acoustic-energy transmission loss over a broad band of the lower and intermediate acoustic frequencies that is greater than that attainable by mass law considerations.
  • a further object is to provide a new and improved panel structure of more general utility.
  • FIG. 1 of which is a fragmentary perspective view illustrating a panel and the like constructed in accordance with the present invention
  • FIG. 2 is a similar view of a preferred embodiment
  • FIGS. 3a, 3b and 3e are side elevations of further modifications
  • FIGS. 4, 5 and 6 are similar views of additional moditied panel constructions, with FIG. 6 partially sectionalized;
  • FIG. 7 is a fragmentary perspective of still a further modified construction, drawn upon an enlarged scale, and partly sectionalized to illustrate details of construction.
  • FIG. 8 is a graph comparing the performance of an embodiment of the present invention with the optimum theoretical transmission loss to be expected from mass law considerations.
  • panel structures are provided the mass of which is not uniformly distributed over all of the panel area, but, rather, is concentrated at points, spaced from one another in a Welldefined way, and separated by relatively light, but nonporous, sheet or panel material therebetween.
  • a thin panel of sheet material such as metal foil and the like, is shown at 1 in FIG. I, loaded with regularly distributed elemental mass portions 3, such as lead weights or the like, with the thin panel elemental portions 1' therebetween. If a panel 1 of this kind is exposed to an incident acoustic wave in the air or other medium surrounding the panel and the like, the wavelength of which wave is large compared with the distance d between the successive elemental mass portions 3, the response of the different elemental surface portions 1, 3
  • the unloaded intermediate elemental portions 1' of the panel 1 act as springs or stifiness-type impedance elements (corresponding in electrical analog to capacity), while the elemental portions 3 act as mass-type impedance elements (corresponding to electrical inductance). If there is no dissipation, the motions of the mass and spring elemental portions are directed opposite to one other.
  • the resonant frequency determined by the magnitudes of the elemental portions 1, 3, as Well as by their surface areas the amplitudes of motion of both types of elemental portions 1 and 3 will be such that the integral motion is zero; i.e. at this frequency, the acoustic transmission loss of the assumed non-dissipative panel ll will be infinite.
  • the performance of the structure of FIG. 1 may perhaps be more readily understood by considering the electrical analogs.
  • the stiffness of a normal isotropic panel will be represented by capacity connected in series with inductance. This yields zero impedance at resonance, corresponding to zero acoustic transmission loss at coincidence.
  • the transmission loss indicated along the ordinate, approaches the mass-law dash-line curve, but never can exceed it, the capacity being proportional to 1/1 in this case.
  • the coupling between elemental portions is such that the capacity 1' is connected in parallel with the inductance 3, so that infinite impedance is attained at the resonance frequency and hence infinite transmission loss.
  • the resonant frequency at which infinite transmission loss is obtained will be the lower, the larger the point masses 3 and their spacing a, and the smaller the stiffness of the supporting plate portions 1. In physically simple cases, this resonant frequency can be calculated, but in general it will be easier to determine the parameters of the panel experimentally in order to obtain the desired resonant frequency.
  • the panel structure of FIG. 1 has a regular or uniform distribution of the masses 3, and hence, a welldefined resonant frequency.
  • the panel 1 will be restricted in application, thus, to cases where high transmission loss is wanted at a single frequency; that is, so as to provide shielding against a pure tone of high intensity, as an illustration.
  • the panel 1 may also be used as an acoustic filter.
  • FIGS. 3a and 3c employing respective masses 3 and 3 on one side of the panel, and FIG. 3b, masses 3 on both sides.
  • the stiffness of the panel portions 1 will be essentially determined by its bending stiffness. This, of course, is not the only possibility, since the elemental portions 1' of the panel in between the masses 3 can as well act as membranes and still provide the desired performance of a stiffness-controlled elemental portion of the panel surface. There is, thus, a large number of possible variations in the design of panels in accordance with the invention, ranging from a curtain-type partition comprising a plastic layer or the like loaded with masses such as glass spheres or beads, as later discussed, to a mass-loaded solid sheet of gypsum or even concrete or the like. In FIG.
  • elements 3 of high density such as substantially hemispherical beads, are distributed over a panel surface 1 of relatively low density, as of thin plastic material and the like.
  • the high density elements 3" are covered and thus concealed in the panel of FIG. 5, however, by a further sheet 4.
  • the mass elements 3" are interposed within apertures 3 in a flexible plastic or other sheet 1.
  • the mass regions 3, moreover, may either be integrally or otherwise formed of the same material as the panel 1, as by providing thicker elemental portions on 3", FIGS. 3a, b and c, or they may be of different material, as before discussed in connection with, for example, FIGS. 1 and 2, attached to and protruding from the panel surface.
  • a honeycomb spacer structure 6 is shown supporting inner and outer homogeneous panel surfaces or skins 1 and 10 in sandwich construction, with the mass elemental portions provided by filling predetermined cells with high-density metal or other material, as at 6.
  • the common characteristic of the panels of the present invention resides in the non-uniform distribution of the mass and/ or stiffness of the elemental portions thereof, whereby the average or mean distance between the successive alternate mass-controlled elemental portions 3 and between the successive stiffness-controlled intermediate elemental portions 1 is small compared with the wavelengths of the acoustic energy in the air or other surrounding medium within the frequency range in which high transmission loss is desired.
  • the magnitudes of the masses and stiffness are matched to each other so that the resulting resonant frequency is within the desired frequency range.
  • sheet-metal-like is intended to embrace materials which are like sheet metal in the function performed by the designated element in the acoustic panel; for example, material such as aluminum foil or thin plastic sheet are sheet-metal-like when they serve as the panel member of the invention. Similarly, such materials are metal-like when they serve as the masses of the invention.
  • An acoustic panel for providing over a broad band of low acoustic frequencies, an acoustic-wave transmission loss greater than that obtainable by mass-law considerations, comprising a thin panel member of sheet-metal-like resilient material supporting a plurality of metal-like masses spaced along the length and width of the panel member and coupled mechanically to each other directly through freely vibratory resilient sheet-metal-like material portions of the panel member disposed between successive masses, the distance between the said masses being less than the wave lengths corresponding to the said frequencies and the weight of the said masses being substantially greater than that of the said resilient material portions, the weight of the masses and the degree of resilience of the said resilient portions being correlated to produce a mechanical resonance at an acoustic frequency within the said band.
  • An acoustic panel as claimed in claim 1 and in which the panel member comprises a pair of spaced homogeneous outer layers and the masses comprise spacer elements of different density sandwiched between the layers.

Landscapes

  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Electromagnetism (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Multimedia (AREA)
  • Building Environments (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)
US797741A 1959-03-06 1959-03-06 High acoustic-energy transmission-loss panel and the like Expired - Lifetime US3087567A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
US797741A US3087567A (en) 1959-03-06 1959-03-06 High acoustic-energy transmission-loss panel and the like
DEB56144A DE1253434B (de) 1959-03-06 1960-01-07 Schalldaemmendes, flaechiges, insbesondere plattenfoermiges Bauteil
FR818628A FR1248397A (fr) 1959-03-06 1960-02-16 Paroi à perte élevée de transmission d'énergie acoustique
BE587819A BE587819A (fr) 1959-03-06 1960-02-19 Paroi à perte élevée de transmission d'énergie acoustique.
CH191760A CH369912A (fr) 1959-03-06 1960-02-19 Installation comprenant un panneau produisant un affaiblissement élevé de transmission d'énergie acoustique

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US797741A US3087567A (en) 1959-03-06 1959-03-06 High acoustic-energy transmission-loss panel and the like

Publications (1)

Publication Number Publication Date
US3087567A true US3087567A (en) 1963-04-30

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Family Applications (1)

Application Number Title Priority Date Filing Date
US797741A Expired - Lifetime US3087567A (en) 1959-03-06 1959-03-06 High acoustic-energy transmission-loss panel and the like

Country Status (5)

Country Link
US (1) US3087567A (fr)
BE (1) BE587819A (fr)
CH (1) CH369912A (fr)
DE (1) DE1253434B (fr)
FR (1) FR1248397A (fr)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4083159A (en) * 1973-10-29 1978-04-11 Hitco Structural sound absorbing panel for underwater use and methods of making same
US4195713A (en) * 1974-05-29 1980-04-01 Reduc Acoustics Ab Sandwich structures with partial damping layers
US4244439A (en) * 1977-11-10 1981-01-13 Elektronikcentralen Sound-absorbing structure
EP0637654A1 (fr) * 1993-08-06 1995-02-08 Societe Des Lieges Hpk Panneau de liège aggloméré, en particulier pour isolation phonique et plaque de liège pour la formation de ce panneau
US20060231331A1 (en) * 2005-04-14 2006-10-19 Rpg Diffusor Systems, Inc. Extended bandwidth folded well diffusor
EP1571649A3 (fr) * 2004-03-05 2007-05-23 RSM Technologies Limited Structure atténuant le son
EP1930515A1 (fr) * 2006-12-08 2008-06-11 Georg Ignatius Elément de construction pour immeuble, construction d'immeubles et analogues, tout comme procédé de fabrication correspondant
US10519650B2 (en) 2015-02-05 2019-12-31 National Gypsum Properties, Llc Sound damping wallboard and method of forming a sound damping wallboard
US11056092B2 (en) 2017-12-13 2021-07-06 The Boeing Company Anti-resonant panel and methods of making the same
US11315538B2 (en) 2017-12-13 2022-04-26 The Boeing Company Anti-resonant panels
US11559968B2 (en) 2018-12-06 2023-01-24 Gold Bond Building Products, Llc Sound damping gypsum board and method of constructing a sound damping gypsum board
US20230203805A1 (en) * 2021-12-27 2023-06-29 Calum W. Smeaton Apparatus with Interchangeable Panels for Varying Acoustic and Esthetic Treatments or Effects
US11772372B2 (en) 2020-06-05 2023-10-03 Gold Bond Building Products, Llc Sound damping gypsum board and method of constructing a sound damping gypsum board
US20230377546A1 (en) * 2022-05-19 2023-11-23 Toyota Motor Engineering & Manufacturing North America, Inc. Flexural wave absorption system

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3115948A (en) * 1960-12-14 1963-12-31 Koppers Co Inc Panel for the reduction of sound transmission
DE2437947C3 (de) * 1974-08-07 1984-09-20 Fa. Carl Freudenberg, 6940 Weinheim Anordnung zur Absorption von Luftschall
DE3013861C2 (de) * 1980-04-10 1983-04-07 Messerschmitt-Bölkow-Blohm GmbH, 8000 München Dämpfungsbelag
GB2159929B (en) * 1984-06-06 1987-08-19 Ford Motor Co Selector lever gaiter for motor vehicles
US4585685A (en) * 1985-01-14 1986-04-29 Armstrong World Industries, Inc. Acoustically porous building materials
DE102009032497B4 (de) * 2009-07-09 2017-03-09 Airbus Defence and Space GmbH Abstimmung des Schalldämmmaßes durch verteilte Punktmassen
DE102016207411B4 (de) * 2016-04-29 2020-07-30 Airbus Operations Gmbh Isolationsbauteil für ein luft- oder raumfahrzeug
DE102022119407A1 (de) * 2022-08-02 2024-02-08 Bayerische Motoren Werke Aktiengesellschaft Flächenformteil und Kraftfahrzeug mit zumindest einem Flächenformteil

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Publication number Priority date Publication date Assignee Title
US1867549A (en) * 1929-07-19 1932-07-19 Acoustical Correction Corp Sound absorbent material
US1910810A (en) * 1928-10-12 1933-05-23 Johns Manville Acoustical construction for interiors
US2196615A (en) * 1938-02-04 1940-04-09 Goodrich Co B F Sound deadener
US2270902A (en) * 1939-11-25 1942-01-27 George A Rubissow Antivibration means and method of use of same
US2541159A (en) * 1946-01-22 1951-02-13 Paul H Geiger Sound deadener for vibratory bodies
GB723621A (en) * 1950-07-15 1955-02-09 Lockheed Aircraft Corp Improvements in or relating to a light weight laminated building unit
US2860388A (en) * 1953-05-20 1958-11-18 Morgan Company Of Wisconsin Hollow core flush door
US2922483A (en) * 1954-06-03 1960-01-26 Harris Transducer Corp Acoustic or mechanical impedance

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE880798C (de) * 1941-12-19 1953-06-25 Lothar Dr-Ing Cremer Schalldaemmende Trennwand
DE934078C (de) * 1949-11-19 1955-10-13 Inst Tech Physik E V Bauplatte zur schalldaemmenden Verkleidung von Decken oder Waenden
DE910119C (de) * 1951-11-17 1954-04-29 Inst Tech Physik Schalldaemmender Fussboden oder Estrich fuer Massivdecken
DE1039759B (de) * 1952-10-27 1958-09-25 Licentia Gmbh Schalldaempfende Schutzhuelle fuer Maschinen
DE1015209B (de) * 1955-07-28 1957-09-05 Werner Genest Ges Fuer Isolier Schalldaemmende Bauplatte aus biegeweichem Werkstoff und beschwerenden Einzelkoerpern

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1910810A (en) * 1928-10-12 1933-05-23 Johns Manville Acoustical construction for interiors
US1867549A (en) * 1929-07-19 1932-07-19 Acoustical Correction Corp Sound absorbent material
US2196615A (en) * 1938-02-04 1940-04-09 Goodrich Co B F Sound deadener
US2270902A (en) * 1939-11-25 1942-01-27 George A Rubissow Antivibration means and method of use of same
US2541159A (en) * 1946-01-22 1951-02-13 Paul H Geiger Sound deadener for vibratory bodies
GB723621A (en) * 1950-07-15 1955-02-09 Lockheed Aircraft Corp Improvements in or relating to a light weight laminated building unit
US2860388A (en) * 1953-05-20 1958-11-18 Morgan Company Of Wisconsin Hollow core flush door
US2922483A (en) * 1954-06-03 1960-01-26 Harris Transducer Corp Acoustic or mechanical impedance

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4083159A (en) * 1973-10-29 1978-04-11 Hitco Structural sound absorbing panel for underwater use and methods of making same
US4195713A (en) * 1974-05-29 1980-04-01 Reduc Acoustics Ab Sandwich structures with partial damping layers
US4244439A (en) * 1977-11-10 1981-01-13 Elektronikcentralen Sound-absorbing structure
EP0637654A1 (fr) * 1993-08-06 1995-02-08 Societe Des Lieges Hpk Panneau de liège aggloméré, en particulier pour isolation phonique et plaque de liège pour la formation de ce panneau
FR2708644A1 (fr) * 1993-08-06 1995-02-10 Hpk Lieges Panneau de liège aggloméré, en particulier pour isolation phonique et plaque de liège pour la formation de ce panneau.
EP1571649A3 (fr) * 2004-03-05 2007-05-23 RSM Technologies Limited Structure atténuant le son
US20060231331A1 (en) * 2005-04-14 2006-10-19 Rpg Diffusor Systems, Inc. Extended bandwidth folded well diffusor
US7322441B2 (en) * 2005-04-14 2008-01-29 Rpg Diffusor Systems, Inc. Extended bandwidth folded well diffusor
EP1930515A1 (fr) * 2006-12-08 2008-06-11 Georg Ignatius Elément de construction pour immeuble, construction d'immeubles et analogues, tout comme procédé de fabrication correspondant
US11519167B2 (en) 2015-02-05 2022-12-06 Gold Bond Building Products, Llc Sound damping wallboard and method of forming a sound damping wallboard
US10519650B2 (en) 2015-02-05 2019-12-31 National Gypsum Properties, Llc Sound damping wallboard and method of forming a sound damping wallboard
US11939765B2 (en) 2015-02-05 2024-03-26 Gold Bond Building Products, Llc Sound damping wallboard and method of forming a sound damping wallboard
US11056092B2 (en) 2017-12-13 2021-07-06 The Boeing Company Anti-resonant panel and methods of making the same
US11315538B2 (en) 2017-12-13 2022-04-26 The Boeing Company Anti-resonant panels
US11559968B2 (en) 2018-12-06 2023-01-24 Gold Bond Building Products, Llc Sound damping gypsum board and method of constructing a sound damping gypsum board
US11845238B2 (en) 2018-12-06 2023-12-19 Gold Bond Building Products, Llc Sound damping gypsum board and method of constructing a sound damping gypsum board
US12296553B2 (en) 2018-12-06 2025-05-13 Gold Bond Building Products, Llc Sound damping gypsum board and method of constructing a sound damping gypsum board
US11772372B2 (en) 2020-06-05 2023-10-03 Gold Bond Building Products, Llc Sound damping gypsum board and method of constructing a sound damping gypsum board
US12296572B2 (en) 2020-06-05 2025-05-13 Gold Bond Building Products, Llc Sound damping gypsum board and method of constructing a sound damping gypsum board
US20230203805A1 (en) * 2021-12-27 2023-06-29 Calum W. Smeaton Apparatus with Interchangeable Panels for Varying Acoustic and Esthetic Treatments or Effects
US20230377546A1 (en) * 2022-05-19 2023-11-23 Toyota Motor Engineering & Manufacturing North America, Inc. Flexural wave absorption system
US12080264B2 (en) * 2022-05-19 2024-09-03 Toyota Motor Engineering & Manufacturing North America, Inc. Flexural wave absorption system

Also Published As

Publication number Publication date
CH369912A (fr) 1963-06-15
DE1253434B (de) 1967-11-02
FR1248397A (fr) 1960-12-09
BE587819A (fr) 1960-06-16

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