US3351154A - Acoustical panel with cellular lattice embedded into sound absorptive element - Google Patents

Acoustical panel with cellular lattice embedded into sound absorptive element Download PDF

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US3351154A
US3351154A US524069A US52406966A US3351154A US 3351154 A US3351154 A US 3351154A US 524069 A US524069 A US 524069A US 52406966 A US52406966 A US 52406966A US 3351154 A US3351154 A US 3351154A
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sound
lattice
absorptive element
panel
sound absorptive
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US524069A
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Michael J Kodaras
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BALDWIN EHRET HILL Inc
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BALDWIN EHRET HILL Inc
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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
    • E04B9/04—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
    • 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
    • E04B9/0457—Ceilings; Construction of ceilings, e.g. false ceilings; Ceiling construction with regard to insulation comprising slabs, panels, sheets or the like having closed internal cavities
    • 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
    • E04B9/0464—Ceilings; Construction of ceilings, e.g. false ceilings; Ceiling construction with regard to insulation comprising slabs, panels, sheets or the like having irregularities on the faces, e.g. holes, grooves
    • 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
    • E04B9/0478—Ceilings; Construction of ceilings, e.g. false ceilings; Ceiling construction with regard to insulation comprising slabs, panels, sheets or the like of the tray type
    • E04B9/0485—Ceilings; Construction of ceilings, e.g. false ceilings; Ceiling construction with regard to insulation comprising slabs, panels, sheets or the like of the tray type containing a filling element
    • 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
    • E04B2001/8263—Mounting of acoustical elements on supporting structure, e.g. framework or wall surface
    • E04B2001/8281—Flat elements mounted parallel to a supporting surface with an acoustically active air gap between the elements and the mounting surface
    • 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
    • E04B2001/8423—Tray or frame type panels or blocks, with or without acoustical filling
    • E04B2001/8442—Tray type elements
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
    • E04B1/82—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to sound only
    • E04B1/84—Sound-absorbing elements
    • E04B2001/8457—Solid slabs or blocks
    • E04B2001/8461—Solid slabs or blocks layered
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
    • E04B1/82—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to sound only
    • E04B1/84—Sound-absorbing elements
    • E04B2001/8457—Solid slabs or blocks
    • E04B2001/8476—Solid slabs or blocks with acoustical cavities, with or without acoustical filling
    • E04B2001/848—Solid slabs or blocks with acoustical cavities, with or without acoustical filling the cavities opening onto the face of the element
    • E04B2001/8485—Solid slabs or blocks with acoustical cavities, with or without acoustical filling the cavities opening onto the face of the element the opening being restricted, e.g. forming Helmoltz resonators
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24149—Honeycomb-like
    • Y10T428/24165—Hexagonally shaped cavities
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24273—Structurally defined web or sheet [e.g., overall dimension, etc.] including aperture

Definitions

  • This invention relates to the art of acoustical panels, more particularly to an improved acoustical panel in which the sound deadening properties are subject to selective variation by the designer, and in which the exposed surface of the panel may have any of a variety of desired decorative arrangements or coverings formed thereon without interfering with the sound deadening properties of the panel.
  • a variety of different types of acoustical panels have been evolved for use on walls, ceilings, floors, or the like partitioning structures employed to enclose any area in which it would be desirable to deaden or dissipate noise in the enclosed area.
  • the sound absorptive properties of a material are generally dependent on the porosity and internal structure of the material, whereby the sound to be deadened is trapped within the pores of 'the material, and the vibrational energy of the sound dissipated by the flexing of the material.
  • Another object of the invention is to provide an improved acoustical panel With an exposed surface which may be painted or otherwise treated without interfering with the sound deadening properties of the panel.
  • a further object of the invention is to provide an acoustical panel with improved means for trapping sound in proximity to the sound deadening material of the panel.
  • Another object of the invention is to provide an improved sound deadening panel having a relatively strong exposed surface in which the rigidity and strength of the surface does not produce undesired reflection of the sound waves impinging thereon.
  • an improved acoustical tile embodying the instant invention is formed by means of a sound absorptive element such as conventionally available intercellular or fibrous board.
  • a sound absorptive element such as conventionally available intercellular or fibrous board.
  • Cellulose boards, mineral fi ber boards, fiberglass, or rockwool may readily be employed.
  • a cellular lattice Arranged over the surface of the sound absorptive element which is normally intended for positioning in sound receiving position with respect to the area in which sound is to be deadened, is a cellular lattice.
  • This lattice may be fabricated of any one of a large variety of materials such as paper, sheet metal, plastic or the like. Expanded paper board is found particularly suitable.
  • the lattice defines a plurality of cells adjacent 3,351,154 Patented Nov.
  • a perforate covering sheet formed of any one of a large variety of suitable sheet material such as sheet steel, sheet plastic, or. the like is secured over the lattice with the perforations of the covering sheet permitting transmission of sound through said sheet to the cells defined by the lattice.
  • the covering sheet is selected from that class of materials subject to ready cleaning, painting, or the provision of desired decorative motifs thereon.
  • a feature of the invention resides in the sound trapping properties of the lattice which acts to form a resonator trapping the sound in proximity to the sound absorp tive element to insure damping of the sound.
  • FIG. 1 is a schematic cross sectional view through a room or the like area showing the novel acoustical panel employed asia ceiling tile,
  • FIG. 2 is a perspective view with parts 'broken away of an acoustical panel made in accordance with the teachings of this invention and on a larger scale,
  • FIG. 3 is a cross sectional view taken on line 3-3 of FIG. 2 showing the details of the structural components of the panel
  • FIG. 4 is a fragmentary detail sectional view showing an acoustical panel made in accordance with the teachings of this invention in which the edges of the covering panel are turned up to enclose the lattice and sound absorbing board to provide acleanjoint between panels,
  • the density, and thickness of the sound absorptive element is selected, dependent on the sound absorptive qualities desired, and production and handling considerations.
  • the un'dersurface 12 of the board 11 is shown as intended for sound impingement thereon.
  • a lattice 13 the wall of which defines a plurality of cells 14.
  • the lattice 13 may be fabricated in a variety of ways of a large variety of materials. Thus, paper board, sheet plastic, molded plastics, or molded fiber board, or the material employed for the'sound absorptive element itself may be employed in fabricating the lattice.
  • expanded paper board stock arranged in the illustrated honeycomb lattice may be satisfactorily employed.
  • This paper board stock lattice 13 is secured to the sound impinging surface of the sound absorbing board 11 by the use of glue or the like adhesives.
  • Covering plate 15 Arranged over the lattice 13 to sandwich the lattice between itself and the sound absorbing board 11 is a covering plate 15 formed with a plurality of spaced perforations 16.
  • Covering plate 15 is formed of a relatively rigid sheet material such as sheet plastic, or any one of that class of materials having desired structural rigidity. Sheet steel is found particularly suitable.
  • the perforations 16 are spaced so as to insure the free passage. of air through the covering plate 15 to the cells 14 defined by the walls of lattice 13.
  • the materials of which the covering plate are formed are selected from a class of material subject to ready maintenance, ready cleaning and having desired textures suitable for use in the .areas in which the plate is employed.
  • Covering plate 15 is secured to the lattice 'by utilization of conventional fastening techniques. Thus, when expanded paper board is employed for forming the lattice, paper bonding adhesives have been found particularly suitable.
  • the covering plate and lattice may be integrally molded of materials such as metal, plastic or the like within the scope of the invention.
  • the panel board 410 is shown as formed to provide a plurality of discreet panel sections.
  • the panel board 410 is substantially identical to the panel board as illustrated in FIGS. 2 and 3.
  • the configuration of the covering plate is made such as to provide this covering plate 15 with a plurality of upturned peripheral edges 416 which serve to define a discreet panel, and implement the installation of the panels to provide a clean straight joint between abutting panels.
  • the rear surface of the panel 10, on that face of the sound absorptive boar-d 11 observe to the sound impinging undersurface 12 thereof, as illustrated, will be formed with a sound transmission loss coating 50 such as vinyl, enamel, or the like coating materials providing a relatively impervious surface.
  • a sound transmission loss coating 50 such as vinyl, enamel, or the like coating materials providing a relatively impervious surface.
  • the afore-described panel board may be made of any suitable dimensions. Where formed of the conventional rectangular panels, these panels are arranged to cover the area which it is intended to provide with desired sound deadening properties. Thus, as best shown in FIG. 1, the panels '10 are shown as arranged to provide sound deadening ceiling tiles.
  • the ceiling tiles 10 are shown suspended by supporting channels C depending from hangers H in conventional fashion.
  • the sound absorptive materials have their sound deadening properties enhanced by the provision of resonating cells which serve to trap the sound to be deadened in proximity to the sound absorptive surface
  • the exposed covering panel 15 is formed of a material which serves the two-fold function of providing a surface to reflect the sound entrapped within the cells back to the sound deadening surface, and additionally provides a surface of sufiicient rigidity to implement the formation of desired decorative finishes and permits the ready cleaning of the wall or ceiling panel.
  • the size and number of the perforations per cell of lattice and the size and depth of the cells of the lattice may be varied to obtain resonance at any required frequency.
  • the sound absorptive properties of the sound absorptive board may be selected to provide an optimum degree of damping in the specific cell of the lattice.
  • Various different facing perforation patterns and lattice cell size can be used to broaden the frequency range of the resonator should this be desired.
  • the resistance of the perforated metal facing may be increased by the introduction of a thin, porous fabric 51, such as thin gauze or paper between the perforated metal and the lattice cells.
  • An'acoustical panel comprising a sound absorptive element having a surface adapted for arrangement in sound receiving position with respect to any area in which sound is to be deadened, a cellular lattice positioned over the sound receiving surface of said sound absorptive element, said lattice defining a plurality of cells, an edge of said cellular lattice adjacent said sound absorptive element being embedded into said sound asborptive element, and a perforate rigid covering plate arranged over the surface of said lattice opposed to the sound absorptive element and secured to said lattice, the perforation of said covering plate permitting transmission of sound through said plate to the cells defined by said lattice.

Description

CELLULAR LATTICE EMBEDDED D ABSORPTIVE ELEME Filed June 1, 196
Nov. 7, 1951 ACOUSTICAL PA J v INTO SOU Original JIIIIIIITI.
ATTQRNEYS v vided and this 4 Claims. (Cl. 181-33) This invention relates to the art of acoustical panels, more particularly to an improved acoustical panel in which the sound deadening properties are subject to selective variation by the designer, and in which the exposed surface of the panel may have any of a variety of desired decorative arrangements or coverings formed thereon without interfering with the sound deadening properties of the panel.
This application is a division of copending application Ser. No. 371,310, filed June 1, 1964, now abandoned.
As conducive to an understanding of the invention, it is noted that a variety of different types of acoustical panels have been evolved for use on walls, ceilings, floors, or the like partitioning structures employed to enclose any area in which it would be desirable to deaden or dissipate noise in the enclosed area. The sound absorptive properties of a material are generally dependent on the porosity and internal structure of the material, whereby the sound to be deadened is trapped within the pores of 'the material, and the vibrational energy of the sound dissipated by the flexing of the material. It is, however, found that the use of these sound deadening materials in fabricating acoustical panels produces a relatively soft surface panel subject to marrin-g, and of such structural weakness as to become distortedwith time. Additionally, the porous nature of conventional sound absorbing materials tends to accumulate dirt, and any attempts to paint or clean the exposed surfaces of these acoustical panels either clogs the pores thereof with resultant elimination of the sound deadening properties, or produces further deterioration of the panel.
It is accordingly among the objects of the invention to provide an improved acoustical panel having an exposed surface subject to ready cleaning or other maintenance procedures.
Another object of the invention is to provide an improved acoustical panel With an exposed surface which may be painted or otherwise treated without interfering with the sound deadening properties of the panel.
A further object of the invention is to provide an acoustical panel with improved means for trapping sound in proximity to the sound deadening material of the panel.
Another object of the invention is to provide an improved sound deadening panel having a relatively strong exposed surface in which the rigidity and strength of the surface does not produce undesired reflection of the sound waves impinging thereon.
According to the invention, an improved acoustical tile embodying the instant invention is formed by means of a sound absorptive element such as conventionally available intercellular or fibrous board. Cellulose boards, mineral fi ber boards, fiberglass, or rockwool may readily be employed. Arranged over the surface of the sound absorptive element which is normally intended for positioning in sound receiving position with respect to the area in which sound is to be deadened, is a cellular lattice. This lattice may be fabricated of any one of a large variety of materials such as paper, sheet metal, plastic or the like. Expanded paper board is found particularly suitable. The lattice defines a plurality of cells adjacent 3,351,154 Patented Nov. 7, 1967 the sound receiving surface of the sound absorptive element. A perforate covering sheet formed of any one of a large variety of suitable sheet material such as sheet steel, sheet plastic, or. the like is secured over the lattice with the perforations of the covering sheet permitting transmission of sound through said sheet to the cells defined by the lattice. The covering sheet is selected from that class of materials subject to ready cleaning, painting, or the provision of desired decorative motifs thereon.
A feature of the invention resides in the sound trapping properties of the lattice which acts to form a resonator trapping the sound in proximity to the sound absorp tive element to insure damping of the sound.
In the accompanying drawings in which are shown one or more of various possible embodiments of the several features of the invention.
FIG. 1 is a schematic cross sectional view through a room or the like area showing the novel acoustical panel employed asia ceiling tile,
7 FIG. 2 is a perspective view with parts 'broken away of an acoustical panel made in accordance with the teachings of this invention and on a larger scale,
FIG. 3 is a cross sectional view taken on line 3-3 of FIG. 2 showing the details of the structural components of the panel,
FIG. 4 is a fragmentary detail sectional view showing an acoustical panel made in accordance with the teachings of this invention in which the edges of the covering panel are turned up to enclose the lattice and sound absorbing board to provide acleanjoint between panels,
The density, and thickness of the sound absorptive element is selected, dependent on the sound absorptive qualities desired, and production and handling considerations. 3
In the illustrative embodiment of the invention, only the un'dersurface 12 of the board 11 is shown as intended for sound impingement thereon. To this sound impinging sur face 12 is secured a lattice 13, the wall of which defines a plurality of cells 14. The lattice 13 may be fabricated in a variety of ways of a large variety of materials. Thus, paper board, sheet plastic, molded plastics, or molded fiber board, or the material employed for the'sound absorptive element itself may be employed in fabricating the lattice.
By way of example, it is found that expanded paper board stock arranged in the illustrated honeycomb lattice may be satisfactorily employed. This paper board stock lattice 13 is secured to the sound impinging surface of the sound absorbing board 11 by the use of glue or the like adhesives.
It has further been found that better structural proper ties are obtained by forcing the edge of the lattice 13 into the sound absorptive board 11 as shown in FIG. 3.
Arranged over the lattice 13 to sandwich the lattice between itself and the sound absorbing board 11 is a covering plate 15 formed with a plurality of spaced perforations 16. Covering plate 15 is formed of a relatively rigid sheet material such as sheet plastic, or any one of that class of materials having desired structural rigidity. Sheet steel is found particularly suitable. The perforations 16 are spaced so as to insure the free passage. of air through the covering plate 15 to the cells 14 defined by the walls of lattice 13. The materials of which the covering plate are formed are selected from a class of material subject to ready maintenance, ready cleaning and having desired textures suitable for use in the .areas in which the plate is employed. Covering plate 15 is secured to the lattice 'by utilization of conventional fastening techniques. Thus, when expanded paper board is employed for forming the lattice, paper bonding adhesives have been found particularly suitable.
Alternatively, it will be understood by those skilled in the art that the covering plate and lattice may be integrally molded of materials such as metal, plastic or the like within the scope of the invention.
In the FIG. 4 embodiment of the invention, the panel board 410 is shown as formed to provide a plurality of discreet panel sections. The panel board 410 is substantially identical to the panel board as illustrated in FIGS. 2 and 3. However, the configuration of the covering plate is made such as to provide this covering plate 15 with a plurality of upturned peripheral edges 416 which serve to define a discreet panel, and implement the installation of the panels to provide a clean straight joint between abutting panels.
As shown illustratively in FIG. 5, the rear surface of the panel 10, on that face of the sound absorptive boar-d 11 observe to the sound impinging undersurface 12 thereof, as illustrated, will be formed with a sound transmission loss coating 50 such as vinyl, enamel, or the like coating materials providing a relatively impervious surface.
In use, the afore-described panel board may be made of any suitable dimensions. Where formed of the conventional rectangular panels, these panels are arranged to cover the area which it is intended to provide with desired sound deadening properties. Thus, as best shown in FIG. 1, the panels '10 are shown as arranged to provide sound deadening ceiling tiles. The ceiling tiles 10 are shown suspended by supporting channels C depending from hangers H in conventional fashion.
It is thus seen that a simple effective sound deadening panel has been provided in which desired sound deadening properties are obtained by utilization of the conventional sound absorptive materials. However, the sound absorptive materials have their sound deadening properties enhanced by the provision of resonating cells which serve to trap the sound to be deadened in proximity to the sound absorptive surface, and the exposed covering panel =15 is formed of a material which serves the two-fold function of providing a surface to reflect the sound entrapped within the cells back to the sound deadening surface, and additionally provides a surface of sufiicient rigidity to implement the formation of desired decorative finishes and permits the ready cleaning of the wall or ceiling panel.
The size and number of the perforations per cell of lattice and the size and depth of the cells of the lattice may be varied to obtain resonance at any required frequency. The sound absorptive properties of the sound absorptive board may be selected to provide an optimum degree of damping in the specific cell of the lattice. Various different facing perforation patterns and lattice cell size can be used to broaden the frequency range of the resonator should this be desired. Furthermore, the resistance of the perforated metal facing may be increased by the introduction of a thin, porous fabric 51, such as thin gauze or paper between the perforated metal and the lattice cells.
As many changes could be made in the above constructions, and many apparently widely different embodiments of this invention could be made without departing from the scope of the claims, it is intended that all matter contained in the above description or shown in the accompanying drawings shall be interpreted as illustrative and not in a limiting sense.
Having thus described my invention, what 1 claim as new and desire to secure by Letters Patent of the United States is:
1. An'acoustical panel comprising a sound absorptive element having a surface adapted for arrangement in sound receiving position with respect to any area in which sound is to be deadened, a cellular lattice positioned over the sound receiving surface of said sound absorptive element, said lattice defining a plurality of cells, an edge of said cellular lattice adjacent said sound absorptive element being embedded into said sound asborptive element, and a perforate rigid covering plate arranged over the surface of said lattice opposed to the sound absorptive element and secured to said lattice, the perforation of said covering plate permitting transmission of sound through said plate to the cells defined by said lattice.
2. The combination set forth in claim 1 in which said covering plate has its peripheral edge turned inwardly so as to encompass the edges of the sound absorptive element.
3. The combination set forth in claim 1 in which said sound absorptive element has the surface thereof remote from the lattice, coated with a relatively impervious coating to seal said surface.
4. The combination set forth in claim 1 in which a sheet of thin porous material is interposed between the covering plate and the lattice.
References Cited UNITED STATES PATENTS 2,148,496 2/1939 Park 18133.1 2,271,929 2/1942 Venzie 181--33.1 3,043,730 7/1962 Adie 18l33.1 3,111,188 11/1963 Rees et al 181-33.1
FOREIGN PATENTS 206,535 4/ 1956 Australia. 723,621 2/1955 Great Britain.
RICHARD B. WILKINSON, Primary Examiner.
R. S. WARD, Examiner.

Claims (1)

1. AN ACOUSTICAL PANEL COMPRISING A SOUND ABSORPTIVE ELEMENT HAVING A SURFACE ADAPTED FOR ARRANGEMENT IN SOUND RECEIVING POSITION WITH RESPECT TO ANY AREA IN WHICH SOUND IS TO BE DEADENED, CELLULAR LATTICE POSITIONED OVER THE SOUND RECEIVING SURFACE OF SAID SOUND ABSORPTIVE ELEMENT, SAID LATTICE DEFINING A PLURALITY OF CELLS, AN EDGE OF SAID CELLULAR LATTIVE ADJACENT SAID SOUND ABSORPTIVE ELEMENT BEING EMBEDDED INTO SAID SOUND ASBORPTIVE ELEMENT, AND A PERFORATE RIGID COVERING PLATE ARRANGED OVER THE SURFACE OF SAID LATTIVE OPPOSED TO THE SOUND ABSORPTIVE ELEMENT AND SECURED TO SAID LATTIVE, THE PERFORATION OF SAID COVERING PLATE PERMITTING TRANSMISSON OF SOUND THROUGH SAID PLATE TO THE CELLS DEFINED BY SAID LATTICE.
US524069A 1964-06-01 1966-02-01 Acoustical panel with cellular lattice embedded into sound absorptive element Expired - Lifetime US3351154A (en)

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US37131064A 1964-06-01 1964-06-01
US524069A US3351154A (en) 1964-06-01 1966-02-01 Acoustical panel with cellular lattice embedded into sound absorptive element

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3584700A (en) * 1969-06-10 1971-06-15 Peter L Jurisich Sound absorbing honeycomb panel
US3905443A (en) * 1972-11-06 1975-09-16 Jean Louis Sieuzac Walls with resonant cavities
US3971867A (en) * 1974-07-29 1976-07-27 Randall Robert L Decorative acoustical building panel
US4043444A (en) * 1975-09-02 1977-08-23 Kaiser Aluminum & Chemical Corporation Cup accumulator assembly
US4130682A (en) * 1978-03-24 1978-12-19 Lauko John W Sound absorbing device
US6176964B1 (en) * 1997-10-20 2001-01-23 Vought Aircraft Industries, Inc. Method of fabricating an acoustic liner
US20070017739A1 (en) * 2003-10-30 2007-01-25 Ichiro Yamagiwa Sound absorbing structure
US20070295554A1 (en) * 2004-06-16 2007-12-27 Geiger Technik Gmbh Sound Proofing Device and Device for Conducting a Fluid
ITTO20090086A1 (en) * 2009-02-09 2010-08-10 Ugo Camuri SYSTEM FOR DAMPING NOISE WITHIN CLOSED ENVIRONMENTS
US8839590B1 (en) * 2012-06-28 2014-09-23 FF Walls, LLC Acoustical grid and method of use

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2148496A (en) * 1936-12-31 1939-02-28 Owens Corning Fiberglass Corp Installation of acoustical insulating material
US2271929A (en) * 1942-02-03 Building interior construction
GB723621A (en) * 1950-07-15 1955-02-09 Lockheed Aircraft Corp Improvements in or relating to a light weight laminated building unit
US3043730A (en) * 1957-09-03 1962-07-10 Dow Chemical Co Foamed construction element
US3111188A (en) * 1960-02-26 1963-11-19 Owens Corning Fiberglass Corp Acoustical tile

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2271929A (en) * 1942-02-03 Building interior construction
US2148496A (en) * 1936-12-31 1939-02-28 Owens Corning Fiberglass Corp Installation of acoustical insulating material
GB723621A (en) * 1950-07-15 1955-02-09 Lockheed Aircraft Corp Improvements in or relating to a light weight laminated building unit
US3043730A (en) * 1957-09-03 1962-07-10 Dow Chemical Co Foamed construction element
US3111188A (en) * 1960-02-26 1963-11-19 Owens Corning Fiberglass Corp Acoustical tile

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3584700A (en) * 1969-06-10 1971-06-15 Peter L Jurisich Sound absorbing honeycomb panel
US3905443A (en) * 1972-11-06 1975-09-16 Jean Louis Sieuzac Walls with resonant cavities
US3971867A (en) * 1974-07-29 1976-07-27 Randall Robert L Decorative acoustical building panel
US4043444A (en) * 1975-09-02 1977-08-23 Kaiser Aluminum & Chemical Corporation Cup accumulator assembly
US4130682A (en) * 1978-03-24 1978-12-19 Lauko John W Sound absorbing device
US6176964B1 (en) * 1997-10-20 2001-01-23 Vought Aircraft Industries, Inc. Method of fabricating an acoustic liner
US20070017739A1 (en) * 2003-10-30 2007-01-25 Ichiro Yamagiwa Sound absorbing structure
US20070295554A1 (en) * 2004-06-16 2007-12-27 Geiger Technik Gmbh Sound Proofing Device and Device for Conducting a Fluid
ITTO20090086A1 (en) * 2009-02-09 2010-08-10 Ugo Camuri SYSTEM FOR DAMPING NOISE WITHIN CLOSED ENVIRONMENTS
US8839590B1 (en) * 2012-06-28 2014-09-23 FF Walls, LLC Acoustical grid and method of use

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