US3630310A - Sound-absorbing fence - Google Patents

Sound-absorbing fence Download PDF

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US3630310A
US3630310A US78492A US3630310DA US3630310A US 3630310 A US3630310 A US 3630310A US 78492 A US78492 A US 78492A US 3630310D A US3630310D A US 3630310DA US 3630310 A US3630310 A US 3630310A
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fence
sound
support
set forth
screen
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US78492A
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Kurt Federer
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U F Chemical Corp
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U F Chemical Corp
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    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
    • E01F8/00—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic
    • E01F8/0005—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic used in a wall type arrangement
    • E01F8/0047—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic used in a wall type arrangement with open cavities, e.g. for covering sunken roads
    • E01F8/0064—Perforated plate or mesh, e.g. as wall facing
    • E01F8/007—Perforated plate or mesh, e.g. as wall facing with damping material

Definitions

  • Sideline noise generated by airplanes on a runway, and noise generated by vehicles on a road may be contained by a fence essentially consisting of a supporting framework, a solid upright backing panel on the framework, and a layer of sound-absorbing foamed urea-formaldehyde or other plastic foam retained on the face of the plate directed toward the source of the noise by a screen of fabric, plastic, or metal practically transparent to the sound, A roof upwardly closes the space between the backing panel and the screen which is practically completely filled with the plastic foam.
  • FIGZ SOUND-ABSORBING FENCE This invention relates to noise abatement, and particularly to a noise-absorbing fence to be interposed between a source of noise and humans.
  • Noise from motorcars and trucks on a heavily traveled road is a source of annoyance, and may even be a danger to the health of people occupying buildings along the road.
  • Sideline noise from airplanes that is, the noise generated by airplanes while accelerating on a runway during takeoff and transmitted mainly laterally of the runway, is another recognized nuisance or health hazard. While rows of trees or hedges may absorb such noise, they are not always permissible, practical, nor readily available on short notice.
  • the primary object of this invention is the provision of a noise-reducing fence which can be erected quickly and at low cost, and which does not endanger the vehicles generating the noise.
  • the invention provides a support carrying a backing member.
  • a face of the support is upright in the operative position of the support.
  • a screen is mounted on the support and is substantially coextensive with the face of the backing member and spaced from the face so as to define a space therebetween which is substantially filled by sound-absorbing material, preferably plastic foam.
  • the space is upwardly closed by a roof member which protects the sound-absorbing material against rain when the fence is arranged outdoors, as will usually be the case.
  • FIG. 1 shows a sound-absorbing fence of the invention in front elevation
  • FIG. 2 illustrates the fence of FIG. 1 on a larger scale in fragmentary section on the line lI-ll.
  • FIG. 1 there is seen a fence whose supporting structure mainly consists of a horizontally elongated, rectangular frame I mounted in an upright position on several legs 2 spaced along the frame 1.
  • Horizontally elongated slats 3 are mounted as louvers in a common vertical plane in the frame 1 and are spaced from each other in the common plane so as to occupy the upper portion of the frame 1.
  • the lower frame portion is occupied by a perforated plate 13.
  • a screen 4 is mounted behind the slats 3 in the frame 1 and is largely obscured by the slats 3 and the perforated plate 13 in the view of FIG. 1.
  • the frame 1 is surmounted by a narrow, obliquely sloping roof 5 which projects sufficiently beyond the common plane of the slats 3 and of the plate 13 to protect all elements mounted on the frame I from rain or snow.
  • the frame 1 is closed rearwardly by a solid backing panel 6 impervious to moisture.
  • the screen 4 is mounted on ribs 7 on the plate 13 and on the rear edges of the slats 3 which are obliquely inclined in a direction downward and outward of the space between the screen 4 and the backing plate 6.
  • the screen 4 is a loose fabric or net of interwoven filaments of textile fibers, plastic, and/or metal which is practically 100 percent permeable to sound. It retains a unitary body 8 of polyurethane foam or urea-formaldehyde foam which fills the space between the backing panel 6 and the screen 4 and extends into the openings in the screen so as to be interlocked with the filaments of the same.
  • the foam body 8 is confined in a vertical direction between the bottom 9 of the frame I and the roof 5.
  • the legs 2 are of approximate inverted T-shape and extend downwardly from the frame bottom 9 in spaced alignment so that only one leg 2 is visible in FIG. 2, the downwardly directed faces of the several legs 2 engaging the ground in a support plane 10 which is normally approximately horizontal.
  • Aluminum is the preferred material of construction for the fence except as specifically described otherwise hereinabove,
  • a fence section having a horizontal length of 20 feet or more can readily be carried from a truck to its intended location by two workmen. Because of the relatively large surface presented to the wind by the fence, it is preferred to secure the legs 2 by stakes ll driven into the ground through openings in the legs 2.
  • the slats 3 and the perforated plate 13 provide a foraminous sound barrier which is effective in absorbing noise of low frequency, approximately l00 c.p.s. and less, when the spacing of the slats 3 and the openings in the perforated plate 13 are suitably dimensioned in a manner known in itself. Openings big enough to block low-frequency sound freely pass high-frequency sound, that is, sound of frequencies above 1,000 c.p.s.
  • the plastic foams, which are the preferred soundabsorbing materials constituting the body 8, are particularly effective in absorbing such high-frequency noise, as well as noise in the intermediate range of 100 to l,000 c.p.s.
  • plastic material is determined by secondary considerations. Polyurethane foam is usually heavier than urea-formaldehyde foam, and has greater mechanical strength. It is very much more costly, and urea-formaldehyde foam is preferred where mechanical strength is not sufficiently important to warrant the cost of the polyurethane foam. Other plastic foams are similarly effective, but not practical at this time.
  • the body 8 is preferably foamed in place in a manner known in itself under a gas pressure sufficient to fill the space between the screen 4 and the backing panel 6 and to interlock the plastic foam with the filaments of the screen.
  • the foam is introduced through a temporary opening in the frame I, the panel 6, or the screen 4, and foam extruded through the screen 4 is sheared off after it has set.
  • the panel 6 does not materially contribute to the acoustic efficiency of the fence if the foam body 8 is thick enough. It need not be imperforate unless necessary for acoustical reasons, and the protection afforded to the sound-absorbing body 8 by the plate 6 in the illustrated embodiment may be afforded by a portion of the roof 5 overhanging the panel as shown relative to the front of the fence.
  • the legs 2 may be permanently buried in the ground and may be modified to suit such a mode of installation.
  • the bottom 9 of the frame 1 may be spaced from the ground 1 foot or even more without significantly impairing the acoustic efficiency of the fence, and such spacing facilitates maintenance and housekeeping operations, but is not necessary.
  • the overall height of the fence will be chosen to suit the intended application.
  • a fence approximately 12 feet high may absorb as much as percent of the noise generated by vehicles on a highway when positioned close to the flowing traffic.
  • the light fence sections do not significantly endanger the occupants of vehicles which may crash into the fence, yet may sufficiently slow a vehicle, accidentally leaving the roadway, to reduce the probability of injury to the occupants.
  • the fence of the invention When installed along runways to a height to clear the wings and engines of most large commercial planes, the fence of the invention materially reduces sideline noise without causing serious structural damage to an aircraft which may accidentally strike the fence.
  • a sound-absorbing fence comprising, in combination:
  • said screen member being spaced from said face to define a space therebetween;
  • a roof member upwardly closing said space and protecting said material against rain when said fence is arranged outdoors.
  • said support includes a plurality of foot members downwardly extending from said backing member and having respective downwardly directed faces defining a common, substantially horizontal plane of support.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Fencing (AREA)

Abstract

Sideline noise generated by airplanes on a runway, and noise generated by vehicles on a road may be contained by a fence essentially consisting of a supporting framework, a solid upright backing panel on the framework, and a layer of sound-absorbing foamed urea-formaldehyde or other plastic foam retained on the face of the plate directed toward the source of the noise by a screen of fabric, plastic, or metal practically transparent to the sound. A roof upwardly closes the space between the backing panel and the screen which is practically completely filled with the plastic foam.

Description

United States Patent Inventor Appl. No.
Filed Patented Assignee Priority Kurt Federer Rapperswil, Switzerland 78,492
Oct. 6, 1970 Dec. 28., 1971 U. F. Chemical Corporation Woodside, N.Y.
Oct. 17, 1969 Switzerland SOUND-ABSORBING FENCE 8 Claims, 2 Drawing Figs.
US. Cl 181/33 G, 181/33 HE Int. Cl E01f 7/00, E04b 1/74 Field of Search 181/30, 33,
[56] References Cited UNITED STATES PATENTS 2,765,994 10/1956 .lordanoff l81/33.223 2,936,040 5/1960 Rennard l8l/33.223 3,007,539 11/1961 Breweretal l8l/33.l 3,037,726 6/1962 Phi1lips.....'. 181/33.223
Primary Examiner-Robert S. Ward, Jr. Attorney-Kelman and Berman ABSTRACT: Sideline noise generated by airplanes on a runway, and noise generated by vehicles on a road may be contained by a fence essentially consisting of a supporting framework, a solid upright backing panel on the framework, and a layer of sound-absorbing foamed urea-formaldehyde or other plastic foam retained on the face of the plate directed toward the source of the noise by a screen of fabric, plastic, or metal practically transparent to the sound, A roof upwardly closes the space between the backing panel and the screen which is practically completely filled with the plastic foam.
PATENTED nEc28 l97| FIGZ SOUND-ABSORBING FENCE This invention relates to noise abatement, and particularly to a noise-absorbing fence to be interposed between a source of noise and humans.
Noise from motorcars and trucks on a heavily traveled road is a source of annoyance, and may even be a danger to the health of people occupying buildings along the road. Sideline noise from airplanes, that is, the noise generated by airplanes while accelerating on a runway during takeoff and transmitted mainly laterally of the runway, is another recognized nuisance or health hazard. While rows of trees or hedges may absorb such noise, they are not always permissible, practical, nor readily available on short notice.
The primary object of this invention is the provision of a noise-reducing fence which can be erected quickly and at low cost, and which does not endanger the vehicles generating the noise.
ln its more specific aspects, the invention provides a support carrying a backing member. A face of the support is upright in the operative position of the support. A screen is mounted on the support and is substantially coextensive with the face of the backing member and spaced from the face so as to define a space therebetween which is substantially filled by sound-absorbing material, preferably plastic foam. The space is upwardly closed by a roof member which protects the sound-absorbing material against rain when the fence is arranged outdoors, as will usually be the case.
Other features, additional objects, and many of the attendant advantages of this invention will readily be appreciated as the same becomes better understood from the following detailed description of a preferred embodiment when considered in connection with the appended drawing in which:
FIG. 1 shows a sound-absorbing fence of the invention in front elevation; and
FIG. 2 illustrates the fence of FIG. 1 on a larger scale in fragmentary section on the line lI-ll.
Referring now to the drawing in detail, and initially to FIG. 1, there is seen a fence whose supporting structure mainly consists of a horizontally elongated, rectangular frame I mounted in an upright position on several legs 2 spaced along the frame 1. Horizontally elongated slats 3 are mounted as louvers in a common vertical plane in the frame 1 and are spaced from each other in the common plane so as to occupy the upper portion of the frame 1. The lower frame portion is occupied by a perforated plate 13.
A screen 4 is mounted behind the slats 3 in the frame 1 and is largely obscured by the slats 3 and the perforated plate 13 in the view of FIG. 1. The frame 1 is surmounted by a narrow, obliquely sloping roof 5 which projects sufficiently beyond the common plane of the slats 3 and of the plate 13 to protect all elements mounted on the frame I from rain or snow.
As is better seen in FIG. 2, the frame 1 is closed rearwardly by a solid backing panel 6 impervious to moisture. The screen 4 is mounted on ribs 7 on the plate 13 and on the rear edges of the slats 3 which are obliquely inclined in a direction downward and outward of the space between the screen 4 and the backing plate 6.
The screen 4 is a loose fabric or net of interwoven filaments of textile fibers, plastic, and/or metal which is practically 100 percent permeable to sound. It retains a unitary body 8 of polyurethane foam or urea-formaldehyde foam which fills the space between the backing panel 6 and the screen 4 and extends into the openings in the screen so as to be interlocked with the filaments of the same. The foam body 8 is confined in a vertical direction between the bottom 9 of the frame I and the roof 5.
The legs 2 are of approximate inverted T-shape and extend downwardly from the frame bottom 9 in spaced alignment so that only one leg 2 is visible in FIG. 2, the downwardly directed faces of the several legs 2 engaging the ground in a support plane 10 which is normally approximately horizontal.
Aluminum is the preferred material of construction for the fence except as specifically described otherwise hereinabove,
and a fence section having a horizontal length of 20 feet or more can readily be carried from a truck to its intended location by two workmen. Because of the relatively large surface presented to the wind by the fence, it is preferred to secure the legs 2 by stakes ll driven into the ground through openings in the legs 2.
The slats 3 and the perforated plate 13 provide a foraminous sound barrier which is effective in absorbing noise of low frequency, approximately l00 c.p.s. and less, when the spacing of the slats 3 and the openings in the perforated plate 13 are suitably dimensioned in a manner known in itself. Openings big enough to block low-frequency sound freely pass high-frequency sound, that is, sound of frequencies above 1,000 c.p.s. The plastic foams, which are the preferred soundabsorbing materials constituting the body 8, are particularly effective in absorbing such high-frequency noise, as well as noise in the intermediate range of 100 to l,000 c.p.s.
The choice of the plastic material is determined by secondary considerations. Polyurethane foam is usually heavier than urea-formaldehyde foam, and has greater mechanical strength. It is very much more costly, and urea-formaldehyde foam is preferred where mechanical strength is not sufficiently important to warrant the cost of the polyurethane foam. Other plastic foams are similarly effective, but not practical at this time.
The body 8 is preferably foamed in place in a manner known in itself under a gas pressure sufficient to fill the space between the screen 4 and the backing panel 6 and to interlock the plastic foam with the filaments of the screen. The foam is introduced through a temporary opening in the frame I, the panel 6, or the screen 4, and foam extruded through the screen 4 is sheared off after it has set.
The panel 6 does not materially contribute to the acoustic efficiency of the fence if the foam body 8 is thick enough. It need not be imperforate unless necessary for acoustical reasons, and the protection afforded to the sound-absorbing body 8 by the plate 6 in the illustrated embodiment may be afforded by a portion of the roof 5 overhanging the panel as shown relative to the front of the fence.
It is often advantageous to make the fence of the invention portable as shown, but it will be appreciated that the legs 2 may be permanently buried in the ground and may be modified to suit such a mode of installation. The bottom 9 of the frame 1 may be spaced from the ground 1 foot or even more without significantly impairing the acoustic efficiency of the fence, and such spacing facilitates maintenance and housekeeping operations, but is not necessary.
The overall height of the fence will be chosen to suit the intended application. A fence approximately 12 feet high may absorb as much as percent of the noise generated by vehicles on a highway when positioned close to the flowing traffic. The light fence sections do not significantly endanger the occupants of vehicles which may crash into the fence, yet may sufficiently slow a vehicle, accidentally leaving the roadway, to reduce the probability of injury to the occupants.
When installed along runways to a height to clear the wings and engines of most large commercial planes, the fence of the invention materially reduces sideline noise without causing serious structural damage to an aircraft which may accidentally strike the fence.
It should be understood, of course, that the foregoing disclosure relates only to a preferred embodiment of the invention, and that it is intended to cover all changes and modifications of the example of the invention herein chosen for the purpose of the disclosure which do not constitute departures from the spirit and scope of the invention set forth in the appended claims.
What is claimed is:
l. A sound-absorbing fence comprising, in combination:
a. a support;
b. a backing member mounted on said support and having an upright face when said support is in the operative position;
c. a screen member mounted on said support and substantially coextensive with said face,
1. said screen member being spaced from said face to define a space therebetween;
d. sound-absorbing material substantially filling said space;
and
e. a roof member upwardly closing said space and protecting said material against rain when said fence is arranged outdoors.
2. A fence as set forth in claim 1, a foraminous sound barrier mounted on said support and offset from said screen member in a direction away from said backing member, the openings in said sound barrier being dimensioned to absorb sounds oflow frequency while passing high-frequency sound.
3. A fence as set forth in claim 2, wherein said sound barrier includes a plurality of slats arranged substantially in a common plane and spaced from each other in said plane.
4. A fence as set forth in claim 2, wherein said sound barrier includes a perforated plate member.
5. A fence as set forth in claim 1, wherein said screen member is permeable to sound and essentially consists of interwoven metallic, plastic, or textile filaments.
6. A fence as set forth in claim 1, wherein said sound-absorbing material is a foam whose solid component is polyurethane or urea-formaldehyde.
7. A fence as set forth in claim 6, wherein said sound-ab sorbing material is a unitary body extending into the openings of said screen member and interlocked with the same.
8. A fence as set forth in claim 1, wherein said support includes a plurality of foot members downwardly extending from said backing member and having respective downwardly directed faces defining a common, substantially horizontal plane of support.

Claims (8)

1. A sound-absorbing fence comprising, in combination: a. a support; b. a backing member mounted on said support and having an upright face when said support is in the operative position; c. a screen member mounted on said support and substantially coextensive with said face, 1. said screen member being spaced from said face to define a space therebetween; d. sound-absorbing material substantially filling said space; and e. a roof member upwardly closing said space and protecting said material against rain when said fence is arranged outdoors.
2. A fence as set forth in claim 1, a foraminous sound barrier mounted on said support and offset from said screen member in a direction away from said backing member, the openings in said sound barrier being dimensioned to absorb sounds of low frequency while passing high-frequency sound.
3. A fence as set forth in claim 2, wherein said sound barrier includes a plurality of slats arranged substantially in a common plane and spaced from each other in said plane.
4. A fence as set forth in claim 2, wherein said sound barrier includes a perforated plate member.
5. A fence as set forth in claim 1, wherein said screen member is permeable to sound and essentially consists of interwoven metallic, plastic, or textile filaments.
6. A fence as set forth in claim 1, wherein said sound-absorbing material is a foam whose solid component is polyurethane or urea-formaldehyde.
7. A fence as set forth in claim 6, wherein said sound-absorbing material is a unitary body extending into the openings of said screen member and interlocked with the same.
8. A fence as set forth in claim 1, wherein said support includes a plurality of foot members downwardly extending from said backing member and having respective downwardly directed faces defining a common, substantially horizontal plane of support.
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Cited By (31)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2176708A1 (en) * 1972-03-20 1973-11-02 Rotterink Johannes
US3783968A (en) * 1972-12-29 1974-01-08 C Derry Sound barrier
US3858676A (en) * 1973-01-22 1975-01-07 Masurier Philip H Le Sound absorbing panel
US3922414A (en) * 1972-09-07 1975-11-25 Toray Industries Form composite structures
US3983956A (en) * 1974-11-04 1976-10-05 Manhart J Kenneth Noise reduction barrier
US4050538A (en) * 1975-06-05 1977-09-27 Societe D'etudes Generales De Communications Industrielles Et Civiles-Segic Noise reducing screen
FR2382736A2 (en) * 1977-03-03 1978-09-29 Bridgestone Tire Co Ltd NOISE REDUCTION DEVICE
FR2444119A1 (en) * 1978-12-15 1980-07-11 Coppet Gerard De Foam linings for holding plants on sound absorbent walls - alongside motorways etc. using agricultural grade foams loaded with earth and moisture
US4274506A (en) * 1977-09-28 1981-06-23 Blomgren Rolf B J R Noise shield
FR2501886A1 (en) * 1981-03-10 1982-09-17 Perrot Gabriel Sound absorbing screen panel - has separate panels of expanded metal and metal shavings with sound deadening material and protective sheets
US4358090A (en) * 1979-01-23 1982-11-09 Arbed S.A. Sound barrier for highway and other traffic
US4402384A (en) * 1981-11-04 1983-09-06 Hoover Universal, Inc. Sound barrier system
US4643271A (en) * 1984-12-18 1987-02-17 Thomas J. Kelley Sound barrier
US4674593A (en) * 1985-04-02 1987-06-23 Mccarty Danny W Sound barrier fence
US4838524A (en) * 1987-09-08 1989-06-13 Cyclops Corporation Noise barrier
FR2632672A1 (en) * 1988-06-14 1989-12-15 Smac Acieroid Sound absorption screen
US4964618A (en) * 1986-09-23 1990-10-23 Cyclops Corporation Fence system and components
US5031721A (en) * 1988-05-04 1991-07-16 Road Construction Authority Sound absorption barriers
US5093394A (en) * 1988-09-27 1992-03-03 Sheller-Globe Corporation Thermoformable acoustical mat composition and method
US5136821A (en) * 1990-10-29 1992-08-11 Cecco Trading, Inc. Method of forming noise attenuation barrier
GB2258482A (en) * 1991-08-01 1993-02-10 Prime Construction Concepts Li Noise barrier
FR2700410A1 (en) * 1993-01-11 1994-07-13 Gauthier Paul Composite acoustic screen.
FR2724675A1 (en) * 1994-09-19 1996-03-22 Tolartois Acoustic insulation panel to prevent noise pollution from traffic
US20040048046A1 (en) * 2000-11-06 2004-03-11 Bernard Geis Method for producing a panel substantially stretched on a frame and resulting panel
WO2006011885A2 (en) * 2004-06-30 2006-02-02 Otis Elevator Company Elevator cab ceiling with dissipative ventilation channel
US20080017441A1 (en) * 2006-07-21 2008-01-24 Mk Seiko Co., Ltd. Sound-deadening louver
US20080135328A1 (en) * 2006-12-07 2008-06-12 Mk Seiko Co., Ltd. Noise reduction device
US20090011696A1 (en) * 2004-05-07 2009-01-08 Christopher James Matthews Ventilation device and frame system
US8662249B2 (en) 2009-09-25 2014-03-04 Schlumberger Technology Corporation Multi-layered sound attenuation mechanism
US9650748B2 (en) 2014-01-21 2017-05-16 H. Fredrick Peterson Sound attenuating structure
US20180137850A1 (en) * 2016-11-17 2018-05-17 Sound Fighter Systems, Llc Sound barrier panel and system

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2765994A (en) * 1953-04-29 1956-10-09 Strato Port Corp Of America Unidirectional airport
US2936040A (en) * 1958-11-05 1960-05-10 Paul J Rennard Acoustical barrier fence
US3007539A (en) * 1957-10-04 1961-11-07 Reeves Bros Inc Sound shield
US3037726A (en) * 1959-07-02 1962-06-05 Stanray Corp Engine blast absorbing fence

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2765994A (en) * 1953-04-29 1956-10-09 Strato Port Corp Of America Unidirectional airport
US3007539A (en) * 1957-10-04 1961-11-07 Reeves Bros Inc Sound shield
US2936040A (en) * 1958-11-05 1960-05-10 Paul J Rennard Acoustical barrier fence
US3037726A (en) * 1959-07-02 1962-06-05 Stanray Corp Engine blast absorbing fence

Cited By (35)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2176708A1 (en) * 1972-03-20 1973-11-02 Rotterink Johannes
US3922414A (en) * 1972-09-07 1975-11-25 Toray Industries Form composite structures
US3783968A (en) * 1972-12-29 1974-01-08 C Derry Sound barrier
US3858676A (en) * 1973-01-22 1975-01-07 Masurier Philip H Le Sound absorbing panel
US3983956A (en) * 1974-11-04 1976-10-05 Manhart J Kenneth Noise reduction barrier
US4050538A (en) * 1975-06-05 1977-09-27 Societe D'etudes Generales De Communications Industrielles Et Civiles-Segic Noise reducing screen
FR2382736A2 (en) * 1977-03-03 1978-09-29 Bridgestone Tire Co Ltd NOISE REDUCTION DEVICE
US4274506A (en) * 1977-09-28 1981-06-23 Blomgren Rolf B J R Noise shield
FR2444119A1 (en) * 1978-12-15 1980-07-11 Coppet Gerard De Foam linings for holding plants on sound absorbent walls - alongside motorways etc. using agricultural grade foams loaded with earth and moisture
US4358090A (en) * 1979-01-23 1982-11-09 Arbed S.A. Sound barrier for highway and other traffic
FR2501886A1 (en) * 1981-03-10 1982-09-17 Perrot Gabriel Sound absorbing screen panel - has separate panels of expanded metal and metal shavings with sound deadening material and protective sheets
US4402384A (en) * 1981-11-04 1983-09-06 Hoover Universal, Inc. Sound barrier system
US4643271A (en) * 1984-12-18 1987-02-17 Thomas J. Kelley Sound barrier
US4674593A (en) * 1985-04-02 1987-06-23 Mccarty Danny W Sound barrier fence
US4964618A (en) * 1986-09-23 1990-10-23 Cyclops Corporation Fence system and components
US4838524A (en) * 1987-09-08 1989-06-13 Cyclops Corporation Noise barrier
US5031721A (en) * 1988-05-04 1991-07-16 Road Construction Authority Sound absorption barriers
FR2632672A1 (en) * 1988-06-14 1989-12-15 Smac Acieroid Sound absorption screen
US5093394A (en) * 1988-09-27 1992-03-03 Sheller-Globe Corporation Thermoformable acoustical mat composition and method
US5136821A (en) * 1990-10-29 1992-08-11 Cecco Trading, Inc. Method of forming noise attenuation barrier
GB2258482A (en) * 1991-08-01 1993-02-10 Prime Construction Concepts Li Noise barrier
FR2700410A1 (en) * 1993-01-11 1994-07-13 Gauthier Paul Composite acoustic screen.
FR2724675A1 (en) * 1994-09-19 1996-03-22 Tolartois Acoustic insulation panel to prevent noise pollution from traffic
US7111434B2 (en) * 2000-11-06 2006-09-26 Clipso Swiss Ag Method for producing a panel substantially stretched on a frame and resulting panel
US20040048046A1 (en) * 2000-11-06 2004-03-11 Bernard Geis Method for producing a panel substantially stretched on a frame and resulting panel
US20090011696A1 (en) * 2004-05-07 2009-01-08 Christopher James Matthews Ventilation device and frame system
US8641494B2 (en) * 2004-05-07 2014-02-04 Silenceair International Pty Limited Ventilation device and frame system
WO2006011885A2 (en) * 2004-06-30 2006-02-02 Otis Elevator Company Elevator cab ceiling with dissipative ventilation channel
WO2006011885A3 (en) * 2004-06-30 2007-02-01 Otis Elevator Co Elevator cab ceiling with dissipative ventilation channel
US20080190711A1 (en) * 2004-06-30 2008-08-14 Patrick William P Elevator Cab Ceiling with Dissipative Ventilation Channel
US20080017441A1 (en) * 2006-07-21 2008-01-24 Mk Seiko Co., Ltd. Sound-deadening louver
US20080135328A1 (en) * 2006-12-07 2008-06-12 Mk Seiko Co., Ltd. Noise reduction device
US8662249B2 (en) 2009-09-25 2014-03-04 Schlumberger Technology Corporation Multi-layered sound attenuation mechanism
US9650748B2 (en) 2014-01-21 2017-05-16 H. Fredrick Peterson Sound attenuating structure
US20180137850A1 (en) * 2016-11-17 2018-05-17 Sound Fighter Systems, Llc Sound barrier panel and system

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