US3103255A - Sound-absorbing wall covering - Google Patents

Sound-absorbing wall covering Download PDF

Info

Publication number
US3103255A
US3103255A US158776A US15877661A US3103255A US 3103255 A US3103255 A US 3103255A US 158776 A US158776 A US 158776A US 15877661 A US15877661 A US 15877661A US 3103255 A US3103255 A US 3103255A
Authority
US
United States
Prior art keywords
channels
sound
ceiling
wall
plate
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
Application number
US158776A
Inventor
Boschi Antonio
Pennati Giancarlo
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.)
Societa Applicazioni Gomma Antivibranti SAGA SpA
Original Assignee
Societa Applicazioni Gomma Antivibranti SAGA SpA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Societa Applicazioni Gomma Antivibranti SAGA SpA filed Critical Societa Applicazioni Gomma Antivibranti SAGA SpA
Application granted granted Critical
Publication of US3103255A publication Critical patent/US3103255A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • 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
    • E04B9/00—Ceilings; Construction of ceilings, e.g. false ceilings; Ceiling construction with regard to insulation
    • E04B9/001—Ceilings; Construction of ceilings, e.g. false ceilings; Ceiling construction with regard to insulation characterised by provisions for heat or sound insulation

Definitions

  • a principal object of the present invention is to provide a sound-absorbing covering or sound-absorber of the multiple-resonator type, which is relatively cheap and at the same time possesses a high absorbing power with regard to low and high acoustical frequencies.
  • Another object of the invention is to provide a soundabsorber suitable to be tuned to a relatively large band of low frequencies, according to the circumstances, without prejudice for its absorbing power with regard to higher frequencies, superior to about 2000 c./s.
  • the covering includes, in combination with a ceiling or wall of a space or room, a rigid plate corrugated or undulated with substantially trapezoidal-wave shaped undulations.
  • the plate or undulated member is fixed to a Wall in parallel spaced relation to the latter thereby to provide parallel channels open towards the said wall alternating with channels opening freely towards the space.
  • a relatively great number of apertures of relatively small areas in the bottom of each of the channels open towards the wall, and a relatively small number, of apertures of relatively large areas in the bottom of the channels open towards the space or. room with a filling of a fibrous material in those. channels only which open towards the wall.
  • the corrugated or undulated member is preferably moulded in fibre-cement, but also other materials can be used, such as metals or synthetic resins, provided they confer to the plate a sufficient indeformability under its own weight and that of the fillings.
  • each outside flank or outermost portion of each extreme channel presents a height' or cros-sasectional length greater than the depth of the remaining channels and ends with a fitting flange to the wall.
  • the two flanks provide therefore spacing members between the plate and the wall.
  • the bottom of an intermediate channel open towards the room can be heightened with respect to the general level of the member to the level of the two fitting flanges thereby to provide for an intermediate anchorage of the plate to the wall. This is particularly advantageous in the case in which the plate is fixed to the ceiling of the room.
  • the response to low frequencies depends on the number of these apertures, their diameter and the volume of the cavity mentioned above.
  • the volume of the spaces is in turn a function of the distance between the plate and the wall. The greater the distance, the lower the mean frequency of the absorbed band.
  • suitable shims not shown, it is possible to tune the device according to the invention on any band of low frequencies included between about 80 c./s. and about 2000 c./s.
  • FIGURE 1 is a sectional perspective view of an embodiment of this invention applied to a ceiling of a room;
  • FIGURE 2 is a cross sectional View of another embodirnent.
  • Reference 10 indicates a ceiling of a room to which is secured by means of nails 11 a plate 12 moulded in cement-asbestos.
  • This material is found particularly advantageous because, besides assuring to the plate a good self-support, it presents also a great inertia with regard to acoustical vibrations and so it seldom resonates. In other Words, this material has a high inner friction, which damps every incipient acoustical vibration.
  • the plate thickness is between two and four millimeters depending on its dimensions.
  • the plate is rectangular in plan and is corrugated to a trapezoidal wave shape forming channels 12a which open downwardly, that is towards the space or room in which sound absorbing is to take place, alternating with channels.
  • each channel 12b which open towards the ceiling 10.
  • a mineral fiber sliver 13 which fills its respective channel to a level not higher than that of the bottoms 14 of the downwardly open channels 12a.
  • Such sliver is preferably glued to the walls of the respective channel by means of any suitable adhesive.
  • the first channel on the right in FlGURE 1 is shown without the respective fibrous filling, thereby to render visible two longitudinal rows of circular apertures 15 in the bottom 16 of the channel.
  • Such apertures are provided in all the channels 12b.
  • the apertures 15 have each a relatively small diameter and are relatively close to one another.
  • each aperture 15 has associated therewith a relatively small fr-action of such volume.
  • each aperture 17 corresponds a relatively great fraction, several times greater (in volume towards the room and each of them ends as a flange 20 by which the nails 11 fasten the plate to the ceiling.
  • the height of the flanks 18, 19 determines therefore the smallest distance between the plate and ceiling.
  • the practical effects, considering the diameter and disrtibution density of the apertures 17 in the bottoms 14 of the downwardly open channels 12a are such that the smallest distance should be determined to obtain with regard to relatively low acoustical frequencies (40-2000 c./s.), the highest absorption within the band adjacent the high limit of these frequencies, such as the band 8004000 c./s. for example. In this manner frequencies which are less than 800-c./s. will be absorbed somewhat less efiiciently, which does not present, however, any inconvenience in practice.
  • the plates In practice, before application, the usual preliminary phonornetric measurements will reveal the band in the field of'low frequencies prevailing in the room to be sound I insulated, whereupon the thickness of the spacing listels may be determined.
  • the plates lz can present relatively great dimensions, when measuredtransversely of the channels.
  • the flanks 22, 22 (FIGURE 2) of an intermediate channel 12a can extend upwardly so that the bottom of this channel is at the level fo the terminal fastening flanges 20 of the plate, whereby said bottom too can be nailed to the ceiling .
  • the operation of the present sound-absorbing covering- is not based exclusively on the Helmholtzs resonance effect. Presumably a following interpretation is valid.
  • Sound waves of a relatively high frequency are more directional than those of a relatively low frequency. Furthermore, absorption of relatively high frequencies does not involve apar-ticular selectivity of the absorbing medium or means: in other words, all the frequencies between about 2000 c./s. and about 10,00015,000 c./s. are absorbed substantially to the same degree (in general satisfactory) by means of a suitable layer of mineral or vegetable fibers.
  • nant systems must be at least roughly tuned to that low frequency band which prevails in the field 40-72000 c./s.
  • the channels which are trapezoidally shaped, allow extension remarkably of the limits of such hand, without a notable drop in absorption factor, as is lrnown in the art.
  • the trapezoidal chanpress the low frequency waves, leading them towards therelatively large apertures 17,'while the extinctionof such waves due to resonance is carried out by the aircase formed between the plate 12 and the ceiling 10.
  • each bottom 14, the ceiling 10 and the imaginary planes indicated with 30 and 31 in FIGURE 1 define in this air-case virtual primary resonators, in which a great proportion of the energy contained in low frequency waves is extinguished. A part of these waves is reflected by the ceiling 10 towards the channels 12b open towards the ceiling and which form together with the latter secondary resonators, they too virtual because delirninated partly by the imaginary planes 31, 32 (FIGURE 1).
  • FIGURE 1 clearly shows that the volume of these virtual secondary resonators is greater than that of primary res onators, and this fact is very favourable to the effects of the present invention; in fact, due to the virtuality of the planes '30, 31 deliminating the primary resonators, only the acoustical components still having a certain directional character easily form stationary waves between the bottom 14 and the ceiling 10, while the less directional components escape and spread laterally. But such less directional components have the lowest frequency among all frequencies present and the highests volumes of the virtual secondary resonators are just the most suitable means for their absorption.
  • a sound-absorber comprising, an undulated member of substantially rigid sheet material having undulations defining a plurality of adjacent parallel channels of a substantially trapezoidalcross-sectional shape, all of said channels having a small base ridge defined by said undulated member and alternate ones of said channels having a large base area opening in a common direction, said member having two outermost portions each defining a r V for securing said sound-absorber to a wall or ceilingde-' fining a space between theisound-absorber or wall, and the nels12a open towards the ambient. and destined tov manipulate the low frequencies. seem.
  • a sound-absorber comprising, an undulated member of substantially rigid sheet material having undulas tions defining a plurality of adjacent parallel channels of a, substantially trapezoidal. cross-sectional shape, all of said channels having a small base ridge defined by said undulated member and alternate ones of said channels having a large base area opening in a common direction, said member having two outermost portionseach defining a side of a respective channel and each having a longer cross-sectional length than the remaining undulations of a said member, eachof said outermost portions having a flange fon securing said sound-absorber to.
  • a sound-absorber comprising, 'an undulated member of substantially rigid sheet material, having undula- 'tions defining a plurality of adjacent parallel channelsof a substantially trapezoidal cross-sectional shape, 'all' of said channels having a small baseyridge defined y Said undulated member and alternate ones of said channe1s" 5 6 having a large base area opening in a common direction, disposed substantially flush with the ridges of the undulasaid member having two outermost portions each detions defining the channels in which said filling is disposed.
  • each of said outermost portions hav- ,5 UNITED STATES PATENTS ing a flange for securing said sound-absorber to a Wall or ceiling defining a space between the sound-absorber gif g 1g or wall, and the channels opening toward said space com- 2902854 Greene 1959 prising a sound-absorbing filling therein, the ridges of 'f' said undulations each having a plurality of spaced through 10 FOREIGN PATENTS apentures therein, and said sound-absorbing filling being 296,295 Switzerland Apr. 17, 1954

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Building Environments (AREA)

Description

Sept. 10, 1963 A. BoscHl ETAL ,103,
' SOUND-ABSORBING WALL COVERING Filed Dec. 12, 1961 United States Patent 3,103,255 SOUND-ABSORBLNG WALL COVERING Antonio Boschi and Giancarlo Pennati, Milan, 'Italy, assignors to Societa Applicazioni Gomma Anti'vibranti SAGA S.p.A., Milan, Italy Filed Dec. 12, 1961, Ser. No. 158,776 Claims priority, application Italy Dec. 23, 1960 1 3 Claims. (Cl. 18133) This invention relates to the technique oi sound absorbing, tor example, in silencing workshops, ofiices, cinemas and other places wherever noise is to be absorbed and acoustical reverberations are to be prevented.
Modern techniques in sound absorbing employ multipleresonator panels based on the principle of Helmholtzs resonators, which have a remarkable sound absorbing power. However, such panels are relatively expensive. Their great cost prevents their-use to any large extent in small industries and h-andicraftsman workshops, tor example.
A principal object of the present invention is to provide a sound-absorbing covering or sound-absorber of the multiple-resonator type, which is relatively cheap and at the same time possesses a high absorbing power with regard to low and high acoustical frequencies.
Another object of the invention is to provide a soundabsorber suitable to be tuned to a relatively large band of low frequencies, according to the circumstances, without prejudice for its absorbing power with regard to higher frequencies, superior to about 2000 c./s.
According tothe invention, the covering includes, in combination with a ceiling or wall of a space or room, a rigid plate corrugated or undulated with substantially trapezoidal-wave shaped undulations. The plate or undulated member is fixed to a Wall in parallel spaced relation to the latter thereby to provide parallel channels open towards the said wall alternating with channels opening freely towards the space. A relatively great number of apertures of relatively small areas in the bottom of each of the channels open towards the wall, and a relatively small number, of apertures of relatively large areas in the bottom of the channels open towards the space or. room with a filling of a fibrous material in those. channels only which open towards the wall. I
The corrugated or undulated member is preferably moulded in fibre-cement, but also other materials can be used, such as metals or synthetic resins, provided they confer to the plate a sufficient indeformability under its own weight and that of the fillings.
According to an important and advantageous'teature of the invention, each outside flank or outermost portion of each extreme channel presents a height' or cros-sasectional length greater than the depth of the remaining channels and ends with a fitting flange to the wall. The two flanks provide therefore spacing members between the plate and the wall.
In case of plates of substantialdimensions, the bottom of an intermediate channel open towards the room can be heightened with respect to the general level of the member to the level of the two fitting flanges thereby to provide for an intermediate anchorage of the plate to the wall. This is particularly advantageous in the case in which the plate is fixed to the ceiling of the room.
The spacing of the plate with respect to the wall. pro- 3,103,255 Patented Sept. 10, 1963 2 vides a cavity between the plate and wall bridging a selected number of channels open towards the wall forming a resonant case which is common to all the apertures in the bottom of such channels.
The response to low frequencies depends on the number of these apertures, their diameter and the volume of the cavity mentioned above. The volume of the spaces is in turn a function of the distance between the plate and the wall. The greater the distance, the lower the mean frequency of the absorbed band. Thus, by interposing between the fitting flanges on the plate and the wall suitable shims, not shown, it is possible to tune the device according to the invention on any band of low frequencies included between about 80 c./s. and about 2000 c./s.
Other features and advantages of the invention will 0 result from .the following description with reference to the appended drawings, in which:
FIGURE 1 is a sectional perspective view of an embodiment of this invention applied to a ceiling of a room;
FIGURE 2 is a cross sectional View of another embodirnent.
1n the drawings, similar reference numbers indicate equal or equivalent parts.
Reference 10 indicates a ceiling of a room to which is secured by means of nails 11 a plate 12 moulded in cement-asbestos. This material is found particularly advantageous because, besides assuring to the plate a good self-support, it presents also a great inertia with regard to acoustical vibrations and so it seldom resonates. In other Words, this material has a high inner friction, which damps every incipient acoustical vibration. In general, the plate thickness is between two and four millimeters depending on its dimensions. The plate is rectangular in plan and is corrugated to a trapezoidal wave shape forming channels 12a which open downwardly, that is towards the space or room in which sound absorbing is to take place, alternating with channels. 12b which open towards the ceiling 10. In each channel 12b is placed a mineral fiber sliver 13 which fills its respective channel to a level not higher than that of the bottoms 14 of the downwardly open channels 12a. Such sliver is preferably glued to the walls of the respective channel by means of any suitable adhesive. The first channel on the right in FlGURE 1 is shown without the respective fibrous filling, thereby to render visible two longitudinal rows of circular apertures 15 in the bottom 16 of the channel. Such apertures are provided in all the channels 12b. The apertures 15 have each a relatively small diameter and are relatively close to one another.
In the bottom 14 of each channel 12a open towards the room one row only of circular apertures 17 of a relatively large diameter is provided, the apertures 17 being appreciably spaced from one another. So, considering the volume of the channels 12b open towards the ceiling, each aperture 15 has associated therewith a relatively small fr-action of such volume. On the contrary, considering the volume of the free space between the plate .12
and the ceiling 10, to each aperture 17 corresponds a relatively great fraction, several times greater (in volume towards the room and each of them ends as a flange 20 by which the nails 11 fasten the plate to the ceiling.
The height of the flanks 18, 19 determines therefore the smallest distance between the plate and ceiling. The practical effects, considering the diameter and disrtibution density of the apertures 17 in the bottoms 14 of the downwardly open channels 12a are such that the smallest distance should be determined to obtain with regard to relatively low acoustical frequencies (40-2000 c./s.), the highest absorption within the band adjacent the high limit of these frequencies, such as the band 8004000 c./s. for example. In this manner frequencies which are less than 800-c./s. will be absorbed somewhat less efiiciently, which does not present, however, any inconvenience in practice. So, for example, in a case in which the sound or noise to be absorbed presents a maximum frequency of 200 c./'s., the distance between the plate 12 and the ceiling In such a way, the plates In practice, before application, the usual preliminary phonornetric measurements will reveal the band in the field of'low frequencies prevailing in the room to be sound I insulated, whereupon the thickness of the spacing listels may be determined. I
The plates lz can present relatively great dimensions, when measuredtransversely of the channels. In such a case, to prevent the plates, from bowing downwardly, the flanks 22, 22 (FIGURE 2) of an intermediate channel 12a can extend upwardly so that the bottom of this channel is at the level fo the terminal fastening flanges 20 of the plate, whereby said bottom too can be nailed to the ceiling Apparently, in comparison with multiple-resonator panels, the operation of the present sound-absorbing covering-is not based exclusively on the Helmholtzs resonance effect. Presumably a following interpretation is valid.
Sound waves of a relatively high frequency are more directional than those of a relatively low frequency. Furthermore, absorption of relatively high frequencies does not involve apar-ticular selectivity of the absorbing medium or means: in other words, all the frequencies between about 2000 c./s. and about 10,00015,000 c./s. are absorbed substantially to the same degree (in general satisfactory) by means of a suitable layer of mineral or vegetable fibers.
' In the specific case,'high frequency waves are received by the very high number of apertures 15 and, subdivided into separate wave fronts, conveyed towards the heaps Q fibres 13; The directionality of high frequency waves gives here rise to innumerable reflections and deflections of the single wave fronts with consequent dissipation on their energyprincipally by way of the fibers and secondarily by way .of resonators. formed by the channels 12b containing the fibers.
nant systems must be at least roughly tuned to that low frequency band which prevails in the field 40-72000 c./s. I The channels, which are trapezoidally shaped, allow extension remarkably of the limits of such hand, without a notable drop in absorption factor, as is lrnown in the art. However, in. the. present case, the trapezoidal chanpress the low frequency waves, leading them towards therelatively large apertures 17,'while the extinctionof such waves due to resonance is carried out by the aircase formed between the plate 12 and the ceiling 10.
The air volumes delimitated by each bottom 14, the ceiling 10 and the imaginary planes indicated with 30 and 31 in FIGURE 1 define in this air-case virtual primary resonators, in which a great proportion of the energy contained in low frequency waves is extinguished. A part of these waves is reflected by the ceiling 10 towards the channels 12b open towards the ceiling and which form together with the latter secondary resonators, they too virtual because delirninated partly by the imaginary planes 31, 32 (FIGURE 1).
Of course, the exact position of the planes 30, 31, 32 can be different from that shown for illustrative purposes. FIGURE 1 clearly shows that the volume of these virtual secondary resonators is greater than that of primary res onators, and this fact is very favourable to the effects of the present invention; in fact, due to the virtuality of the planes '30, 31 deliminating the primary resonators, only the acoustical components still having a certain directional character easily form stationary waves between the bottom 14 and the ceiling 10, while the less directional components escape and spread laterally. But such less directional components have the lowest frequency among all frequencies present and the highests volumes of the virtual secondary resonators are just the most suitable means for their absorption.
The above theory explains also both the necessity of a free space between the plate 12 and the ceiling 10, which bridges a number of channels 12b, and the capacity of the present sound-absorbing covering to absorb a large band of low frequencies even with an only rough tuning,
It is to be understood that the above theory does not limit the scope of this invention and should be considered only as an attempt of a logicalinterpretation of the phenomena discovered in laboratory tests on the above described coverings.
What we claim is:
1. A sound-absorber comprising, an undulated member of substantially rigid sheet material having undulations defining a plurality of adjacent parallel channels of a substantially trapezoidalcross-sectional shape, all of said channels having a small base ridge defined by said undulated member and alternate ones of said channels having a large base area opening in a common direction, said member having two outermost portions each defining a r V for securing said sound-absorber to a wall or ceilingde-' fining a space between theisound-absorber or wall, and the nels12a open towards the ambient. and destined tov manipulate the low frequencies. seem. to work as resonators in a very limited degreeonly; actually, they rather com- 'side of respective channel and each having a longer crosssectional length than the remaining, undulations of said membe each of said outermost portions having a. flange channels opening toward said space comprising a soundabsorbing filling therein. 7
. 2. A sound-absorber comprising, an undulated member of substantially rigid sheet material having undulas tions defining a plurality of adjacent parallel channels of a, substantially trapezoidal. cross-sectional shape, all of said channels having a small base ridge defined by said undulated member and alternate ones of said channels having a large base area opening in a common direction, said member having two outermost portionseach defining a side of a respective channel and each having a longer cross-sectional length than the remaining undulations of a said member, eachof said outermost portions having a flange fon securing said sound-absorber to. a wall: or; ceiling, defining. a. space between. the soundi-absorberor wall, and the: channels opening toward said space comprising a sound-absorbing filling therein, and the ridges of said undulations each having a plurality of spaced,
through apertures therein. 7
,3. A sound-absorber comprising, 'an undulated member of substantially rigid sheet material, having undula- 'tions defining a plurality of adjacent parallel channelsof a substantially trapezoidal cross-sectional shape, 'all' of said channels having a small baseyridge defined y Said undulated member and alternate ones of said channe1s" 5 6 having a large base area opening in a common direction, disposed substantially flush with the ridges of the undulasaid member having two outermost portions each detions defining the channels in which said filling is disposed. fining a side of a respective channel and each having 2 longer cross-sectional length than the remaining undula References Cited in the file of this Patellt tions of said member, each of said outermost portions hav- ,5 UNITED STATES PATENTS ing a flange for securing said sound-absorber to a Wall or ceiling defining a space between the sound-absorber gif g 1g or wall, and the channels opening toward said space com- 2902854 Greene 1959 prising a sound-absorbing filling therein, the ridges of 'f' said undulations each having a plurality of spaced through 10 FOREIGN PATENTS apentures therein, and said sound-absorbing filling being 296,295 Switzerland Apr. 17, 1954

Claims (1)

1. A SOUND-ABSORBER COMPRISING, AN UNDUALTED MEMBER OF SUBSTANTIALLY RIGID SHEET MATERIAL HAVING UNDULATIONS DEFINING A PLURALITY OF ADJACENT PARALLEL CHANNELS OF A SUBSTANTIALLY TRAPEZOIDAL CROSS-SECTIONAL SHAPE, ALL OF SAID CHANNELS HAVING A SMALL BASE RIDGE DEFINED BY SAID UNDULATED MEMBER AND ALTERNATE ONES OF SAID CHANNELS HAVING A LARGE BASE AREA OPENING IN A COMMON DIRECTION, SAID
US158776A 1960-12-23 1961-12-12 Sound-absorbing wall covering Expired - Lifetime US3103255A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT2197160 1960-12-23

Publications (1)

Publication Number Publication Date
US3103255A true US3103255A (en) 1963-09-10

Family

ID=11189577

Family Applications (1)

Application Number Title Priority Date Filing Date
US158776A Expired - Lifetime US3103255A (en) 1960-12-23 1961-12-12 Sound-absorbing wall covering

Country Status (2)

Country Link
US (1) US3103255A (en)
GB (1) GB946007A (en)

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3232372A (en) * 1963-07-30 1966-02-01 Gomma Antivibranti Applic Sound-absorbing covering
US3814208A (en) * 1971-01-11 1974-06-04 N Morresi Sound-absorbing panel for air-conditioning ducts and the like
US3861493A (en) * 1972-03-07 1975-01-21 Robertson Co H H Acoustically absorbent sheet metal structural building units
US3950912A (en) * 1973-06-21 1976-04-20 Bpa Byggproduktion Ab Sound attenuating walls
US4832152A (en) * 1988-03-22 1989-05-23 Herman Miller, Inc. Acoustic tile
US4971850A (en) * 1989-09-11 1990-11-20 Kuan Hong Lo Assembled sound-muffling thermal insulation board
US5243567A (en) * 1977-03-15 1993-09-07 Westinghouse Electric Corp. Sonar beam shaping with an acoustic baffle
US5362931A (en) * 1991-03-20 1994-11-08 Arthur Fries Panel shaped element, specifically for sound absorbing structures and a sound absorbing installation
US5624518A (en) * 1992-12-10 1997-04-29 Firma Carl Freudenberg Method of making a housing liner
US20040245427A1 (en) * 2002-06-05 2004-12-09 Paul Meisel Vibration isolating mount
US20060131104A1 (en) * 2003-02-24 2006-06-22 Zenzo Yamaguchi Sound-absorbing structure body
US20060289229A1 (en) * 2003-09-05 2006-12-28 Kabushiki Kaisha Kobe Seiko Sho Sound absorbing structure body and producing method thereof
US20070169991A1 (en) * 2003-06-26 2007-07-26 Ulrich Bertsch Device and method for heat and noise insulation of motor vehicles
US20070267248A1 (en) * 2006-05-17 2007-11-22 William Orlin Gudim Combination Acoustic Diffuser and Absorber and Method of Production Thereof
US20080164090A1 (en) * 2007-01-09 2008-07-10 Samw Hong Jen Wang Acoustic absorbing device
US20080172978A1 (en) * 2007-01-20 2008-07-24 Michael Caruso Screen wall system
US20080202846A1 (en) * 2007-02-23 2008-08-28 Mtec, Llc Device and method for dampening sound transmission and vibration
US20080289901A1 (en) * 2007-03-27 2008-11-27 Coury Charles C Acoustic panel
US20140060775A1 (en) * 2011-05-04 2014-03-06 H.D.S Technology Ag Room enclosure assembly, method for producing same and element therefor
US20160012811A1 (en) * 2013-02-27 2016-01-14 Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) Sound insulating structure
WO2024013662A1 (en) * 2022-07-12 2024-01-18 Elica S.P.A. A sound absorbing device

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1976946A (en) * 1933-01-20 1934-10-16 Burgess Lab Inc C F Acoustic tile
CH296295A (en) * 1953-10-05 1954-02-15 Gartenmann & Cie Ag C Build plate with ventilation holes.
US2887173A (en) * 1957-05-22 1959-05-19 G A Societa Per Azioni Sa Sound absorbing and insulating panel
US2902854A (en) * 1956-03-12 1959-09-08 Tecfab Inc Prefabricated roof or ceiling panel

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1976946A (en) * 1933-01-20 1934-10-16 Burgess Lab Inc C F Acoustic tile
CH296295A (en) * 1953-10-05 1954-02-15 Gartenmann & Cie Ag C Build plate with ventilation holes.
US2902854A (en) * 1956-03-12 1959-09-08 Tecfab Inc Prefabricated roof or ceiling panel
US2887173A (en) * 1957-05-22 1959-05-19 G A Societa Per Azioni Sa Sound absorbing and insulating panel

Cited By (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3232372A (en) * 1963-07-30 1966-02-01 Gomma Antivibranti Applic Sound-absorbing covering
US3814208A (en) * 1971-01-11 1974-06-04 N Morresi Sound-absorbing panel for air-conditioning ducts and the like
US3861493A (en) * 1972-03-07 1975-01-21 Robertson Co H H Acoustically absorbent sheet metal structural building units
US3950912A (en) * 1973-06-21 1976-04-20 Bpa Byggproduktion Ab Sound attenuating walls
US5243567A (en) * 1977-03-15 1993-09-07 Westinghouse Electric Corp. Sonar beam shaping with an acoustic baffle
US4832152A (en) * 1988-03-22 1989-05-23 Herman Miller, Inc. Acoustic tile
US4971850A (en) * 1989-09-11 1990-11-20 Kuan Hong Lo Assembled sound-muffling thermal insulation board
US5362931A (en) * 1991-03-20 1994-11-08 Arthur Fries Panel shaped element, specifically for sound absorbing structures and a sound absorbing installation
US5624518A (en) * 1992-12-10 1997-04-29 Firma Carl Freudenberg Method of making a housing liner
US20040245427A1 (en) * 2002-06-05 2004-12-09 Paul Meisel Vibration isolating mount
US7093814B2 (en) * 2002-06-05 2006-08-22 Kinetics Noise Control, Inc. Vibration isolating mount
US20060131104A1 (en) * 2003-02-24 2006-06-22 Zenzo Yamaguchi Sound-absorbing structure body
US20070169991A1 (en) * 2003-06-26 2007-07-26 Ulrich Bertsch Device and method for heat and noise insulation of motor vehicles
US20060289229A1 (en) * 2003-09-05 2006-12-28 Kabushiki Kaisha Kobe Seiko Sho Sound absorbing structure body and producing method thereof
US7520370B2 (en) * 2006-05-17 2009-04-21 William Orlin Gudim Combination acoustic diffuser and absorber and method of production thereof
US20070267248A1 (en) * 2006-05-17 2007-11-22 William Orlin Gudim Combination Acoustic Diffuser and Absorber and Method of Production Thereof
US20080164090A1 (en) * 2007-01-09 2008-07-10 Samw Hong Jen Wang Acoustic absorbing device
US7451855B2 (en) * 2007-01-09 2008-11-18 Samw Hong Jen Wang Acoustic absorbing device
US20080172978A1 (en) * 2007-01-20 2008-07-24 Michael Caruso Screen wall system
US20080202846A1 (en) * 2007-02-23 2008-08-28 Mtec, Llc Device and method for dampening sound transmission and vibration
US20080289901A1 (en) * 2007-03-27 2008-11-27 Coury Charles C Acoustic panel
US7721847B2 (en) 2007-03-27 2010-05-25 9 Wood, Inc. Acoustic panel
US20140060775A1 (en) * 2011-05-04 2014-03-06 H.D.S Technology Ag Room enclosure assembly, method for producing same and element therefor
US9273870B2 (en) * 2011-05-04 2016-03-01 H.D.S. Technology Ag Room enclosure assembly, method for producing same and element therefor
US20160012811A1 (en) * 2013-02-27 2016-01-14 Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) Sound insulating structure
US9564118B2 (en) * 2013-02-27 2017-02-07 Kobe Steel, Ltd. Sound insulating structure
WO2024013662A1 (en) * 2022-07-12 2024-01-18 Elica S.P.A. A sound absorbing device

Also Published As

Publication number Publication date
GB946007A (en) 1964-01-08

Similar Documents

Publication Publication Date Title
US3103255A (en) Sound-absorbing wall covering
US2887173A (en) Sound absorbing and insulating panel
US4434592A (en) Heat and sound insulating structure for boarding or other non-loadbearing wall
US3159235A (en) Acoustical partitions
US4441580A (en) Acoustical control media
US6033756A (en) Apparatus for and method of attenuating acoustic energy
US3095943A (en) Acoustical structure
US2410413A (en) Acoustic tile
US6789645B1 (en) Sound-insulating sandwich element
US20050263346A1 (en) Sound-absorbing structure and sound-absorbing unit
US10510331B2 (en) Sound absorbing structure for anechoic chamber and anechoic chamber including the same
US4562901A (en) Sound absorptive structural block with sequenced cavities
EP1061190B1 (en) Sound insulating sandwich element
US4071989A (en) Sound insulative masonry block
JPS6334263B2 (en)
US4842097A (en) Sound absorbing structure
US2528049A (en) Acoustic panel
US2922201A (en) Wooden stud partition
US2779429A (en) Sound absorbing structure
US2057071A (en) Sound insulation and material therefor
US3021914A (en) Acoustical panel
US3351154A (en) Acoustical panel with cellular lattice embedded into sound absorptive element
KR100756415B1 (en) Shock-absorbing material and floor impact noise reduction structure of building
US3115948A (en) Panel for the reduction of sound transmission
JP3503802B2 (en) Noise barrier