EP0447797B1 - Schalldämmbauteil - Google Patents

Schalldämmbauteil Download PDF

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Publication number
EP0447797B1
EP0447797B1 EP91102075A EP91102075A EP0447797B1 EP 0447797 B1 EP0447797 B1 EP 0447797B1 EP 91102075 A EP91102075 A EP 91102075A EP 91102075 A EP91102075 A EP 91102075A EP 0447797 B1 EP0447797 B1 EP 0447797B1
Authority
EP
European Patent Office
Prior art keywords
sound
damping element
element according
grooves
paper
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
EP91102075A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0447797A3 (en
EP0447797A2 (de
Inventor
Friedrich Priehs
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0447797A2 publication Critical patent/EP0447797A2/de
Publication of EP0447797A3 publication Critical patent/EP0447797A3/de
Application granted granted Critical
Publication of EP0447797B1 publication Critical patent/EP0447797B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/172—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using resonance effects

Definitions

  • the invention relates to a soundproofing component with surface profiles that are parallel to each other, separated from each other by webs, open to the outside grooves, the cross section of which has a slightly undercut shape, so that the sound entry slot merges into an expanding groove interior.
  • FIG. 15 A soundproofing plate is shown there in FIG. 15, which has the features mentioned above, the groove cross section corresponding approximately to a circular surface segment with more than 180 degrees of circumference.
  • the outer contour of the webs lying in a common plane is flat and is wider than the sound entry slot mentioned.
  • a sound absorber is known from DE-B1-28 34 683, which consists of a polyethylene foam plate which has channel-shaped cavities with different cross sections, which are connected to the environment (outside air) via slots.
  • the cavity cross sections can be round or be angular.
  • the depth of the slots mentioned is different.
  • This sound absorber is therefore not provided with surface profiles, but rather has a flat surface, the distance between the slots being a multiple of the slot width.
  • DE-A1 32 42 940 discloses an acoustically effective component made of a perforated or slotted panel onto which a nonwoven fabric is applied, which spans the perforations of the panel in a drum-like manner and thereby causes increased flow resistance in the area of the perforations, which increases the desired sound absorption capacity of the component Are defined.
  • the surface of the component covered by the nonwoven fabric has a smooth surface. The perforations form sharp edges with the plate surface.
  • DE-A1-26 02 839 discloses a plate which consists of a double-sided corrugated cardboard which forms a reinforcement, as well as a further plate and volumes of polyurethane foam, which are used as padding for the corrugated cardboard and for filling and reinforcing the folds and breaks produced by the shaping to serve. There is also a cladding covering and an elastomer solution, which at the same time ensures that the various components of the plate are connected and - after their polymerization - the rigidity of the foam and the cardboard.
  • the invention has for its object to improve the sound insulation effect of the component described above.
  • this object is achieved according to the invention in that the webs are rounded in a bead-like manner on their outer contour and do not form any smooth or sharp-edged reflection surfaces.
  • the grooves are close together and are only separated from one another by the bead-like rounded webs.
  • the sound entry slot is therefore comparatively much wider than in the embodiment explained at the beginning.
  • the surface of the soundproofing component designed according to the invention is thus predominantly open to the entry of sound waves into the grooves, this sound wave entry being only opposed by the linear webs which are rounded on their outer contour, but which do not form smooth or sharp-edged reflection surfaces.
  • the groove cross section can correspond approximately to a circular surface segment with more than 180 degrees of circumference or, in an alternative solution, can be approximately W-shaped.
  • the sound impact area of these groove profiles is considerably larger than in the known surface surveys. Due to the undercut design of the grooves can be within everyone Achieve a multiple impact of the sound waves on the inner walls of the groove, so that at least some of the sound waves practically "run dead".
  • the width of the sound entry slot and / or the inner contour of the grooves can be adapted accordingly at a constant frequency of a sound source in order to achieve optimal sound absorption.
  • the soundproofing component according to the invention preferably consists at least predominantly of paper foam or fluff, which is expediently composed of fifty parts paper and / or cardboard, thirty parts starch, e.g. B. wheat and twenty parts of polyvinyl alcohol (PVA).
  • paper foam or fluff which is expediently composed of fifty parts paper and / or cardboard, thirty parts starch, e.g. B. wheat and twenty parts of polyvinyl alcohol (PVA).
  • the PVA can be added as finely ground granules, as an aqueous solution or as a dispersion and leads to better foaming in the end product with good elasticity / flexibility.
  • Plasticizers and / or lubricants e.g. Glycerol can be added.
  • the soundproofing component as described above can be pressed or extruded.
  • the surface forming the grooves is formed by a correspondingly deformed cover film which is fixed on a carrier material consisting of paper foam or fluff.
  • the cover film is preferably made permeable to sound and can be a perforated plate or wire mesh.
  • the carrier material also has grooves running parallel to one another on its surface facing the cover film, which are similar in cross section to that of the cover film grooves but run transversely to them.
  • Figure 1 shows a detail of the corner area of the front view of a plate-shaped soundproofing component with an outwardly open groove 1, the cross section of which corresponds approximately to a circular area segment with more than 180 degrees of circumference, so that the sound inlet slot 2 merges into an expanding groove interior 3.
  • Lines 4 symbolizing the sound waves make it clear that a part of the sound waves "runs dead” due to multiple impacts on the inner wall of the groove.
  • Figure 2 shows a modified embodiment for the groove cross section.
  • the groove inner contour is approximately W-shaped and is composed of groove walls 5, 6 that are curved outwards and inwards.
  • the diameter and / or circumferential degrees of the grooves can be adapted to the sound frequency to be insulated in order to optimize the sound insulation.
  • FIG. 3 shows a plate-shaped soundproofing component with mutually opposite grooves (1) which are offset by half a groove pitch.
  • Such components can, for. B. as impact sound plates, which then only result in punctiform or linear loads between a cover plate, not shown, and the component according to the invention. Due to the offset groove arrangement, the appropriately bead-shaped webs 7, which separate the grooves 1 from one another, each face a groove 1. This increases the strength of the component.
  • Figure 4 shows that the soundproofing component can also be tubular. Also in this embodiment, mutually opposed and mutually offset grooves offset by half a groove pitch would be possible, in which case the inner grooves 1 in connection with the webs 7 separating them would bring about additional insulation of the pipe 8.
  • the soundproofing components shown in FIGS. 1 to 4 can consist of paper foam or paper fluff, which is preferably composed of paper and / or cardboard, starch and polyvinyl alcohol (PVA). Such components can be pressed or can also be extruded, the water-soluble PVA added as granules or dispersion serving as a plasticizer, which gives the paper foam or paper fluff greater flexibility. Anti-inflammatory additives, dyes or the like can also be added to the material.
  • PVA polyvinyl alcohol
  • cover film 9 which is fixed on a carrier material 10, which consists of paper foam or fluff.
  • the cover sheet 9 is preferably sound-permeable and can, for. B. be a perforated plate or wire mesh.
  • a non-woven fabric can be provided between the cover film 9 and the carrier material 10, in particular to absorb moisture.
  • FIG. 5 an embodiment according to FIG. 5 can be provided, in which the carrier material 10 also has grooves 1 running parallel to one another on its surface facing the cover film 9, which are similar in cross section to that of the cover film grooves, but run transversely to them.
  • the carrier material 10 then consists of a body such. B. according to Figure 1 or 2. Impinging sound waves, which still penetrate through the cover sheet 9 due to their intensity, are then broken again several times, absorbed and almost completely insulated.
  • Such an insulation board construction is expediently supported by a rigid rear wall made of wood, sheet metal or the like and is gripped by means of a frame (not shown).

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Laminated Bodies (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)
  • Building Environments (AREA)
EP91102075A 1990-03-20 1991-02-14 Schalldämmbauteil Expired - Lifetime EP0447797B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4008861 1990-03-20
DE4008861A DE4008861A1 (de) 1990-03-20 1990-03-20 Schalldaemmbauteil

Publications (3)

Publication Number Publication Date
EP0447797A2 EP0447797A2 (de) 1991-09-25
EP0447797A3 EP0447797A3 (en) 1992-10-21
EP0447797B1 true EP0447797B1 (de) 1995-01-18

Family

ID=6402603

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91102075A Expired - Lifetime EP0447797B1 (de) 1990-03-20 1991-02-14 Schalldämmbauteil

Country Status (3)

Country Link
EP (1) EP0447797B1 (es)
DE (2) DE4008861A1 (es)
ES (1) ES2067063T3 (es)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5660903A (en) 1992-08-11 1997-08-26 E. Khashoggi Industries Sheets having a highly inorganically filled organic polymer matrix
US5665442A (en) 1992-08-11 1997-09-09 E. Khashoggi Industries Laminated sheets having a highly inorganically filled organic polymer matrix

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5220535A (en) * 1991-06-18 1993-06-15 Raytheon Company Sonar baffles
DE10055521A1 (de) * 2000-11-09 2002-06-06 Kaefer Isoliertechnik Innenisolierung und Wandkonstruktion, insbesondere für die Verwendung im Schiffbau, sowie Verfahren zur Herstellung einer Wandkonstruktion
DE102005030711A1 (de) * 2005-06-29 2007-01-04 Frormann, Lars, Prof. Dr.-Ing. Verfahren zur Herstellung von Sandwichstrukturen mit beliebigen Deckschichten sowie kontinuierlich extrudierten und geprägten Papierwaben in der Kernschicht
GB0901982D0 (en) * 2009-02-06 2009-03-11 Univ Loughborough Attenuators, arrangements of attenuators, acoustic barriers and methods for constructing acoustic barriers
US9607600B2 (en) 2009-02-06 2017-03-28 Sonobex Limited Attenuators, arrangements of attenuators, acoustic barriers and methods for constructing acoustic barriers
JP2013250501A (ja) * 2012-06-04 2013-12-12 Three M Innovative Properties Co 吸音ボード
CN114541618A (zh) * 2022-04-01 2022-05-27 国网河南省电力公司电力科学研究院 一种降低电场畸变的声屏障系统及声环境改善方法

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1483366A (en) * 1922-10-09 1924-02-12 Mazer Jacob Sound-absorbing method and material
BE489534A (es) * 1949-04-12
FR2336246A2 (fr) * 1975-02-05 1977-07-22 Roth Sa Freres Procede de fabrication de panneaux en forme a base de carton et de mousse, et panneaux ainsi realises
JPS55105044A (en) * 1977-12-23 1980-08-12 Oji Paper Co Acoustic material
DE2834683C2 (de) * 1978-08-08 1980-07-24 Optac Wilfrid Weltin, 6074 Roedermark Schallabsorber
US4300978A (en) * 1979-07-06 1981-11-17 Rohr Industries, Inc. Bonding tool for venting honeycomb noise attenuation structure during manufacture
FR2469851A1 (fr) * 1979-11-12 1981-05-22 Siare Enceinte acoustique
DE3242940A1 (de) * 1982-11-20 1984-05-24 Hans Julius 6303 Hungen Schmitt Akustisch wirksames bauelement
DE3322204A1 (de) * 1983-06-21 1985-01-03 G + H Montage Gmbh, 6700 Ludwigshafen Schalldaempfer fuer gasfoermige medien
GB8817669D0 (en) * 1988-07-25 1988-09-01 Short Brothers Ltd Means for attenuating sound energy

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5660903A (en) 1992-08-11 1997-08-26 E. Khashoggi Industries Sheets having a highly inorganically filled organic polymer matrix
US5665442A (en) 1992-08-11 1997-09-09 E. Khashoggi Industries Laminated sheets having a highly inorganically filled organic polymer matrix

Also Published As

Publication number Publication date
DE4008861C2 (es) 1993-02-18
EP0447797A3 (en) 1992-10-21
DE59104281D1 (de) 1995-03-02
EP0447797A2 (de) 1991-09-25
DE4008861A1 (de) 1991-10-02
ES2067063T3 (es) 1995-03-16

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