EP0095125B1 - Flächiges Element zur Luftschall-Absorption - Google Patents

Flächiges Element zur Luftschall-Absorption Download PDF

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Publication number
EP0095125B1
EP0095125B1 EP83104841A EP83104841A EP0095125B1 EP 0095125 B1 EP0095125 B1 EP 0095125B1 EP 83104841 A EP83104841 A EP 83104841A EP 83104841 A EP83104841 A EP 83104841A EP 0095125 B1 EP0095125 B1 EP 0095125B1
Authority
EP
European Patent Office
Prior art keywords
film
sound
foam layer
wave absorption
foam
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
Application number
EP83104841A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0095125A2 (de
EP0095125A3 (en
Inventor
Walter Machholz
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.)
Metzeler Schaum GmbH
Original Assignee
Metzeler Schaum GmbH
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 Metzeler Schaum GmbH filed Critical Metzeler Schaum GmbH
Publication of EP0095125A2 publication Critical patent/EP0095125A2/de
Publication of EP0095125A3 publication Critical patent/EP0095125A3/de
Application granted granted Critical
Publication of EP0095125B1 publication Critical patent/EP0095125B1/de
Expired 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
    • 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.]
    • Y10T428/24479—Structurally defined web or sheet [e.g., overall dimension, etc.] including variation in thickness
    • Y10T428/24496—Foamed or cellular component
    • Y10T428/24504—Component comprises a polymer [e.g., rubber, etc.]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24479—Structurally defined web or sheet [e.g., overall dimension, etc.] including variation in thickness
    • Y10T428/24562—Interlaminar spaces
    • 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.]
    • Y10T428/24802—Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.]
    • Y10T428/24826—Spot bonds connect components

Definitions

  • the invention relates to a flat element for airborne sound absorption, consisting of a flexible, open-cell foam layer with an air-impermeable cover layer made of a film.
  • GB-A-1 579 897 Also known from GB-A-1 579 897 is a laminated, multilayer sound absorber, in which an air-impermeable film is connected to the actual absorber material as protection against contamination via a perforated or highly air-permeable spacer layer.
  • This elastic spacer layer has the task, on the one hand, of providing the necessary mechanical strength to the film which is untensioned due to the avoidance of reflection and, on the other hand, of allowing the sound waves to continue unimpeded into the absorber material, where they are then converted into heat.
  • the absorption essentially depends on the position and width of the frequency band.
  • the coordination between film and foam mass, i.e. their mutual assignment, attachment and mass ratio are often decisive. It is also essential that no additional fasteners are used in the form of foreign substances that would negatively affect the damping.
  • the invention has for its object to provide an element for airborne noise reduction, which has a higher efficiency compared to the known arrangements and which can be easily adapted in a wide range in terms of frequency and bandwidth.
  • the foam layer has at least on one side a profiled surface with wave-shaped, mutually offset bumps, on the profile tips of the membrane-like stretched plastic film with a thickness of less than 50 microns is selectively attached.
  • the corresponding hump-like profiling of the foam and the selective attachment of the film ensures that the film can practically vibrate like a freely stretched membrane.
  • the air cushion / plastic film resonance system also contributes to particularly good damping.
  • Such a structure dampens in particular low to medium frequencies.
  • the damping is essentially dependent on the film thickness in the sense that when the film becomes thicker, the lower frequencies are damped. In principle, attenuation to lower frequencies is possible by reinforcing the film and / or foam.
  • Another possible variation of the damping consists in changing the shape or the depth of the profile. It has been found to be particularly advantageous that the film and foam are connected directly to one another.
  • the foam layer 1 has a profiled surface with mutually offset rows of bumps 2 and 3.
  • a polyurethane foam with a bulk density of 16 to about 80 kg / m 3 can expediently be used as the material.
  • a thin plastic film 4 is then laminated onto the bump-like profile tips in such a way that the plastic film 4 is only connected to the foam at the profile tips 5 and 6.
  • the connection is expediently made by flame lamination, so that no additional material, such as adhesive, hinders the damping.
  • the film is expediently thinner than 50 microns and can consist of polyurethane, polyethylene or polyvinyl chloride.
  • the film 4 is connected to the foam only at relatively small points 5 and 6 which are far apart in relation to the fastening surface. This results in a large effective area of exposed film areas, which can vibrate freely like a membrane and thereby extract energy from the impinging sound waves, so that optimal damping is achieved.
  • the main areas of application for such flat elements are sound-absorbing linings of machine housings or motor enclosures or corresponding cabins.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)
  • Laminated Bodies (AREA)
  • Building Environments (AREA)
EP83104841A 1982-05-22 1983-05-17 Flächiges Element zur Luftschall-Absorption Expired EP0095125B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3219339A DE3219339C1 (de) 1982-05-22 1982-05-22 Flaechiges Element zur Luftschall-Absorption
DE3219339 1982-05-22

Publications (3)

Publication Number Publication Date
EP0095125A2 EP0095125A2 (de) 1983-11-30
EP0095125A3 EP0095125A3 (en) 1984-09-26
EP0095125B1 true EP0095125B1 (de) 1987-05-20

Family

ID=6164288

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83104841A Expired EP0095125B1 (de) 1982-05-22 1983-05-17 Flächiges Element zur Luftschall-Absorption

Country Status (5)

Country Link
US (1) US4469736A (enrdf_load_stackoverflow)
EP (1) EP0095125B1 (enrdf_load_stackoverflow)
JP (1) JPS58209792A (enrdf_load_stackoverflow)
DE (2) DE3219339C1 (enrdf_load_stackoverflow)
ES (1) ES272335Y (enrdf_load_stackoverflow)

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60113375A (ja) * 1983-11-24 1985-06-19 Mitsubishi Plastics Ind Ltd フロツピ−デイスクジヤケツト
IN170733B (enrdf_load_stackoverflow) * 1986-06-26 1992-05-09 Burlington Industries Inc
US4690847A (en) * 1986-06-26 1987-09-01 Burlington Industries, Inc. Cold weather garment structure
US4863791A (en) * 1987-04-06 1989-09-05 United Technologies Automotive, Inc. Sound absorption in foam core panels
FR2675936B1 (fr) * 1991-04-24 1993-08-20 Noisetec Sa Dispositif d'insonorisation, notamment pour systemes de ventilation.
DE9110552U1 (de) * 1991-08-26 1992-12-24 Irbit Research + Consulting Ag, Freiburg/Fribourg Motorraumkapselelement
JPH081114U (ja) * 1991-11-20 1996-07-02 株式会社ダイウレ 遮音材
US5858283A (en) * 1996-11-18 1999-01-12 Burris; William Alan Sparger
JPH1167402A (ja) * 1997-08-08 1999-03-09 Harness Sogo Gijutsu Kenkyusho:Kk 吸音材および該吸音材を備えたケーブルリール
GB9727469D0 (en) * 1997-12-30 1998-02-25 Sugden Kurt D Fabric material
DE10358595A1 (de) * 2003-12-15 2005-07-21 Cellofoam Gmbh & Co. Kg Schallabsorbierendes flächiges Schaumstoffmaterial
DE10358593A1 (de) * 2003-12-15 2005-07-14 Cellofoam Gmbh & Co. Kg Schallabsorbierendes flächiges Schaumstoffmaterial
JP2005283703A (ja) * 2004-03-29 2005-10-13 Inoac Corp 吸音材
DE502008002271D1 (de) 2007-10-23 2011-02-24 Retro Flex Ag Poröse Schallschutzschwerfolien, Schallschutzsystem und Verfahren zur Herstellung einer porösen Schallschutzschwerfolie
NZ606959A (en) * 2010-07-13 2014-05-30 Bellmax Acoustic Pty Ltd An acoustic panel
GB2486714A (en) * 2010-12-23 2012-06-27 Levolux At Ltd Acoustic louvre having sound energy absorption element encased by a watertight element
WO2014055991A1 (en) * 2012-10-05 2014-04-10 Leonard Michael R Layered insulation system
US9362799B2 (en) * 2014-04-14 2016-06-07 Cummins Power Generation Ip, Inc. Acoustic covering for a generator set enclosure with pressure sensitive adhesive
RU2593401C1 (ru) * 2015-02-25 2016-08-10 Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Воронежский государственный архитектурно-строительный университет" Звукопоглощающая панель
RU185081U1 (ru) * 2017-07-12 2018-11-21 Общество с ограниченной ответственностью "ШиКор" Звукоизоляционный материал

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2984312A (en) * 1959-04-24 1961-05-16 Owens Corning Fiberglass Corp Acoustical wall board
US3360423A (en) * 1961-09-21 1967-12-26 Gen Tire & Rubber Co Flexible structural foam sandwich construction
US3356562A (en) * 1964-06-22 1967-12-05 Cincinnati Ind Inc Materials and methods for the production of stereotype mats
JPS5112856B1 (enrdf_load_stackoverflow) * 1967-05-09 1976-04-22
US3712846A (en) * 1971-06-23 1973-01-23 Carpenter L & Co Acoustical panel
DE2246621A1 (de) * 1972-09-22 1974-03-28 Albert Schrey Akustikplatte
SE402142B (sv) * 1976-06-03 1978-06-19 Becker Wilhelm Ab Laminerad ljudabsorbent

Also Published As

Publication number Publication date
JPH0444279B2 (enrdf_load_stackoverflow) 1992-07-21
DE3371615D1 (en) 1987-06-25
US4469736A (en) 1984-09-04
ES272335U (es) 1983-11-16
EP0095125A2 (de) 1983-11-30
DE3219339C1 (de) 1983-02-03
JPS58209792A (ja) 1983-12-06
EP0095125A3 (en) 1984-09-26
ES272335Y (es) 1984-07-01

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