EP0013513B1 - Sound absorbing structure - Google Patents

Sound absorbing structure Download PDF

Info

Publication number
EP0013513B1
EP0013513B1 EP79303073A EP79303073A EP0013513B1 EP 0013513 B1 EP0013513 B1 EP 0013513B1 EP 79303073 A EP79303073 A EP 79303073A EP 79303073 A EP79303073 A EP 79303073A EP 0013513 B1 EP0013513 B1 EP 0013513B1
Authority
EP
European Patent Office
Prior art keywords
foil
sheet material
sound absorbing
sheet
absorbing structure
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
EP79303073A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0013513A1 (en
Inventor
Kurt Hjelholt
Niels Christian Dyrving
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.)
Daempa AS
Original Assignee
Daempa AS
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 Daempa AS filed Critical Daempa AS
Priority to AT79303073T priority Critical patent/ATE9017T1/de
Publication of EP0013513A1 publication Critical patent/EP0013513A1/en
Application granted granted Critical
Publication of EP0013513B1 publication Critical patent/EP0013513B1/en
Expired legal-status Critical Current

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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
    • E04B9/045—Ceilings; Construction of ceilings, e.g. false ceilings; Ceiling construction with regard to insulation comprising slabs, panels, sheets or the like being laminated
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
    • E04B1/82—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to sound only
    • E04B1/84—Sound-absorbing elements
    • E04B1/8409—Sound-absorbing elements sheet-shaped
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
    • E04B1/82—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to sound only
    • E04B1/84—Sound-absorbing elements
    • E04B2001/8457—Solid slabs or blocks
    • E04B2001/8461—Solid slabs or blocks layered
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
    • E04B1/82—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to sound only
    • E04B1/84—Sound-absorbing elements
    • E04B2001/8457—Solid slabs or blocks
    • E04B2001/8476—Solid slabs or blocks with acoustical cavities, with or without acoustical filling

Definitions

  • the stated purpose is to prevent an air flow along the upper side of the sheet material and thereby also to counteract an air circulation through this perforated sheet material, without substantially reducing the sound absorbing effect, especially in the high frequency range, as would be the case when a tight foil were glued flat to the perforated sheet material.
  • the known ceiling lining when applied in practice, has proved not to come up, in all cases, to expectations with regard to the sound absorbing effect.
  • the plastic foil has turned out to have a reducing effect on the sound absorbing capacity of the mineral wool, to such extent, in some cases, that the mineral wool becomes almost ineffective, irrespective of its thickness.
  • this reducing effect varies substantially dependent on the physical characteristics of the plastic foil, especially its composition, its melting point, and its thickness and variations in thickness, and it has been found that these factors can vary in one and the same roll of plastic foil to such an extent as to strongly influence the said reducing effect.
  • the glue stripes constitute a further important factor, as it can be difficult to control their thickness and width with sufficient accuracy, and because they must be expected, by providing a direct contact between the foil and the sheet material, to reduce the effective absorption area proportionally to the area of the glue stripes.
  • the present invention has for its object to provide a sound absorbing structure consisting also of perforated sheet and foil but having a sound absorbing capacity which even under practical conditions can be controlled adequately.
  • a sound absorbing structure is known from US-A-3 827 999 which comprises a perforated face plate of sheet metal, a backing sheet covering the perforated face plate and spacing means provided between the opposed surfaces of the face plate and the backing sheet and forming a firm bond therebetween.
  • This liner is of circular configuration so that it may be positioned about the periphery of a bladed rotor generating an airflow and acoustic field from the tips of the blades, and the spacing means of this known liner are formed by a honeycomb or another layer of partitioned cellular material, sandwiched in between the face plate and the backing sheet.
  • a particular feature of the liner is that the axes of the cavities, bounded by the perforated face plate, the backing sheet or plate, and the partitions of the intermediate layer, are slanted relative to the local tangential direction of the liner.
  • the sound absorbing structure of the present invention comprises only a thin perforated sheet material, such as aluminium or steel sheet, a plastics foil secured to one side of the sheet having a thickness of 10-50 ⁇ m, and spacing means secured between the sheet material and the foil and dividing the space between the sheet material and the foil into a great plurality of cellular cavities, the spacing between the sheet material and the foil being chosen so as to give the optimum sound absorption of the sound to be absorbed.
  • the sound absorbing effect is due to the fact that the foil is divided into a great number of small areas or small diaphragms, which vibrate or oscillate independently and out of time with the vibrations of the perforated sheet material.
  • the said diaphragms or cells are given a regular shape, for example a quadratic or hexagonal shape, but this is of minor importance, since a gauze-like material, such as glass fiber gauze, has also proved suitable instead of a netting provided with regular meshes.
  • An important advantage of the sound absorbing structure according to the invention is that unintended minor variations originating from slightly varying conditions during the production of the foil, especially unintended variations in its thickness and composition, have practically no importance for the sound absorbing capacity of the finished structure.
  • Said capacity may, on the other hand, be varied within a rather wide range, if so desired, in particular according to the prevailing frequency range, by changing the thickness and perforation ratio of the sheet material, the thickness of the foil and the netting, and the size and shape of the net meshes.
  • the desired distance between the sheet material and the foil can also be secured in another way than by sandwiching of netting or the like between the parts in question, e.g. the netting may form part of the foil, or said foil and/or the sheet material may be provided with low ribs or protuberances to secure the required spacing.
  • the structure comprises a rectangular sheet 1 of steel or aluminium which is perforated between the parallel lines 2, 2 so that a pair of opposite marginal portions 3, 3 are left without perforations.
  • the netting 5 is adhesively attached to both the plastic foil 4 and the metal sheet 1 and forms a layer of air-filled cells therebetween which are closed by the plastic foil or film but communicate with the surrounding air through the perforations of the metal sheet 1.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Acoustics & Sound (AREA)
  • Structural Engineering (AREA)
  • Civil Engineering (AREA)
  • Electromagnetism (AREA)
  • Building Environments (AREA)
  • Vehicle Interior And Exterior Ornaments, Soundproofing, And Insulation (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)
  • Waveguide Aerials (AREA)
  • External Artificial Organs (AREA)
  • Golf Clubs (AREA)
EP79303073A 1979-01-04 1979-12-28 Sound absorbing structure Expired EP0013513B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT79303073T ATE9017T1 (de) 1979-01-04 1979-12-28 Schalldaemmende struktur.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DK4379A DK4379A (da) 1979-01-04 1979-01-04 Lydabsorberingsaggregat
DK43/79 1979-01-04

Publications (2)

Publication Number Publication Date
EP0013513A1 EP0013513A1 (en) 1980-07-23
EP0013513B1 true EP0013513B1 (en) 1984-08-15

Family

ID=8089085

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79303073A Expired EP0013513B1 (en) 1979-01-04 1979-12-28 Sound absorbing structure

Country Status (11)

Country Link
EP (1) EP0013513B1 (enrdf_load_stackoverflow)
JP (1) JPS5592446A (enrdf_load_stackoverflow)
AT (1) ATE9017T1 (enrdf_load_stackoverflow)
AU (1) AU533557B2 (enrdf_load_stackoverflow)
DE (1) DE2967185D1 (enrdf_load_stackoverflow)
DK (1) DK4379A (enrdf_load_stackoverflow)
EG (1) EG14896A (enrdf_load_stackoverflow)
ES (1) ES256657Y (enrdf_load_stackoverflow)
FI (1) FI800007A7 (enrdf_load_stackoverflow)
MX (1) MX149377A (enrdf_load_stackoverflow)
NO (1) NO794220L (enrdf_load_stackoverflow)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3242940A1 (de) * 1982-11-20 1984-05-24 Hans Julius 6303 Hungen Schmitt Akustisch wirksames bauelement
DE4007556C2 (de) * 1990-03-09 1998-05-07 Gruenzweig & Hartmann Montage Resonatorkulisse für Kulissenschalldämpfer
JP2522604B2 (ja) * 1990-04-26 1996-08-07 株式会社ユニックス 吸音材およびその製造方法
CA2091288C (en) * 1992-03-13 1995-11-28 Toru Morimoto Membranous-vibration sound absorbing materials
IT231856Y1 (it) * 1993-03-05 1999-08-06 Eurofibre Spa Pannello termoisolante e fonoassorbente
ES2237411T5 (es) 2000-03-20 2009-06-03 Newmat, S.A Material polimero de hoja flexible para estructuras suspendidas y falso techo que comprende este material.
DE10337878B4 (de) 2003-08-18 2008-02-21 Silu Verwaltung Ag Montageband mit abschnittsweiser Abdeckfolie
FR2926099B1 (fr) * 2008-01-09 2010-03-19 Normalu Nappe pour parois tendues accoustiques etanches et partiellement translucides
FR2970009B1 (fr) * 2010-12-30 2021-06-11 Normalu Ensemble acoustiquement absorbant
JP7003154B2 (ja) * 2017-05-08 2022-01-20 クヴァドラ ソフト セルズ エー／エス 天井または部屋の壁に取り付けられるように適合された建築用パネル、およびそのような建築用パネルの製造方法

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3821999A (en) * 1972-09-05 1974-07-02 Mc Donnell Douglas Corp Acoustic liner

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2192653A (en) * 1937-11-13 1940-03-05 Schenk Eduard Acoustic construction
US2966954A (en) * 1957-07-11 1961-01-03 Celotex Corp Acoustical correction element
US3948347A (en) * 1974-11-25 1976-04-06 Gallagher-Kaiser Corporation Acoustical panel
JPS5719759Y2 (enrdf_load_stackoverflow) * 1976-01-28 1982-04-26

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3821999A (en) * 1972-09-05 1974-07-02 Mc Donnell Douglas Corp Acoustic liner

Also Published As

Publication number Publication date
JPS5592446A (en) 1980-07-12
MX149377A (es) 1983-10-28
DE2967185D1 (en) 1984-09-20
AU533557B2 (en) 1983-12-01
EG14896A (en) 1986-12-30
ES256657Y (es) 1981-12-16
ES256657U (es) 1981-07-01
ATE9017T1 (de) 1984-09-15
EP0013513A1 (en) 1980-07-23
JPS6310258B2 (enrdf_load_stackoverflow) 1988-03-04
FI800007A7 (fi) 1981-01-01
AU5426880A (en) 1980-07-10
DK4379A (da) 1980-07-05
NO794220L (no) 1980-07-07

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