EP0783164A2 - Elément d'atténuation du son, en particulier pour un écran amortisseur de son - Google Patents

Elément d'atténuation du son, en particulier pour un écran amortisseur de son Download PDF

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Publication number
EP0783164A2
EP0783164A2 EP96120853A EP96120853A EP0783164A2 EP 0783164 A2 EP0783164 A2 EP 0783164A2 EP 96120853 A EP96120853 A EP 96120853A EP 96120853 A EP96120853 A EP 96120853A EP 0783164 A2 EP0783164 A2 EP 0783164A2
Authority
EP
European Patent Office
Prior art keywords
sound
filling
damper element
lamellar
sound damper
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.)
Withdrawn
Application number
EP96120853A
Other languages
German (de)
English (en)
Other versions
EP0783164A3 (fr
Inventor
Jürgen Dr. Royar
Rolf Sommer
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.)
Saint Gobain Isover SA France
Original Assignee
Saint Gobain Isover SA France
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 Saint Gobain Isover SA France filed Critical Saint Gobain Isover SA France
Publication of EP0783164A2 publication Critical patent/EP0783164A2/fr
Publication of EP0783164A3 publication Critical patent/EP0783164A3/fr
Withdrawn legal-status Critical Current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
    • G10K11/162—Selection of materials
    • G10K11/168—Plural layers of different materials, e.g. sandwiches
    • 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
    • E04B1/76—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 heat only
    • E04B2001/7683—Fibrous blankets or panels characterised by the orientation of the fibres

Definitions

  • This invention relates to a sound damper element according to the preamble of claim 1.
  • Sound dampers are used for greatly reducing, i.e. damping, the airborne sound propagating through ducts without essentially obstructing the conduction of flowing media. Sound dampers are used in particular for reducing sound propagation in the duct systems of ventilation facilities, reducing the sound radiation of flow machines into the immediate surroundings, for example for ventilators, compressors, turbo jet propulsions, and also for damping openings for transport or airing and deairing between noisy rooms and rooms intended to be quiet, and for damping openings, e.g. for airing and deairing in acoustic capsules.
  • Sound-absorbent ducts have a wall lining whose damping mechanism removes part of the sound energy from the propagating sound wave.
  • Panel sound dampers are generally absorption sound dampers, the panel sound damper being formed in the simplest case by a frame receiving a filling of mineral, slag, glass or metal wool, whereby at least the principal surfaces of the panel sound damper, i.e. the surfaces extending parallel to the direction of sound propagation and, in a flow duct, in particular the surfaces limiting the flow duct, are formed as acoustically transparent enveloping surfaces. Such enveloping surfaces are frequently formed by perforated sheets and perforated plates.
  • absorption sound dampers are usually optimized up to now via the dimensioning and formation of the panel as such, usual mineral wool plates and the like being used for the filling.
  • this optimization is subject to restrictions due to the local conditions of installation for which the panel sound damper is being designed.
  • the problem of the invention is to use constructionally simple measures to obtain an optimization of sound damping, in particular the sound damping of a panel sound damper, which should expediently be done without impairing the structural conditions of the panel as such.
  • an improvement of sound damping is obtained by a special formation of the sound damper element filling, the layers being determined in such a way that the filling is formed by an absorption layer with low flow resistance perpendicular to the direction of sound propagation and a dissipation layer with high flow resistance parallel to the direction of sound propagation.
  • the absorption layer permits the greater part of the sound energy to penetrate very easily into the panel. This is very favorable for the efficiency of sound damping.
  • the dissipation layer with high flow resistance parallel to the direction of sound propagation causes the sound energy penetrating into the panel to be damped optimally on its propagation path since the kinetic energy of the vibrating medium particles (vibration energy) is transformed into thermal energy by way of the dissipation.
  • the special choice of filling one can thus achieve very good sound damping, regardless of the structural conditions of the panel as such, which can be conventionally constructed of a frame and suitable perforated plates.
  • the fiber orientation of the filling to extend predominantly perpendicular to the direction of sound propagation and thus perpendicular to the principal surfaces the panel sound damper, so that the absorption and dissipation layers can be integrated into just one layer.
  • so-called plates or mats characterized in that the fiber orientation extends predominantly in directional fashion, namely perpendicular to the plate or mat surfaces. It is especially suitable to use for this purpose so-called lamellar plates or lamellar mats, which are predominantly employed for cases of application where high compressive strength is important. Due to their special fiber orientation, however, these lamellar plates or lamellar mats are especially suitable for use in sound damper elements since with a proper fiber orientation perpendicular to the direction of sound propagation one achieves low flow resistance for the penetrating sound energy but high flow resistance for the sound propagation within the sound damper element.
  • lamellar plates or lamellar mats are characterized by high compressive strength, which in any case increases the stability of the filling material of such sound damper elements, this being of advantage in particular with pulsating sound sources and the accompanying pressure pulses.
  • bulk densities of the filling material ⁇ 25 kg/m 3 , in particular ⁇ 60 kg/m 3 , are especially suitable.
  • lamellar plates or lamellar mats one can also cover great thickness ranges, in particular approximately from 10 cm to 25 cm.
  • Figure 1 shows a strictly schematic representation of a panel element of a sound damper panel, panel element 1 being formed by frame 2 provided at least on the two principal surfaces 3 and 4 of the panel (i.e. the front shown in Figure 1 and the back not shown) with an acoustically transparent envelope, formed here by perforated plates. Within frame 2 there is sound-absorbent filling 5 of mineral wool. Such panel elements are disposed one on the other and side by side for the purpose of sound damping, being cramped at the joints. The direction of flow and thus the direction of sound propagation is indicated in Figure 1 by arrow F.
  • filling 5 consists of a lamellar plate with altogether four lamellae 6, 7, 8 and 9, the fiber orientation of the lamellar plate perpendicular to principal surfaces 3 and 4 and thus to the perforated plates being indicated by the dotted representation on the front surface of filling 5 apparent from graphically broken perforated plate 3 and by the short lines on the upper face of the panel element.
  • This special orientation of the lamellar plate fibers results in very low flow resistance perpendicular to the direction of sound propagation and thus perpendicular to principal surfaces 3 and 4 of panel element 1, but very high flow resistance in the direction of propagation and thus parallel to principal surfaces 3 and 4.
  • the thickness of the filling and the bulk density value of the filling are of course dependent on the actual case of application, but it has turned out that lamellar plates or lamellar mats are especially suitable with thicknesses in the range of 10 to 25 cm and bulk densities ⁇ 25 kg/m 3 , in particular ⁇ 60 kg/m 3 . All thickness ranges usual for acoustics can be covered with lamellar plates or mats.
  • sound-absorbent filling 5 is formed by mineral wool layer 15 wherein the fibers extend perpendicular to perforated plate 3, as shown schematically in Figure 3.
  • mineral wool layer 16 disposed therebehind has a fiber orientation perpendicular thereto so that the fibers of mineral wool layer 16 extend substantially parallel to perforated plate 3.
  • a lamellar plate is expediently used for mineral wool layer 15, whereas a usual mineral wool mat or mineral wool plate of usual bulk density can be used for mineral wool layer 16.
  • the lamellae are interconnected with a glass mat.
  • This glass mat is marked with reference sign 17 strictly schematically in Figure 3.
  • the lamellar plate of Figure 1 can also be provided with a glass mat.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)
  • Exhaust Silencers (AREA)
EP96120853A 1996-01-02 1996-12-23 Elément d'atténuation du son, en particulier pour un écran amortisseur de son Withdrawn EP0783164A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19600040 1996-01-02
DE1996100040 DE19600040A1 (de) 1996-01-02 1996-01-02 Schalldämpferelement, insbesondere für einen Kulissenschalldämfper

Publications (2)

Publication Number Publication Date
EP0783164A2 true EP0783164A2 (fr) 1997-07-09
EP0783164A3 EP0783164A3 (fr) 1999-04-07

Family

ID=7782066

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96120853A Withdrawn EP0783164A3 (fr) 1996-01-02 1996-12-23 Elément d'atténuation du son, en particulier pour un écran amortisseur de son

Country Status (2)

Country Link
EP (1) EP0783164A3 (fr)
DE (1) DE19600040A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6196351B1 (en) 1999-06-04 2001-03-06 Lancaster Glass Fibre Limited Silencer cartridge
EP1428953A1 (fr) * 2002-12-12 2004-06-16 Rheinhold & Mahla AG Panneau de délimitation spatiale
EP0950160B2 (fr) † 1997-10-21 2011-05-25 Saint-Gobain Isover Ensemble facade avec materiau isolant, poreux et translucide
CN116078101A (zh) * 2022-12-14 2023-05-09 山东丹弗尔医用科技有限公司 一种分子筛制氧装置及其使用方法

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5834711A (en) * 1997-07-09 1998-11-10 Johns Manville International, Inc. Sound control through resonance damping
DE10000418A1 (de) * 2000-01-07 2001-08-09 Abb Turbo Systems Ag Baden Verdichter eines Abgasturboladers

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1609728A1 (de) * 1965-04-23 1970-07-30 Mk Verbundbau Ombh & Co Kg Schalldaemmende Innenwand
US3928097A (en) * 1974-03-01 1975-12-23 Sauder Industries Process and machine for manufacturing insulation modules
DE8525130U1 (de) * 1985-09-03 1985-10-24 Gerb Akustik Consult GmbH, 4300 Essen Schalldämpferkulisse
DK156965C (da) * 1987-03-25 1990-03-19 Rockwool Int Udvendig, vandafvisende bygningsbeklaedning.
GB2231530B (en) * 1989-05-04 1992-10-28 Hunter Douglas Ind Bv Sandwich panel core structure
GB9004018D0 (en) * 1990-02-22 1990-04-18 Siderise Ltd Manufacture of mineral fibre products in layer form
DE4127401A1 (de) * 1991-08-19 1993-02-25 Gruenzweig & Hartmann Montage Schalldaempferkulisse fuer den einsatz bei hohen temperaturen
GB9207865D0 (en) * 1992-04-09 1992-05-27 Rockwool Ltd Mineral wool board

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0950160B2 (fr) † 1997-10-21 2011-05-25 Saint-Gobain Isover Ensemble facade avec materiau isolant, poreux et translucide
US6196351B1 (en) 1999-06-04 2001-03-06 Lancaster Glass Fibre Limited Silencer cartridge
EP1428953A1 (fr) * 2002-12-12 2004-06-16 Rheinhold & Mahla AG Panneau de délimitation spatiale
CN116078101A (zh) * 2022-12-14 2023-05-09 山东丹弗尔医用科技有限公司 一种分子筛制氧装置及其使用方法

Also Published As

Publication number Publication date
DE19600040A1 (de) 1997-07-03
EP0783164A3 (fr) 1999-04-07

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