EP1950357A1 - Eléments acoustiques - Google Patents

Eléments acoustiques Download PDF

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Publication number
EP1950357A1
EP1950357A1 EP07405023A EP07405023A EP1950357A1 EP 1950357 A1 EP1950357 A1 EP 1950357A1 EP 07405023 A EP07405023 A EP 07405023A EP 07405023 A EP07405023 A EP 07405023A EP 1950357 A1 EP1950357 A1 EP 1950357A1
Authority
EP
European Patent Office
Prior art keywords
micro
sound
slots
glass
slot
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.)
Granted
Application number
EP07405023A
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German (de)
English (en)
Other versions
EP1950357B1 (fr
Inventor
Robert Bähler
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.)
ALBERS & CO.
Original Assignee
Akustik & Raum AG
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 Akustik & Raum AG filed Critical Akustik & Raum AG
Priority to DE502007004772T priority Critical patent/DE502007004772D1/de
Priority to EP07405023A priority patent/EP1950357B1/fr
Priority to AT07405023T priority patent/ATE478208T1/de
Priority to DK07405023.8T priority patent/DK1950357T3/da
Publication of EP1950357A1 publication Critical patent/EP1950357A1/fr
Application granted granted Critical
Publication of EP1950357B1 publication Critical patent/EP1950357B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • 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
    • E04B1/86—Sound-absorbing elements slab-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
    • E04B1/8409—Sound-absorbing elements sheet-shaped
    • 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

Definitions

  • the present invention relates to sound-absorbing absorption elements according to the preamble of independent patent claim 1, acoustic elements according to the preamble of independent claim 11 and to processes for the production of sound-absorbing absorption elements according to the preamble of independent claim 13.
  • acoustic elements with sound-absorbing properties from large-area, plate-shaped bodies which are provided with a plurality of holes or slots in order to allow the passage of the sound to be absorbed to sound-absorbing insulating materials arranged behind the plate-shaped bodies.
  • These plate-shaped elements are often made of wood, pressboard, multi-component fiber materials, gypsum or plastics and must comply with the applicable regulations for the construction sector, for example in terms of resistance to breakage and fire protection.
  • the common materials for the production of acoustic elements are practically exclusively opaque and the number and arrangement of holes and / or slots, as well as the use of the often fibrous insulation materials restricts architects and builders in the design freedom considerably.
  • the architecture requires open spaces and the increased use of hard building materials such as exposed concrete and glass for sound absorbers, which reduce the reverberation time without breaking through clear and transparent building structures. There is therefore a need for transparent acoustic elements that are not inferior to the known in terms of functionality and practicality.
  • the in the DE4315759 proposed absorber consist exclusively of one or more completely transparent plates, which are hardly excitable by airborne sound waves. They are enabled by a multitude of very small continuous holes in their space-facing surface in conjunction with a cavity arranged behind them for the absorption of incident sound waves in a wide frequency range in the audible range.
  • the use of such micro-perforated plates before a reverberant limitation to the sound absorption was of D.-Y. Maa already 1975 in Scientia Sinica 18, H. 1, P. 55 to 71 described.
  • the holes can be made by means of a drill, laser or plasma welding machine.
  • a novel microslipped sound absorber in glass is that the turbulence and friction of the air in the microslit, with the variable cavity and soundproof boundary provided by varying the slit length and slit width as well as the arbitrary arrangement of the micro slits in the surface, increases production technology very efficiently or can be reduced.
  • the sound energy is converted into heat energy in adjustable frequency ranges and the reverberation time is reduced over a wide frequency range.
  • the required open area in the glass to the extent of approximately 0.8 to 3.0% of the sound area, can be produced by suitable cutting processes with sufficient process reliability and with a 10 times shorter machining time compared to bores.
  • the risk of microcracks can be reduced by controlled slitting as opposed to microhole drilling. By an obvious reduction, the "stop and go" losses, the productivity can be substantially increased.
  • micro-slits in glass with a width of 0.05 to 1.0 mm, preferably less than 0.5, more preferably between 0.1 and 0.3 mm, can be distributed homogeneously or irregularly on the surface and arranged in straight, curved or other deviating from the line geometry and design ,
  • the arbitrary selectability of the micro-slot arrangement is limited only by the adjustment to the frequency range to be absorbed and the strength stress, respectively, the fracture resistance.
  • various micro-slits with slit widths of 0.4 mm, 0.6 mm and 0.8 mm can be combined in a single Absorption element combined to effectively absorb a wide range of sound frequencies can. It has been shown in tests that different slot widths have absorption maxima in different frequency ranges.
  • a safety glass plate 1 is shown schematically in a view of a first surface 2, which is provided with a multiplicity of micro slits 10 regularly distributed over the plate.
  • the width B of the slots is 0.1 to 1 mm, preferably 0.1 to 0.9 mm and the length L is selected between 1.1 to 20 mm.
  • the number of micro-slots is selected such that the totality of the slots forms an open area in the glass panel of 0.8 to 4%.
  • FIG. 1b shows a cross section through the plate 1 in the region of a row of slots along C-C. The absorption performance of a sound absorbing absorption element with uniformly distributed micro-slits over a wide frequency range, as shown in FIG. 1, is shown in FIG.
  • the micro-slits 11, 12, 13 are not uniformly distributed, but concentrated in two peripheral areas, so that the central area of the glass pane remains free of slits.
  • the slots are in the illustrated embodiment between 100 and 400 mm long, linear and arranged substantially parallel to each other. It is already clear from this simple sketching that, according to the present invention, the number of problematic puncture points, that is to say of risky drillings, can be reduced from thousands to, for example, six.
  • this advantage comes also to wear, however, it is additionally deviated from the linear shape of the slots and there are S-shaped curved micro slots 14 mounted in the glass plate.
  • the inventive cutting method allows such variants in the form of slots without problems.
  • FIG. 1 While in the embodiments shown so far only simple slots were mounted in the glass, an embodiment with a more complex sectional shape is shown in FIG.
  • the micro-slots are exemplarily concentrated on six areas 3. In each of these areas, starting from each approximately circular arc-shaped primary slot 15, a plurality of mutually parallel secondary slots 16 are arranged.
  • a comb-like or branched or radiating slot can be produced, which has a considerable length, which is available for sound absorption. Due to the symmetrical arrangement of the two comb-like slots to each other remained between a bridge 4 stand, which carries the individual prongs and connects sufficiently firmly with the base plate.
  • a single microslot having a width of 0.1 to 1 mm may be formed long enough to produce an open area of preferably 0.8 to 4% in the base plate, sufficient for the desired absorption effect.
  • This slot can be concentrated for example as a space-saving spiral in a region of the base plate.
  • FIG. 4 shows that with the micro-slots according to the invention the preferred for the sound absorption open area of 0.8 to 4% of the total area of an outside of the glass component can be almost arbitrarily focused on desired areas. This contributes significantly to reducing or completely avoiding stability problems, as inevitably caused by the uniform perforation. Since the micro-slots can be concentrated on a few small areas in the glass component, the risk of breakage is also limited to these small areas. The statics of the absorber component made of glass is not significantly impaired, so that even larger elements with sufficient inherent stability can be mounted on ceilings or walls.
  • the tines can be stabilized in the region of their free ends after cutting, for example with a silicone insert in the base slot against the opposite inner wall of the basic slot.
  • the stabilization can be completely absorbed by the base slot, so that no portion protrudes beyond the surface of the glass.
  • the sound absorption by micro-slots is decoupled from the mechanics of the supporting base plate made of glass.
  • the supporting, respectively the static function of the glass is separated from that of the sound absorbing surface portions.
  • the sound-absorbing function is preferably taken over by at least one micro-slot-carrying insert, which in a suitable recess of the supporting Base plate is arranged.
  • the thickness of the sound-absorbing insert can be decoupled from the static required thickness of the element.
  • This functional separation means that the elements constructed in this way are completely within the range of the approved glasses, for example tempered safety glass (ESG), laminated safety glass (VSG) from TVG (partially tempered glass) and also largely independent of the sizes.
  • the slots need not be evenly distributed over the element area.
  • glass in the statically required thicknesses with large holes, apertures or recesses which can be easily attached using known glass processing machines. In this way, even a subsequent biasing is possible.
  • suitable inserts are then attached to the sound absorption.
  • these inserts are mechanically decoupled from the load-bearing disc so that they are not static-bearing and their own strength does not play a significant role in the stability of the whole of the element.
  • the sound-absorbing inserts can be cut in from the inside or from the edge. The inserts are not deformed under load of the supporting base plate and do not break.
  • the supporting base plate also called carrier glass
  • a good acoustic absorptions can be achieved while the unprocessed part in the carrier glass can be kept as high as possible.
  • a Area of the inserts in the supporting glass base plate of less than 10%. This means that the slits are concentrated in an area fraction of less than 10% with respect to an entire first surface. This concentration is also realized in the directly slotted embodiments, that is to say in the case of the absorption elements without inserts, in preferred embodiments.
  • the flow resistance Rs is preferably in the range of 600-1200 Ns / m 3 .
  • the absorber components are formed in several pieces.
  • FIG. 5 shows a base plate 20 from which six circular disks 21 have been cut out.
  • the cut-out slices are provided with the micro-slits 25 in separate machining processes from the outer circumference, so that in turn a central web 22 is created, which carries the prongs 23 of the two combs.
  • These comb disks 24 are then inserted back into the base glass pane, respectively glued. They can also be used with a separate, not shown in the drawings holder releasably or firmly in the respective openings. The Rondelle incurred in creating the receiving openings can also be discarded. In the openings in this embodiment then comb discs from separate production are used.
  • multi-part glass blocks are used.
  • the base plates made of glass are provided as described above with larger holes / receiving openings, and equipped with prefabricated micro-slit glass inserts or inserts made of other materials.
  • these problems can be circumvented by subsequently inserting the absorption inserts elastically into a pre-processed disc of LSG or ESG. This is preferably done by means of an elastic bond to mechanical stresses that originate from the deformation of the disc, not to initiate the use, so that this may well have a low strength.
  • the active in the absorption inserts may consist in different preferred embodiments of the invention in different strengths of glass but also of other materials such as art glass, other plastics or metal.
  • the inserts are, as already mentioned, fitted with inserts, holders or adhesions into the receiving openings of the base glass plate.
  • these non-glass inserts can also be produced using abrasive water jet technology, they can also be produced using other known cutting or punching methods, in contrast to glass.
  • the cutting widths of the slots can be subsequently reduced by immersing the slotted workpiece (slotted insert or slotted base plate in an ultrasonic bath with a liquid plastic or lacquer, or the low-viscosity plastic or paint with another suitable method at least in the Slits are introduced, so that a thin layer of the plastic or paint adheres in particular on the inner surface of the slots and can be dried or cured there .
  • the gap width is reduced
  • plastic material on the surface of the components can mechanically or but easily removed by solvent, another advantage of this process is to be seen in the fact that the scattered light is significantly reduced on the rough inside of the cut surface of the slots by the plastic.
  • the slots in the overall component of the viewer are virtually no longer perceived.
  • Another way to improve the sound attenuation of the slot is to enlarge the inner surface by extending the cut. This can be achieved by using thicker elements, to a certain extent but also independently of the thickness of the slotted material, for example by the attachment of slits which are inclined from the surface normal. In the case of a 6 mm thick disk, this results in an effective slot height of 8.5 mm for a cut inclined at 45 ° from the normal surfaces.
  • the absorption can therefore be tuned to a certain frequency spectrum, or a spatial orientation of the maximum absorption can be achieved.
  • this method can be combined with the additive application of a further material on the inner surface of the cut edge.
  • the slots in the micro-slit inserts may also be arranged such that a circumferential closed edge remains, which is not broken by the individual slots.
  • the fastening that is, the insertion and possibly the gluing, such closed-edge inserts in the carrier discs designed easier than attaching the comb-like inserts.
  • the risk of injury and the risk of breakage is reduced to a minimum, since the holding force on the stability of the absorption insert can be adjusted. If someone hits or pushes against the insert, it will be released from the base plate before it breaks. This advantage is especially useful for inserts made of glass.
  • the absorption elements are mainly used for use as attachment elements or for installation in cassettes. They can be made of all common glass plates or glass blocks in thicknesses between 2 and 12 mm, as flat or curved elements, made of float glass, toughened safety glass and / or laminated safety glass.
  • the absorption elements When used as shells or attachment elements, the absorption elements are mounted at a distance of 10 to 350 mm, preferably at a distance of 20 to 150 mm, spaced from ceilings, walls, windows, doors and / or other sound-proof surfaces. In structural variants for creating cassettes, cylinders, cuboids and profiles, they are mounted in front of a correspondingly designed rear wall and can be used, for example, as free-standing acoustic elements or room dividers.
  • the inventive absorption elements leave the manufacturer a maximum of creative freedom.
  • Both the slot shape and arrangement, as well as the shape and design of the microslice-bearing inserts can be varied within wide ranges.
  • the simple slots or primary slots may be linear, curved, angled, spiral, serrated and cut in many other shapes.
  • the micro slots with secondary Slits can be star-shaped and almost arbitrarily branched.
  • the receiving openings and corresponding to the microslot-carrying inserts can take on the round shape and oval, square, rectangular, polygonal, star-shaped and many other outlines.
  • the open area formed by the micro-slots makes up to 18%, preferably from 0.8 to 7%, and particularly preferably 0.8 to 3%, based on a first surface comprising the surfaces of the base plate and the inserts in the inventive absorbent elements.
  • the slot widths are optimized for optimum absorption performance. As previously mentioned, in certain embodiments, it has been found advantageous to combine micro-slots of various widths or to mount micro-slots of varying widths.

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  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Electromagnetism (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Multimedia (AREA)
  • Joining Of Glass To Other Materials (AREA)
  • Surgical Instruments (AREA)
  • Transducers For Ultrasonic Waves (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)
  • Building Environments (AREA)
EP07405023A 2007-01-29 2007-01-29 Eléments acoustiques Not-in-force EP1950357B1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DE502007004772T DE502007004772D1 (de) 2007-01-29 2007-01-29 Akustikelemente
EP07405023A EP1950357B1 (fr) 2007-01-29 2007-01-29 Eléments acoustiques
AT07405023T ATE478208T1 (de) 2007-01-29 2007-01-29 Akustikelemente
DK07405023.8T DK1950357T3 (da) 2007-01-29 2007-01-29 Akustikelementer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP07405023A EP1950357B1 (fr) 2007-01-29 2007-01-29 Eléments acoustiques

Publications (2)

Publication Number Publication Date
EP1950357A1 true EP1950357A1 (fr) 2008-07-30
EP1950357B1 EP1950357B1 (fr) 2010-08-18

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ID=38984141

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EP07405023A Not-in-force EP1950357B1 (fr) 2007-01-29 2007-01-29 Eléments acoustiques

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EP (1) EP1950357B1 (fr)
AT (1) ATE478208T1 (fr)
DE (1) DE502007004772D1 (fr)
DK (1) DK1950357T3 (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2015291A1 (fr) 2007-07-13 2009-01-14 Akustik & Raum AG Eléments acoustiques
EP2540926A1 (fr) 2011-07-01 2013-01-02 Akusik & Innovation GmbH Elément à absorption acoustique et son procédé de fabrication
WO2013124069A3 (fr) * 2012-02-23 2013-11-14 Noisetech Hb Absorbant phonique
CN105719638A (zh) * 2014-12-04 2016-06-29 北京市劳动保护科学研究所 复合共振吸声结构
RU2655643C2 (ru) * 2015-07-27 2018-05-29 Мария Михайловна Стареева Штучный звукопоглотитель с винтовыми звукопоглощающими элементами
CN110573470A (zh) * 2017-04-26 2019-12-13 康宁股份有限公司 微穿孔玻璃层叠体及其制造方法
LU101991A1 (fr) * 2019-08-23 2021-02-23 Van Eycken Metal Construction Bvba Écrans antibruit et méthode de fabrication
US20220148550A1 (en) * 2019-03-04 2022-05-12 Corning Incorporated Micro-perforated panel systems, applications, and methods of making micro-perforated panel systems

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11536174B2 (en) 2017-07-20 2022-12-27 President And Fellows Of Harvard College Acoustic damper for gas turbine combustors with orthogonal slots

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9116233U1 (de) 1991-04-10 1992-06-17 VEGLA Vereinigte Glaswerke GmbH, 5100 Aachen Schallabsorbierende Verglasung
DE4312885A1 (de) * 1993-04-20 1994-10-27 Fraunhofer Ges Forschung Unterdecke
EP1110686A2 (fr) * 1999-12-23 2001-06-27 Peter Lisec Procédé et dispositif pour couper des feuilles de verre avec un jet d eau
WO2006101404A2 (fr) 2005-03-23 2006-09-28 Kjell Emil Eriksen Systeme pour utiliser l'energie thermique
WO2006101403A1 (fr) * 2005-03-23 2006-09-28 Deamp As Absorbant acoustique

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9116233U1 (de) 1991-04-10 1992-06-17 VEGLA Vereinigte Glaswerke GmbH, 5100 Aachen Schallabsorbierende Verglasung
DE4312885A1 (de) * 1993-04-20 1994-10-27 Fraunhofer Ges Forschung Unterdecke
EP1110686A2 (fr) * 1999-12-23 2001-06-27 Peter Lisec Procédé et dispositif pour couper des feuilles de verre avec un jet d eau
WO2006101404A2 (fr) 2005-03-23 2006-09-28 Kjell Emil Eriksen Systeme pour utiliser l'energie thermique
WO2006101403A1 (fr) * 2005-03-23 2006-09-28 Deamp As Absorbant acoustique

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
H V FUCHS; X ZHA: "Acrylic-glass Sound Absorbers in the Plenum of the Deutscher Bundestag", APPLIED ACOUSTICS, vol. 51, no. 2, 1997 - 1997, ELSEVIER SCIENCE LTD, pages 211 - 217, XP002467713 *

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2015291A1 (fr) 2007-07-13 2009-01-14 Akustik & Raum AG Eléments acoustiques
EP2540926A1 (fr) 2011-07-01 2013-01-02 Akusik & Innovation GmbH Elément à absorption acoustique et son procédé de fabrication
WO2013124069A3 (fr) * 2012-02-23 2013-11-14 Noisetech Hb Absorbant phonique
CN105719638A (zh) * 2014-12-04 2016-06-29 北京市劳动保护科学研究所 复合共振吸声结构
RU2655643C2 (ru) * 2015-07-27 2018-05-29 Мария Михайловна Стареева Штучный звукопоглотитель с винтовыми звукопоглощающими элементами
CN110573470A (zh) * 2017-04-26 2019-12-13 康宁股份有限公司 微穿孔玻璃层叠体及其制造方法
US11254087B2 (en) * 2017-04-26 2022-02-22 Corning Incorporated Micro-perforated glass laminates and methods of making the same
US20220148550A1 (en) * 2019-03-04 2022-05-12 Corning Incorporated Micro-perforated panel systems, applications, and methods of making micro-perforated panel systems
LU101991A1 (fr) * 2019-08-23 2021-02-23 Van Eycken Metal Construction Bvba Écrans antibruit et méthode de fabrication
BE1027517B1 (nl) * 2019-08-23 2021-03-23 Van Eycken Metal Construction Bvba Geluidsschermen en methode om deze te maken
NL2026321A (nl) * 2019-08-23 2021-03-24 Van Eycken Metal Construction Bvba Geluidsschermen en methode om deze te maken

Also Published As

Publication number Publication date
ATE478208T1 (de) 2010-09-15
EP1950357B1 (fr) 2010-08-18
DE502007004772D1 (de) 2010-09-30
DK1950357T3 (da) 2010-11-01

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