EP4042408A1 - Dispositif d'absorption acoustique - Google Patents
Dispositif d'absorption acoustiqueInfo
- Publication number
- EP4042408A1 EP4042408A1 EP20792491.1A EP20792491A EP4042408A1 EP 4042408 A1 EP4042408 A1 EP 4042408A1 EP 20792491 A EP20792491 A EP 20792491A EP 4042408 A1 EP4042408 A1 EP 4042408A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- materials
- group
- honeycomb structure
- cells
- shapes
- 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- Withdrawn
Links
- 238000010521 absorption reaction Methods 0.000 title claims abstract description 27
- 239000000463 material Substances 0.000 claims abstract description 30
- 239000000843 powder Substances 0.000 claims abstract description 9
- 239000011344 liquid material Substances 0.000 claims abstract description 5
- 239000002131 composite material Substances 0.000 claims description 8
- 239000002184 metal Substances 0.000 claims description 8
- 229910052751 metal Inorganic materials 0.000 claims description 8
- 235000011837 pasties Nutrition 0.000 claims description 8
- 239000004576 sand Substances 0.000 claims description 8
- 239000000919 ceramic Substances 0.000 claims description 5
- 239000000835 fiber Substances 0.000 claims description 5
- 230000005484 gravity Effects 0.000 claims description 5
- 229910001092 metal group alloy Inorganic materials 0.000 claims description 5
- 239000011800 void material Substances 0.000 claims description 4
- 239000002023 wood Substances 0.000 claims description 4
- 150000002739 metals Chemical class 0.000 claims description 3
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 2
- 239000004917 carbon fiber Substances 0.000 claims description 2
- 239000003365 glass fiber Substances 0.000 claims description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 2
- 239000011159 matrix material Substances 0.000 claims description 2
- 239000011707 mineral Substances 0.000 claims description 2
- 239000003822 epoxy resin Substances 0.000 description 5
- 229920000647 polyepoxide Polymers 0.000 description 5
- 239000004744 fabric Substances 0.000 description 4
- 239000011521 glass Substances 0.000 description 3
- 239000012814 acoustic material Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000011152 fibreglass Substances 0.000 description 2
- 210000000056 organ Anatomy 0.000 description 2
- 239000000565 sealant Substances 0.000 description 2
- 239000004593 Epoxy Substances 0.000 description 1
- 229920000784 Nomex Polymers 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000006082 mold release agent Substances 0.000 description 1
- 239000004763 nomex Substances 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 239000000123 paper Substances 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B21/00—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board
- B32B21/04—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board comprising wood as the main or only constituent of a layer, which is next to another layer of the same or of a different material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B29/00—Layered products comprising a layer of paper or cardboard
- B32B29/002—Layered products comprising a layer of paper or cardboard as the main or only constituent of a layer, which is next to another layer of the same or of a different material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
- B32B3/10—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a discontinuous layer, i.e. formed of separate pieces of material
- B32B3/12—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a discontinuous layer, i.e. formed of separate pieces of material characterised by a layer of regularly- arranged cells, e.g. a honeycomb structure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B9/00—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
- B32B9/005—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising one layer of ceramic material, e.g. porcelain, ceramic tile
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/10—Properties of the layers or laminate having particular acoustical properties
- B32B2307/102—Insulating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2419/00—Buildings or parts thereof
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
- H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only
- H04R1/28—Transducer mountings or enclosures modified by provision of mechanical or acoustic impedances, e.g. resonator, damping means
- H04R1/2803—Transducer mountings or enclosures modified by provision of mechanical or acoustic impedances, e.g. resonator, damping means for loudspeaker transducers
Definitions
- the present invention relates to the field of absorption of acoustic waves.
- the objective of the present invention is thus to provide an acoustic absorption device which notably finds its application in the field of high-fidelity, and which makes it possible to overcome the aforementioned drawbacks.
- an acoustic absorption device comprising a honeycomb structure sandwiched between two outer skins, the cells of this structure being partially filled. vacuum and partly of a material selected from the group consisting of powdery materials, pasty materials and liquid materials.
- this particular structure of the acoustic vibration device allows, thanks to the combination of the vacuum and the material partially filling the cells, to obtain exceptional characteristics of absorption of acoustic vibrations.
- the timbres whether high, medium or low, are much clearer ; the stereo fields are much wider; the musical planes are perfectly staged; the different desks are placed with precision, which makes it much easier to follow them; the silences are of high quality; the notes are held and go out wisely; in short, the richness of the details obtained thanks to the device according to the invention makes it possible to listen to music as if the musicians were present in the listening room.
- said pulverulent material is chosen from the group comprising sand, alumina powder, mineral powders, metal powders, ceramic powders: use of these very common materials has proved particularly satisfactory; said material occupies between 50% and 99% of the volume of said cells, and preferably between 80% and 90% of this volume: this filling rate has been found to be optimal in use; said honeycomb structure is of the type honeycomb structure: this type of structure is easily available commercially and is sold under the trademark NOMEX ®; this device comprises a decorative belt: this decorative belt essentially has an aesthetic function, and makes it possible to protect the honeycomb structure which is located between the two outer skins; said honeycomb structure and / or said outer skins and / or said decorative belt is formed from a material selected from the group comprising cardboard, wood, polymeric materials, metals or metal alloys, ceramics, composite materials: experiments were carried out with all of these materials, and all have made it possible to obtain excellent results, with however a preference for composite materials
- the present invention also relates to a vibration absorption system for a high-fidelity chain, comprising at least three devices in accordance with the above forming feet, and at least one device in accordance with the above forming a table, balls being interposed between said legs and said table.
- Such an arrangement makes it possible to absorb with even more efficiency the acoustic vibrations emitted or received by the device placed on the table formed with the device according to the invention.
- the present invention also relates to an acoustic enclosure formed at least in part from a device in accordance with the above: such an enclosure exhibits a very marked improvement in the quality of the sound emitted.
- FIG.l shows a perspective view partially cut away of a sound absorption device according to the invention
- FIG.2 shows a sectional view of this device
- FIG.3 shows a sectional view of an improved version of this device, this section being taken substantially in the vicinity of the center of gravity of this device;
- FIG.4 shows, schematically, a high-fidelity device placed on a piece of furniture by means of an acoustic vibration absorption system according to the invention.
- identical or similar references represent identical or similar organs or sets of organs.
- the sound absorption device comprises a honeycomb structure 1, for example honeycomb, sandwiched between two outer skins , respectively lower B in FIG. 1, and upper 5 in this same figure.
- the honeycomb structure 1 thus forms a sandwich with the two outer skins 3, 5.
- the assembly thus obtained is preferably provided at its periphery with a decorative belt 7.
- the cells 9 of the honeycomb structure 1 are filled in part with a pulverulent or pasty or liquid material 11, and in part with a vacuum 13.
- the pulverulent or pasty or liquid material 11 which can be for example sand, remains free to move inside each cell 9.
- the volume occupied by this material represents from 50% to 99% of the volume of each cell 9, but it has been observed through various tests that a filling rate with this material located between 80% and 90% was particularly effective with respect to the absorption of acoustic vibrations.
- each cell may have a height of the order of 24 mm, 21 mm being filled with sand and 3 mm being filled with void.
- the upper outer skin 5 as well as the cells located in this area interrupt, thus forming a cavity which can be filled with a pasty acoustic material 15.
- the cavity filled with this material is closed by a sticky tape or the like 17.
- this acoustic material 15 retains its pasty texture.
- Such a material is commercially available, for example under the name Green Glue Noise Proofing Sealant.
- the lower B is upper outer skins 5 may be formed from a composite material of the epoxy resin and fiberglass fabric type.
- the honeycomb structure 1 may be a structure of the metal honeycomb type.
- the honeycomb structure 1, the skins 3, 5, and the belt 7 can be formed in particular in any one of the materials among cardboard, wood, polymeric materials, metals or metal alloys, ceramics, glass, composite materials.
- the method of manufacturing the sound absorption device according to the invention is as follows.
- the fiberglass fabrics or the like are then cut to the desired shape, typically taking three plies of fabric representing a total thickness of the order of 0.6 mm for the lower skin, and two plies typically representing a total thickness of 0.4mm for the upper skin.
- the three folds of the lower skin are then impregnated with epoxy resin on one of the molds, and the two folds of the upper skin with epoxy resin on the other mold.
- honeycomb honeycomb structure is then cut to the dimensions of the mold in which the three folds of the lower skin 3 are located, then it is placed inside this mold, the assembly thus obtained is placed under vacuum, and the temperature is raised to approximately 50 ° C. so as to allow the polymerization of the epoxy resin, and therefore the hardening of the lower outer skin 3 and its bonding to the honeycomb structure 1.
- the molds are dismantled, and if necessary, the assembly obtained is cut so that it fits perfectly to its final destination.
- the lower outer skin 3 is cut, for example by means of a hole saw, and we removes the walls of the alveoli of the honeycomb to create a cavity.
- a sound absorption device is obtained, the cells of which are filled with void and sand, this void being located not only above the sand, but also between the grains which form this sand.
- the sound absorption device according to the invention can advantageously be cut into plates on which can be placed the various elements of a high-fidelity chain, such as the playback board, the preamplifier, the amplifier and the loudspeakers.
- This sound absorption system comprises a sound absorption device according to the invention forming a support table 27, this device itself being placed on feet 29 themselves formed by sound absorption devices in accordance with the invention.
- the support table 27 rests on the feet 29 by means of balls 31, typically one per foot.
- This ball can be metallic or glass, and of different diameters - these different materials and diameters can have a significant influence on the accuracy of the sound message.
- the feet 29 rest on the cabinet 25 by means of hemispherical glass cabochons 33, typically three cabochons per foot.
- the device according to the invention can find many applications.
- the device according to the invention can have other applications in other fields, such as the absorption of acoustic vibrations of machines, vehicles, industrial computer equipment (such as servers) or of electrical power or control cabinets.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
- Building Environments (AREA)
- Vehicle Interior And Exterior Ornaments, Soundproofing, And Insulation (AREA)
- Laminated Bodies (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1911193A FR3101995B1 (fr) | 2019-10-09 | 2019-10-09 | Dispositif d’absorption acoustique |
PCT/IB2020/059516 WO2021070139A1 (fr) | 2019-10-09 | 2020-10-09 | Dispositif d'absorption acoustique |
Publications (1)
Publication Number | Publication Date |
---|---|
EP4042408A1 true EP4042408A1 (fr) | 2022-08-17 |
Family
ID=69104744
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20792491.1A Withdrawn EP4042408A1 (fr) | 2019-10-09 | 2020-10-09 | Dispositif d'absorption acoustique |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP4042408A1 (fr) |
FR (1) | FR3101995B1 (fr) |
WO (1) | WO2021070139A1 (fr) |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2695669B1 (fr) * | 1992-09-17 | 1998-11-06 | Db Systemes Sarl | Procede d'isolation acoustique pour cloisons composites. |
DE19709620A1 (de) * | 1997-03-08 | 1998-09-24 | Jun Karl Limberger | Schalldämmendes Flächenbauelement |
WO2013012108A1 (fr) * | 2011-07-19 | 2013-01-24 | Lee Hyung Ho | Matériau insonorisant de construction contenant du charbon et porte insonorisée |
SG193647A1 (en) * | 2012-03-12 | 2013-10-30 | Electro Acoustics Res 1999 Pte Ltd | Improved speaker enclosure |
RU2544690C1 (ru) * | 2013-09-19 | 2015-03-20 | Открытое акционерное общество "Обнинское научно-производственное предприятие "Технология" | Опорный узел трехслойной панели и способ сборки трехслойной панели с опорными узлами |
US10837368B2 (en) * | 2017-02-24 | 2020-11-17 | Mra Systems, Llc | Acoustic liner and method of forming an acoustic liner |
-
2019
- 2019-10-09 FR FR1911193A patent/FR3101995B1/fr active Active
-
2020
- 2020-10-09 EP EP20792491.1A patent/EP4042408A1/fr not_active Withdrawn
- 2020-10-09 WO PCT/IB2020/059516 patent/WO2021070139A1/fr unknown
Also Published As
Publication number | Publication date |
---|---|
WO2021070139A1 (fr) | 2021-04-15 |
FR3101995A1 (fr) | 2021-04-16 |
FR3101995B1 (fr) | 2023-10-13 |
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