EP0682335B1 - Lamellenabsorber - Google Patents
Lamellenabsorber Download PDFInfo
- Publication number
- EP0682335B1 EP0682335B1 EP95106848A EP95106848A EP0682335B1 EP 0682335 B1 EP0682335 B1 EP 0682335B1 EP 95106848 A EP95106848 A EP 95106848A EP 95106848 A EP95106848 A EP 95106848A EP 0682335 B1 EP0682335 B1 EP 0682335B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- arrangement
- laminations
- slats
- sound waves
- free space
- 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 - Lifetime
Links
Images
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
-
- 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
- G10K2210/00—Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
- G10K2210/30—Means
- G10K2210/321—Physical
- G10K2210/3214—Architectures, e.g. special constructional features or arrangements of features
-
- 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
- G10K2210/00—Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
- G10K2210/30—Means
- G10K2210/321—Physical
- G10K2210/3227—Resonators
Definitions
- the present invention relates to a device for damping spreading in a gaseous medium in particular Sound waves according to the preamble of claim 1.
- the transmission or generation in Area of technology occurring noise between structure-borne noise distinguish between airborne sound and structure-borne noise, for example due to imbalance in rotating machine parts arises, which therefore occurs with almost every translational or rotary Movement is caused by pathogens and is therefore almost inevitable.
- These vibrations are on the periphery of the internal combustion engine, for example, or for example a turbine wheel or fan in the form of Sound waves in the surrounding devices Air range passed.
- foams or fibrous materials such as mineral wool mats or felt mats known as the swallowing substances Should absorb sound energy.
- the insulating facilities also mentioned above are, for example, resonating dampers, that is to say so-called Impedance silencers in the form of resonators, which do not absorb the sound waves, but reflect them, resulting in the need for these dampers be matched to the respective frequencies of the sound waves must and therefore have the disadvantage that they on the respective Use tuned frequencies bound to the intended use and therefore these dampers cannot be used universally.
- Such resonators are known for example from DE-A-2 725 186 and EP-A-0 337 077.
- Areas of application of the absorbent dampers for example in the form of mineral wool mats or felt mats are often the areas of air conditioning where such arrangements can be provided in the air duct, so that the fan noises formed in these arrangements, Flow noise in the sewer network, at corners, deflections, Cross-sectional reductions, grids or simply by high Air velocities occurring noise absorbed can be.
- the present invention is therefore Eliminating the disadvantages described the task to create a device for damping airborne sound which is extremely good damping achievable and with the moreover an inexpensive arrangement is created which is also adaptable to a variety of uses.
- a device for damping is in itself a sound wave propagating in particular gaseous medium provided that a plurality of vibratable slats as a vibrating body having.
- the invention is therefore based on the fundamental idea to provide a variety of vibratable individual bodies which the sound waves on their way in the gaseous Medium and thus the individual vibrations Stimulate the vibrating body to a swinging movement, whereby at least part of the energy inherent in the sound waves in kinetic energy of the individually vibrating vibrating bodies is converted, which is then ultimately converted into heat is that in the individually vibratable Vibrating body creates internal friction or this too Rub each vibrating body against each other or a mixed state these two states of friction arise.
- the vibrating body Slats are parallel to each other according to an advantageous development are arranged adjacent to each other. This arrangement supports the already mentioned friction of the individual vibrating bodies, that is, the slats together.
- the slats are elongated formed such that their longitudinal extension is greater or at least is equal to its width, which creates a overall there is a large possible friction surface of the individual lamellae.
- the slats can be integrally formed in such a way. that there is a one-piece arrangement with a variety of results largely individually vibratable individual lamellae.
- an easy to manufacture Slat arrangement is provided, for example have a rectangular configuration in a plan view can, the individual lamellae accordingly being elongated
- the outer circumference of the lamella arrangement are connected to one another and swinging freely in the area of the interior of the rectangular arrangement are provided so that they extend along the thereby formed Can rub the long sides of the individual lamellas together.
- the Slats are arranged in a housing arrangement such that between the top and / or bottom of the housing arrangement and a clear space is provided for the slats, within an oscillatory movement of the slats can be carried out is.
- the slat damping medium there can be space between the fins and the top and / or bottom of the housing arrangement a particularly gaseous and the vibratory motion the slat damping medium may be provided.
- This medium which can be air, for example, fulfills the stated task, namely the oscillatory movement of the Dampen slats and flows through during the vibration movement of the slats due to the slats lying against each other in the case of vibrations, the gap between the slats is released, causing an intense flow movement of the air molecules takes place in the spaces thus formed such that the energy of the Sound waves due to the movement of the slats in kinetic Energy and through the flow movement of the air molecules as well the associated friction is ultimately converted into heat and dissipating with it.
- the free space can be a clear height of preferably in the range of greater than about 5 mm exhibit. This ensures that on the one hand the appropriately trained slats during their oscillatory movement not on the top or bottom of the housing arrangement nudge and that one acting as a cushion is sufficient dimensioned air space is formed in the free space.
- the individual slats preferably have a width from about 5 to 10 mm and have one in a cross section of the slats considered height of about 1.5 to 2 mm. This training also makes it possible to but training associated with a certain rigidity of the individual slats created.
- a lamella arrangement is provided within the housing arrangement and on this lamella arrangement in turn a second lamella arrangement is arranged, which largely rests on this, so that there is a crossing angle of 90 ° between each Slats of the individual slat arrangement results. It is however also any intermediate form of the crossing angle possible between individual lamella layers, so that for example also three slat arrangements are provided one above the other can be, with the individual slats of the respective Cross the lamella arrangement at an angle of 90 ° to each other.
- the device according to the invention a plurality of each preferably has one-piece lamella arrangements, which each have individually vibratable slats such that the lamella arrangements form an overall arrangement each largely provided adjacent to each other are.
- the side by side according to the invention Devices has such a large area vibration damping slats is created by entirely simply the overall arrangement of a multitude of substructures consists.
- the device has an outer contour, each for any purpose is customizable. It means that for example a device in plan view rectangular can be created, or one of a hollow cylindrical Arrangement corresponding damping device that enclose an electric motor, for example in motor vehicle construction can, or as a circular segment-shaped training a portion of an alternator arranged in the engine compartment.
- the slats from one Plastic are made in an injection molding process.
- a so-called recyclate can also be used, for example be used, so that a very inexpensive Arrangement can be created.
- a method for Damping itself in a particularly gaseous medium propagating sound waves is created in which a variety individually vibrating vibrating body for energy dissipation are provided such that the sound waves vibrating bodies vibrate through the sound waves Transferred energy through internal friction of the vibrating body and / or by friction of the medium on the vibrating bodies and / or dissipate due to internal friction of the medium.
- the invention makes it extremely economical Device for damping airborne sound created Place the usual sound barriers with fiber or Foams are provided, slats for noise reduction exhibit.
- this arrangement offers also the benefits of recyclability which preferably slats made of plastic and the advantage dirt resistance, for example to water, Dust and oil without reducing the noise reduction properties is to be feared.
- the one lying parallel to each other Slats can be made of a plastic in the Injection molding processes are made.
- the slats can on Provide a circumference with a frame and as a compact structure in the Inside of a housing arrangement, for example an acoustic hood be attached. Such an arrangement can for example in the field of motor vehicle construction between the Trunk of a passenger car and the passenger compartment in the Area of the parcel shelf.
- the sound waves generated by the noise source hit the surface of the absorber and thereby excite the slats to swing. This creates an intense friction of the Slats and the air molecules penetrating them, whereby there is a conversion of sound energy into heat and also kinetic The energy of the lamellae results in the clear Reduction of the sound level from radiated into the free space Sound waves.
- the device in the illustrated embodiment a lamella arrangement 1, a housing arrangement 2 and a free space 3.
- the lamella arrangement is in the form of a rectangular arrangement in plan view trained a variety of parallel and - like Fig. 3 shows - arranged adjacent slats 4.
- the lamella arrangement arranged in a trough-shaped housing 2 such that above and below the slat arrangement in Housing 2 a free space 3 is provided.
- the lamella arrangement 1 has a plurality of along its individual lamellae running parallel to each other on the long side 4 on that in the area of the respective opposite Ends of the individual lamellae 4 are formed in one piece, so that a lamella arrangement 1 is created, which is simply in the housing 2 can be inserted or molded.
- the arrangement is such that on the housing 2 in the area of the support point of the lamella arrangement 1 a paragraph 5 is arranged in the housing 2, on which the lamella arrangement 1 can be placed.
- the lamella arrangement 1 for example, integrally formed in an injection molding process can be and then in the box-shaped housing 2 of can be used above such that the outer circumference of the Lamella arrangement 1 on paragraph 5 comes to rest and below the lamella arrangement 1 in the housing 2 has a free space 3 remains with a gaseous medium, for example Air can be filled.
- the individual lamellas are 4 in Vibrates and vibrates in their respective longitudinal directions, so that due to the between the individual slats 4 formed and can be seen from Fig. 3 Spaces between the individual lamellas result in 4 areas, through which the air in the free space 3 flows can be such that they on the long sides of the individual lamellae 4 flows past, so that the transmitted by the sound waves Energy into a kinetic energy of the individual lamellae 4 and an internal friction of the air molecules in the free space 3 and a Friction of the air molecules from the free space 3 on the long sides the individual lamellae 4 is converted.
- the sound waves transferred energy is dissipated.
- FIG. 4 shows the lamella arrangement 1 in a second embodiment, which results from the fact that the Drawing apparent slat arrangement a second slat arrangement 1 is applied from above, so that the Fig. 4 visible and only for the sake of clarity arrangement shown results.
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
- Apparatuses For Generation Of Mechanical Vibrations (AREA)
- Building Environments (AREA)
- Measuring Temperature Or Quantity Of Heat (AREA)
- Diaphragms For Electromechanical Transducers (AREA)
- Vibration Prevention Devices (AREA)
Description
- Fig. 1
- schematisch eine Anordnung gemäß der Erfindung im Schnitt und
- Fig. 2
- in Draufsicht sowie
- Fig. 3
- in vergrößerter Darstellung einen Schnitt "X" nach Fig. 1 und
- Fig. 4
- in Draufsicht eine Anordnung gemäß der Erfindung nach einer zweiten Ausführungsform.
Claims (11)
- Vorrichtung zum Dämpfen von Schallwellen, insbesondere von Luftschallwellen,
gekennzeichnet durcheine Vielzahl schwingfähiger Lamellen (4) als Schwingkörper. - Vorrichtung nach Anspruch 1,
dadurch gekennzeichnet, daß die Lamellenparallel zueinander ausgerichtet und dicht nebeneinanderliegend angeordnet sind. - Vorrichtung nach einem der Ansprüche 1 oder 2,
dadurch gekennzeichnet, daß die Lamellenlanggestreckt und schmal konfiguriert sind. - Vorrichtung nach einem der Ansprüche 1 bis 3,
gekennzeichnet durcheinen mit der Vielzahl der Lamellen (4) einstückig ausgebildeten Lamellenträger (1). - Vorrichtung nach einem der Ansprüche 1 bis 4,
gekennzeichnet durchein Gehäuse (2) mit einem lichten Freiraum (3), in dem die Lamellen (4) schwingen können. - Vorrichtung nach Anspruch 5,
gekennzeichnet durchein Dämpfungsmedium im Freiraum (3). - Vorrichtung nach Anspruch 6,
gekennzeichnet durchLuft als Dämpfungsmedium. - Vorrichtung nach einem der Ansprüche 5 bis 7,
gekennzeichnet durcheine lichte Höhe des Freiraumes (3) von größer als ungefähr 5 mm. - Vorrichtung nach einem der Ansprüche 1 bis 8,
dadurch gekennzeichnet, daß dieLamellen (4) eine Länge im Bereich von etwa 5 mm bis 10 mm und eine Breite im Bereich von etwa 1,5 mm bis 2 mm aufweisen. - Vorrichtung nach einem der Ansprüche 1 bis 9,
gekennzeichnet durchmindestens zwei jeweils einstückig ausgebildete Lamellenträger (1) mit Lamellen (4), die dicht übereinanderliegend angeordnet und einander überkreuzend ausgerichtet sind. - Vorrichtung nach einem der Ansprüche 1 bis 10,
dadurch gekennzeichnet, daß dieLamellen (4) aus Kunststoff durch Spritzgiessen hergestellt sind.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4416361A DE4416361A1 (de) | 1994-05-09 | 1994-05-09 | Lamellenabsorber |
DE4416361 | 1994-05-09 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0682335A2 EP0682335A2 (de) | 1995-11-15 |
EP0682335A3 EP0682335A3 (de) | 1998-01-07 |
EP0682335B1 true EP0682335B1 (de) | 2001-12-12 |
Family
ID=6517701
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP95106848A Expired - Lifetime EP0682335B1 (de) | 1994-05-09 | 1995-05-05 | Lamellenabsorber |
Country Status (6)
Country | Link |
---|---|
US (1) | US5719359A (de) |
EP (1) | EP0682335B1 (de) |
KR (1) | KR950034050A (de) |
DE (2) | DE4416361A1 (de) |
ES (1) | ES2169738T3 (de) |
MX (1) | MX9501846A (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6983820B2 (en) | 2001-09-07 | 2006-01-10 | Avon Polymer Products Limited | Noise and vibration suppressors |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NO322685B1 (no) | 2005-03-23 | 2006-11-27 | Deamp As | Plateelement |
US8235169B2 (en) * | 2008-08-19 | 2012-08-07 | Siemens Aktiengesellschaft | Noise-reducing device and method for reducing noise |
US10149044B2 (en) * | 2014-07-21 | 2018-12-04 | Nokia Technologies Oy | Vibration damping structure for audio device |
US10657947B2 (en) * | 2017-08-10 | 2020-05-19 | Zin Technologies, Inc. | Integrated broadband acoustic attenuator |
JP7006116B2 (ja) * | 2017-10-16 | 2022-02-10 | セイコーエプソン株式会社 | 吸音器およびプロジェクター |
CN113302087B (zh) * | 2019-01-11 | 2024-04-09 | 富士胶片株式会社 | 电动车用消音部件 |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2534137A (en) * | 1946-03-25 | 1950-12-12 | M B Mfg Company Inc | Vibration isolator pad |
US2989136A (en) * | 1959-04-14 | 1961-06-20 | Wohlberg George | Sound attenuation |
US4141433A (en) * | 1976-06-04 | 1979-02-27 | Lord Corporation | Sound absorbing structure |
GB2024380A (en) * | 1978-04-29 | 1980-01-09 | Rolls Royce | Acoustic linings for fluid flow ducts |
DE3643481A1 (de) * | 1986-05-14 | 1987-11-19 | Pape Hans | Schallschluckbeschichtung einer akustikwand oder akustikdecke |
US4821841A (en) * | 1987-06-16 | 1989-04-18 | Bruce Woodward | Sound absorbing structures |
US4842097A (en) * | 1987-06-16 | 1989-06-27 | Woodward Bruce | Sound absorbing structure |
DE3812224A1 (de) * | 1988-04-13 | 1989-10-26 | Messerschmitt Boelkow Blohm | Vorrichtung zur daempfung von luft- und koerperschallschwingungen |
ES2038957T1 (es) * | 1991-04-25 | 1993-08-16 | Hutchinson | Material de proteccion acustica y dispositivo que incorpora dicho material. |
JP3076945B2 (ja) * | 1993-06-15 | 2000-08-14 | 松下電器産業株式会社 | 吸音装置 |
-
1994
- 1994-05-09 DE DE4416361A patent/DE4416361A1/de not_active Withdrawn
-
1995
- 1995-04-19 MX MX9501846A patent/MX9501846A/es not_active Application Discontinuation
- 1995-05-05 DE DE59509926T patent/DE59509926D1/de not_active Expired - Fee Related
- 1995-05-05 EP EP95106848A patent/EP0682335B1/de not_active Expired - Lifetime
- 1995-05-05 ES ES95106848T patent/ES2169738T3/es not_active Expired - Lifetime
- 1995-05-08 KR KR1019950011117A patent/KR950034050A/ko not_active Application Discontinuation
- 1995-05-09 US US08/437,770 patent/US5719359A/en not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
Noise and vibration:",1982,S.483,John Wiley & Sons * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6983820B2 (en) | 2001-09-07 | 2006-01-10 | Avon Polymer Products Limited | Noise and vibration suppressors |
Also Published As
Publication number | Publication date |
---|---|
DE59509926D1 (de) | 2002-01-24 |
ES2169738T3 (es) | 2002-07-16 |
KR950034050A (ko) | 1995-12-26 |
US5719359A (en) | 1998-02-17 |
DE4416361A1 (de) | 1995-11-16 |
MX9501846A (es) | 1997-02-28 |
EP0682335A2 (de) | 1995-11-15 |
EP0682335A3 (de) | 1998-01-07 |
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