EP3392423A1 - Device for passive influencing of the acoustics of a room - Google Patents
Device for passive influencing of the acoustics of a room Download PDFInfo
- Publication number
- EP3392423A1 EP3392423A1 EP17167036.7A EP17167036A EP3392423A1 EP 3392423 A1 EP3392423 A1 EP 3392423A1 EP 17167036 A EP17167036 A EP 17167036A EP 3392423 A1 EP3392423 A1 EP 3392423A1
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- European Patent Office
- Prior art keywords
- cover
- flow resistance
- range
- needled
- thermally bonded
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- 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.)
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- 239000000835 fiber Substances 0.000 claims abstract description 27
- 229920000728 polyester Polymers 0.000 claims abstract description 19
- 239000002184 metal Substances 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 6
- 239000000725 suspension Substances 0.000 claims description 4
- 238000004026 adhesive bonding Methods 0.000 claims 1
- 239000011888 foil Substances 0.000 claims 1
- 230000002093 peripheral effect Effects 0.000 claims 1
- 239000006096 absorbing agent Substances 0.000 description 20
- 239000011521 glass Substances 0.000 description 8
- 238000010521 absorption reaction Methods 0.000 description 4
- 238000005253 cladding Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000013016 damping Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000002835 absorbance Methods 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
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- 239000002131 composite material Substances 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- 230000003534 oscillatory effect Effects 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Images
Classifications
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- 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
- E04B1/8404—Sound-absorbing elements block-shaped
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- 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
-
- 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
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- 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
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- 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
- E04B2001/8423—Tray or frame type panels or blocks, with or without acoustical filling
- E04B2001/8452—Tray or frame type panels or blocks, with or without acoustical filling with peripheral frame members
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- 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
- E04B2001/8461—Solid slabs or blocks layered
- E04B2001/8466—Solid slabs or blocks layered with an intermediate layer formed of lines or dots of elastic material
-
- 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
- E04B2001/848—Solid slabs or blocks with acoustical cavities, with or without acoustical filling the cavities opening onto the face of the element
- E04B2001/8485—Solid slabs or blocks with acoustical cavities, with or without acoustical filling the cavities opening onto the face of the element the opening being restricted, e.g. forming Helmoltz resonators
-
- 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
- E04B2001/848—Solid slabs or blocks with acoustical cavities, with or without acoustical filling the cavities opening onto the face of the element
- E04B2001/849—Groove or slot type openings
Definitions
- the present invention relates to a device for influencing the room acoustics, in particular for reducing the reverberation time and improving speech intelligibility.
- the room acoustics is an area of acoustics that deals with the impact of the structural conditions of a room on the sound events taking place in it.
- the aim of the room acoustics is to match a room as well as possible to its intended purpose and the existing communication scenario.
- These include passive devices such as sound absorbers.
- sound absorbers There are various types of sound absorbers, such as e.g. Plate absorbers, porous absorbers and composite plate absorbers belonging to the category of flat absorbers, and z. B. wedge absorber and edge absorber.
- the low-frequency, voiced vowels of the human voice are z. As in offices the biggest disruptive factor. Therefore, sound absorbers were developed, which absorb the medium and high frequencies at low depth (elements with only about 8 cm thickness) sufficiently acoustically. However, the low frequencies are not or only slightly absorbed with the most slender Absorberlementen.
- the present invention has for its object to provide a device for the passive influence of room acoustics with a stronger low-frequency effect and a substantially uniform absorption curve over the middle and high frequencies (thirds).
- a device for the passive influence of room acoustics comprising an outer shell or cover of needled and thermally bonded plastic fibers, in particular polyester fibers, with a flow resistance LD (50Pa)> 300l / m 2 s and at least one underlying fleece of needled and thermally bonded plastic fibers, in particular polyester fibers, with a flow resistance LD (50Pa) ⁇ 200 l / m 2 s.
- the latter value for the flow resistance means that less than 200 l / m 2 s flow / flow at a pressure of 50 Pa.
- the outer shell or cover and the underlying fleece consist of the same material, but with different basis weights and flow resistance.
- the outer cover has a basis weight in the range of about 1700 g / m 2 to about 4000 g / m 2 and more preferably in the range of about 1700 g / m 2 to about 3000 g / m 2 .
- the underlying fleece has a basis weight in the range of about 1000g / m 2 to about 2500g / m 2 .
- the device comprises the outer cover and a lateral, preferably circumferential, boundary also made of needled and thermally bonded plastic fibers, in particular polyester fibers, with a flow resistance LD (50Pa)> 300l / m 2 s.
- the lateral boundary of the same material as the outer cover Preferably, the lateral boundary of the same material as the outer cover.
- the device may have the outer cover and a lateral, preferably circumferential, cover frame of sheet metal strips, in particular perforated or unperforated.
- the device additionally comprises surfaces and / or corners of stiffening sheets.
- the plate with the rear wall mechanically, for. B. by means of screws, connected and / or glued.
- the rear wall can serve as a swinging or oscillatory plate.
- the device can be fastened by a bond or mounting bracket or cable suspension to a wall or ceiling.
- the attachment to a wall or ceiling can z. B. punctiform, strip-shaped or entire surface.
- the device may function as, in particular mobile, partition, e.g. if in the middle mass a sound-absorbing plate made of e.g. Glass, steel is inserted.
- the absorber cassettes can be floor-standing, wall or ceiling-mounted.
- the thickness of the outer cover and / or the lateral boundary is in the range of about 8mm to about 25mm.
- the thickness of the web is in the range of about 20mm to about 100mm.
- the outer shell or cover has a, in particular slot-shaped or circular, perforation, preferably with a hole proportion of between 12% and 30%.
- hollow bodies are defined as Helmholtz resonators in the fleece.
- an oscillatable plate or film is present behind the nonwoven, which is backed on its back with a sound-absorbing nonwoven.
- the in the FIG. 1 shown device 10 is formed as a cassette and is shown in a mounted on a wall 12 state in horizontal or vertical section. Instead of on a wall, it could also be attached to a ceiling. Details of the attachment are in the FIG. 1 omitted.
- Said device 10 comprises an outer cover 14 with an integral lateral, preferably fully circumferential, edge 16 and fleece 18 lying behind and / or behind it.
- the cover 14 and the boundary 16 have a thickness in the range of about 8 mm to about 25 mm and consist of needled and thermally bonded polyester fibers with a basis weight in the range of about 1700 g / m 2 to about 3000 g / m 2 .
- the thickness of the fleece 18 is in the range of about 60 mm to about 100 mm.
- the web 18 consists of needled and thermally bonded polyester fibers having a basis weight in the range of about 1000 g / m 2 to about 500 g / m 2 .
- the cover 14 is a vibratable, porous plate. This is deposited with the vibration damping effect fleece 18.
- the boundary 16 may also be formed separately from the cover. For example, it may also be formed from plates or strips / strips.
- the flow resistance LD (50Pa) of the cover 14 is more than 300 l / m 2 s, while the flow resistance LD (50Pa) of the nonwoven fabric is less than 200 l / m 2 s.
- FIG. 2 shown embodiment of a device 100 for the passive influence of the room acoustics differs from that in the FIG. 1 shown device 10 essentially in that it has a cover 120 made of perforated or unperforated metal strip instead of a boundary 16 made of needled and thermally bonded polyester fibers.
- a wall / ceiling mounting by means of mounting bracket 22 made of sheet metal, which can be fastened, for example, to a wall rail 24 and a ceiling rail 26.
- the number and dimensions of the sheet metal brackets can be sized according to the static requirement.
- the facilities can also be connected by means of an adhesive bond z. B. be attached to a wall or ceiling.
- FIG. 8 schematically also shows a possibility of fastening the device (eg 10) to a ceiling 28 by means of cable suspension 30.
- the in the FIG. 3 shown embodiment of a device 200 for influencing the room acoustics differs from that in the FIG. 1
- the device 10 shown in FIG. 2 essentially comprises a perforation in the form of circular holes 215, whereby, for example, slits could be provided instead, in the filling of fleece 218 a swingable plate 232 running parallel to the cover 214, which in FIG This example is perforated, is present and beyond at least one defined hollow body 234 is provided as a Helmholtz resonator in the layer with the web 218.
- the acoustic efficiency of the device for influencing the room acoustics can be further increased.
- at least one layer could be inserted, which has a significantly higher flow resistance, such. B.> factor 5, as the flow resistance of the surrounding or adjacent material has.
- the device 300 for influencing the room acoustics has a cover 314 on the visible side with a thickness of 8 mm and consists of needled and thermally bonded polyester fibers and a loosely behind deposited fleece 318 made of needled and thermally bonded polyester fibers with a thickness of 70 mm.
- the cover 314 has a weight per unit area of 1900 g / m 2 and the fleece 318 has a basis weight of 1120 g / m 2 .
- a lateral boundary 316 of, for example, sheet metal angles or, for example, in the form of a frame construction is also provided.
- a substructure (not shown) of, for example, crosswise or parallel laid mounting rails (not shown) may be provided from sheet metal.
- the cover (s) are mechanically attached to the mounting rails and may, under certain circumstances, have a visible shadow gap (with a groove width in the range of 0 to about 5 mm).
- FIG. 5 shows for the device 300 the measured absorbance as a function of the sound frequency. It can be seen that the device absorbs considerably even in the low frequency range and the absorption capacity is relatively uniform over a large frequency range.
- FIG. 9 shows an isometric view on the left, in the middle a vertical section and on the right a horizontal section, of another device 400 for influencing the room acoustics in the form of an edge absorber.
- the device 400 has an outer shell 415 with a thickness in the range of 8 to 25 mm.
- the sheath 415 is made of needled and thermally bonded polyester fibers having a basis weight in the range of 1700 to 3000 g / m 2 .
- a filling 420 made of needled and thermally bonded polyester fibers with a basis weight of about 1000 to about 2500 g / m 2 .
- An edge absorber is generally an acoustically highly effective construction of a columnar structure, for example with dimensions of about 400 x 400 x 1000 - 2200mm, which can absorb the standing modes of sound in the edges of the room and in particular the middle to low-frequency areas.
- the sound waves penetrate into the structure and are converted into heat by the porous material of the filling of thermally bonded, needled polyester fibers.
- the panels enveloping the structure oscillate and have a higher flow resistance and are damped on the polyester fibers.
- various acoustically absorbing principles of action act in a structure, which also in the edges of the room airborne sound waves, can absorb absorbed collected over the walls.
- the devices can be used, for example, as flat absorber cladding in room corners, absorber wall surfaces on the front sides of a room, flat acoustic ceiling cladding, individual absorbers on a wall, suspended absorber ceiling sails or in room-high glass walls with absorber elements as sound screens, as acoustically effective sideboards.
- acoustic screens made of room-high glass elements made of single-pane glass with absorbers T-shaped screens made of floor-to-ceiling glass elements made of single-pane glass with absorbers and in sound screens made of room-high glass elements made of single-pane glass.
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- Acoustics & Sound (AREA)
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- Civil Engineering (AREA)
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Abstract
Die Erfindung betrifft eine Einrichtung (10; 100; 200; 300; 400) zur Beeinflussung der Raumakustik, umfassend eine äußere Hülle (415) oder Abdeckung (14; 114; 214; 314) aus vernadelten und thermisch verfestigten Kunststofffasern, insbesondere Polyesterfasern, mit einem Strömungswiderstand LD (50Pa)>300l/m 2 s und mindestens ein dahinterliegendes Vlies (18; 118; 218; 318) aus vernadelten und thermisch verfestigten Kunststofffasern, insbesondere Polyesterfasern, mit einem Strömungswiderstand LD (50Pa)<200l/m 2 s.The invention relates to a device (10; 100; 200; 300; 400) for influencing the room acoustics, comprising an outer shell (415) or cover (14; 114; 214; 314) of needled and thermally bonded plastic fibers, in particular polyester fibers a flow resistance LD (50 Pa)> 300 l / m 2 s and at least one fleece (18; 118; 218; 318) made of needled and thermally bonded plastic fibers, in particular polyester fibers, with a flow resistance LD (50 Pa) <200 l / m 2 s.
Description
Die vorliegende Erfindung betrifft eine Einrichtung zur Beeinflussung der Raumakustik, insbesondere zur Reduzierung der Nachhallzeit und Verbesserung der Sprachverständlichkeit. Laut Wikipedia ist die Raumakustik ein Gebiet der Akustik, das sich mit der Auswirkung der baulichen Gegebenheiten eines Raumes auf die in ihm stattfindenden Schallereignisse beschäftigt. Ziel der Raumakustik ist es, einen Raum möglichst gut auf seinen Bestimmungszweck und das bestehende Kommunikationsszenarium hin abzustimmen. Dazu kommen unter anderem passive Einrichtungen, wie Schallabsorber, zum Einsatz. Es gibt diverse Arten von Schallabsorbern, wie z.B. Plattenabsorber, poröse Absorber und Verbund-Platten-Absorber, die zur Kategorie der Flachabsorber gehören, und z. B. Keilabsorber und Kantenabsorber.The present invention relates to a device for influencing the room acoustics, in particular for reducing the reverberation time and improving speech intelligibility. According to Wikipedia, the room acoustics is an area of acoustics that deals with the impact of the structural conditions of a room on the sound events taking place in it. The aim of the room acoustics is to match a room as well as possible to its intended purpose and the existing communication scenario. These include passive devices such as sound absorbers. There are various types of sound absorbers, such as e.g. Plate absorbers, porous absorbers and composite plate absorbers belonging to the category of flat absorbers, and z. B. wedge absorber and edge absorber.
Tieffrequenter Schall erzeugt in Räumen ein Dröhnen bei den Eigenfrequenzen der Räume. Dieses Dröhnen kann mit großvolumigen bekannten Bauteilen, z.B. abgehängten Decken, großen Helmholz-Resonatoren oder sogenannten Bassfallen, baukonstruktiv unterbunden werden, indem die dröhnenden Frequenzbereiche des Schalls absorbiert werden. In vielen Räumen sind diese konstruktiven Lösungen jedoch nicht mehr gewünscht.Low-frequency sound creates a roar in the rooms' natural frequencies. This droning can be achieved with large volume known components, e.g. Suspended ceilings, large Helmholtz resonators or so-called bass traps are structurally prevented by the booming frequency ranges of sound are absorbed. In many rooms, however, these constructive solutions are no longer desired.
Die tieffrequenten, stimmhaften Vokale der menschlichen Stimme sind z. B. in Büros der größte Störfaktor. Daher wurden Schallabsorber entwickelt, welche die mittleren und hohen Frequenzen bei geringer Bautiefe (Elemente mit nur ca. 8 cm Stärke) ausreichend akustisch absorbieren. Die tiefen Frequenzen werden mit den meisten schlanken Absorberlementen aber gar nicht oder nur verhältnismäßig geringfügig absorbiert.The low-frequency, voiced vowels of the human voice are z. As in offices the biggest disruptive factor. Therefore, sound absorbers were developed, which absorb the medium and high frequencies at low depth (elements with only about 8 cm thickness) sufficiently acoustically. However, the low frequencies are not or only slightly absorbed with the most slender Absorberlementen.
Der vorliegenden Erfindung liegt die Aufgabe zugrunde, eine Einrichtung zur passiven Beeinflussung der Raumakustik mit einer stärkeren tieffrequenten Wirkung sowie einem im Wesentlichen gleichmäßigen Absorptionsverlauf auch über die mittleren und hohen Frequenzen (Terzen) bereitzustellen.The present invention has for its object to provide a device for the passive influence of room acoustics with a stronger low-frequency effect and a substantially uniform absorption curve over the middle and high frequencies (thirds).
Erfindungsgemäß wird diese Aufgabe gelöst durch eine Einrichtung zur passiven Beeinflussung der Raumakustik, umfassend eine äußere Hülle oder Abdeckung aus vernadelten und thermisch verfestigten Kunststofffasern, insbesondere Polyesterfasern, mit einem Strömungswiderstand LD (50Pa)>300l/m2s und mindestens ein dahinterliegendes Vlies aus vernadelten und thermisch verfestigten Kunststofffasern, insbesondere Polyesterfasern, mit einem Strömungswiderstand LD (50Pa)<200l/m2s. Beispielsweise der letztgenannte Wert für den Strömungswiderstand bedeutet, dass bei einem Druck von 50 Pa weniger als 200 l/m2s fließen/strömen. Vorzugsweise bestehen die äußere Hülle bzw. Abdeckung und das dahinterliegende Vlies aus demselben Material, aber mit unterschiedlichen Flächengewichten und Strömungswiderständen.According to the invention this object is achieved by a device for the passive influence of room acoustics, comprising an outer shell or cover of needled and thermally bonded plastic fibers, in particular polyester fibers, with a flow resistance LD (50Pa)> 300l / m 2 s and at least one underlying fleece of needled and thermally bonded plastic fibers, in particular polyester fibers, with a flow resistance LD (50Pa) <200 l / m 2 s. For example, the latter value for the flow resistance means that less than 200 l / m 2 s flow / flow at a pressure of 50 Pa. Preferably, the outer shell or cover and the underlying fleece consist of the same material, but with different basis weights and flow resistance.
Vorteilhafterweise weist die äußere Hülle bzw. Abdeckung ein Flächengewicht im Bereich von circa 1700g/m2 bis circa 4000g/m2 und bevorzugter im Bereich von circa 1700g/m2 bis circa 3000g/m2 auf.Advantageously, the outer cover has a basis weight in the range of about 1700 g / m 2 to about 4000 g / m 2 and more preferably in the range of about 1700 g / m 2 to about 3000 g / m 2 .
Ebenfalls vorteilhafterweise weist das dahinterliegende Vlies ein Flächengewicht im Bereich von circa 1000g/m2 bis circa 2500g/m2 auf.Also advantageously, the underlying fleece has a basis weight in the range of about 1000g / m 2 to about 2500g / m 2 .
Gemäß einer besonderen Ausführungsform der vorliegenden Erfindung weist die Einrichtung die äußere Abdeckung und eine seitliche, vorzugsweise umlaufende, Berandung ebenfalls aus vernadelten und thermisch verfestigten Kunststofffasern, insbesondere Polyesterfasern, mit einem Strömungswiderstand LD (50Pa)>300l/m2s.According to a particular embodiment of the present invention, the device comprises the outer cover and a lateral, preferably circumferential, boundary also made of needled and thermally bonded plastic fibers, in particular polyester fibers, with a flow resistance LD (50Pa)> 300l / m 2 s.
Vorzugsweise besteht die seitliche Berandung aus demselben Material wie die äußere Abdeckung.Preferably, the lateral boundary of the same material as the outer cover.
Alternativ kann die Einrichtung die äußere Abdeckung und einen seitlichen, vorzugsweise umlaufenden, Abdeckrahmen aus Blechstreifen, insbesondere perforiert oder unperforiert, aufweisen.Alternatively, the device may have the outer cover and a lateral, preferably circumferential, cover frame of sheet metal strips, in particular perforated or unperforated.
Zweckmäßigerweise weist die Einrichtung zusätzlich Flächen und/oder Ecken aussteifende Bleche auf.Expediently, the device additionally comprises surfaces and / or corners of stiffening sheets.
Insbesondere kann dabei vorgesehen sein, dass sie eine Rückwand aufweist und das Blech mit der Rückwand mechanisch, z. B. mittels Schrauben, verbunden und/oder verklebt ist. Die Rückwand kann als schwingende bzw. schwingfähige Platte dienen.In particular, it may be provided that it has a rear wall and the plate with the rear wall mechanically, for. B. by means of screws, connected and / or glued. The rear wall can serve as a swinging or oscillatory plate.
Weiterhin kann vorgesehen sein, dass sie durch eine Verklebung oder Befestigungswinkel oder Seilabhänger an einer Wand oder Decke befestigbar ist. Die Befestigung an einer Wand oder Decke kann z. B. punktförmig, streifenförmig oder ganzflächig sein. Zudem kann die Einrichtung als, insbesondere mobile, Trennwand fungieren, z.B. wenn in der Mittelmasse eine schalldämmende Platte aus z.B. Glas, Stahl eingefügt ist. Die Absorberkassetten können bodenstehend, wand- oder deckenhängend ausgebildet sein.Furthermore, it can be provided that it can be fastened by a bond or mounting bracket or cable suspension to a wall or ceiling. The attachment to a wall or ceiling can z. B. punctiform, strip-shaped or entire surface. In addition, the device may function as, in particular mobile, partition, e.g. if in the middle mass a sound-absorbing plate made of e.g. Glass, steel is inserted. The absorber cassettes can be floor-standing, wall or ceiling-mounted.
Vorteilhafterweise liegt die Dicke der äußeren Abdeckung und/oder der seitlichen Berandung im Bereich von circa 8mm bis circa 25mm.Advantageously, the thickness of the outer cover and / or the lateral boundary is in the range of about 8mm to about 25mm.
Zweckmäßigerweise liegt die Dicke des Vlieses im Bereich von circa 20mm bis circa 100mm.Conveniently, the thickness of the web is in the range of about 20mm to about 100mm.
Gemäß einer besonderen Ausführungsform der vorliegenden Erfindung weist die äußere Hülle oder Abdeckung eine, insbesondere schlitzförmige oder kreisförmige, Perforierung, vorzugsweise mit einem Lochanteil zwischen 12% und 30%, auf.According to a particular embodiment of the present invention, the outer shell or cover has a, in particular slot-shaped or circular, perforation, preferably with a hole proportion of between 12% and 30%.
Gemäß einer weiteren besonderen Ausführungsform der vorliegenden Erfindung sind im Vlies Hohlkörper als Helmholtz-Resonatoren definiert angeordnet.According to a further particular embodiment of the present invention, hollow bodies are defined as Helmholtz resonators in the fleece.
In einer weiteren besonderen Ausführungsform der vorliegenden Erfindung ist hinter dem Vlies eine schwingfähige Platte oder Folie vorhanden, welche auf ihrer Rückseite mit einem schalldämpfenden Vlies hinterlegt ist.In a further particular embodiment of the present invention, an oscillatable plate or film is present behind the nonwoven, which is backed on its back with a sound-absorbing nonwoven.
Schließlich ist bei einer weiteren besonderen Ausführungsform der vorliegenden Erfindung zusätzlich mindestens eine Schicht hinter der äußeren Hülle oder Abdeckung vorhanden, deren Strömungswiderstand um einen Faktor, der größer als 5 ist, größer als der Strömungswiderstand eines angrenzenden Materials ist.Finally, in another particular embodiment of the present invention, there is additionally at least one layer behind the outer shell or cover whose flow resistance is greater than the flow resistance of an adjacent material by a factor greater than 5.
Der vorliegenden Erfindung liegt die überraschende Erkenntnis zugrunde, dass durch das Vorsehen einer schwingfähigen, porösen Hülle oder Abdeckung, insbesondere in Plattenform (= Plattenschwinger), aus Polyesterfasern in Kombination mit einem hinterlegten die Schwingung bedämpfenden Material aus Polyesterfaservlies mit deutlich verschiedenen Strömungswiderständen (Hülle/Abdeckung (Platte), Füllung) ein gleichmäßig hoher Absorptionsverlauf über die Frequenzen erzielt werden kann. Poröse Absorber allein brechen in ihrer Wirksamkeit bei üblichen Baudicken bei ca. 500 Herz ein.The present invention is based on the surprising finding that by providing a vibratory, porous shell or cover, in particular in plate form (= plate vibrator), made of polyester fibers in combination with a deposited the vibration damping material made of polyester fiber fleece clearly different flow resistances (shell / cover (plate), filling) a uniformly high absorption curve over the frequencies can be achieved. Porous absorbers alone break down in their effectiveness at usual building thickness at about 500 heart.
Hiermit werden insbesondere in kleinen und mittleren Räumen die stehenden Moden aus den tieffrequenten Anteilen der menschlichen Vokale absorbiert. Hierdurch wird ein angenehmes akustisches Raumldima hergestellt und werden die wenig stimmhaften Konsonanten der Stimme besser verstanden.Hereby, especially in small and medium sized rooms, the standing modes are absorbed from the low-frequency parts of the human vowels. As a result, a pleasant acoustic Raumldima is produced and the less voiced consonants of the voice are better understood.
Weitere Merkmale und Vorteile der Erfindung ergeben sich aus den beigefügten Ansprüchen und der nachfolgenden Beschreibung, in der mehrere Ausführungsbeispiele anhand der schematischen Zeichnungen im Einzelnen erläutert werden. Dabei zeigt:
- Figur 1
- eine Einrichtung zur passiven Beeinflussung der Raumakustik gemäß einer besonderen Ausführungsform der vorliegenden Erfindung in Schnittansicht;
- Figur 2
- eine Einrichtung zur passiven Beeinflussung der Raumakustik gemäß einer weiteren besonderen Ausführungsform der vorliegenden Erfindung in Schnittansicht;
- Figur 3
- eine Einrichtung zur passiven Beeinflussung der Raumakustik gemäß einer weiteren besonderen Ausführungsform der vorliegenden Erfindung in Schnittansicht;
- Figur 4
- eine Einrichtung zur passiven Beeinflussung der Raumakustik gemäß einer weiteren besonderen Ausführungsform der vorliegenden Erfindung in Schnittansicht;
- Figur 5
- eine gemessene Absorptionskurve für die Einrichtung zur passiven Beeinflussung der Raumakustik gemäß
Figur 4 ; - Figur 6
- eine Möglichkeit der Wandbefestigung einer Einrichtung zur passiven Beeinflussung der Raumakustik gemäß einer besonderen Ausführungsform der vorliegenden Erfindung;
- Figur 7
- eine Möglichkeit der Deckenbefestigung einer Einrichtung zur passiven Beeinflussung der Raumakustik gemäß einer besonderen Ausführungsform der vorliegenden Erfindung;
- Figur 8
- eine weitere Möglichkeit der Deckenbefestigung einer Einrichtung zur passiven Beeinflussung der Raumakustik gemäß einer besonderen Ausführungsform der vorliegenden Erfindung; und
- Figur 9
- eine isometrische Ansicht sowie einen Vertikalschnitt und einen Horizontalschnitt einer Einrichtung zur passiven Beeinflussung der Raumakustik gemäß einer besonderen Ausführungsform der vorliegenden Erfindung.
- FIG. 1
- a device for the passive influence of room acoustics according to a particular embodiment of the present invention in sectional view;
- FIG. 2
- a device for the passive influence of the room acoustics according to a further particular embodiment of the present invention in sectional view;
- FIG. 3
- a device for the passive influence of the room acoustics according to a further particular embodiment of the present invention in sectional view;
- FIG. 4
- a device for the passive influence of the room acoustics according to a further particular embodiment of the present invention in sectional view;
- FIG. 5
- a measured absorption curve for the device for the passive influence of room acoustics according to
FIG. 4 ; - FIG. 6
- a possibility of wall mounting a device for the passive influence of room acoustics according to a particular embodiment of the present invention;
- FIG. 7
- a possibility of ceiling mounting a device for the passive influence of room acoustics according to a particular embodiment of the present invention;
- FIG. 8
- another possibility of ceiling mounting a device for the passive influence of room acoustics according to a particular embodiment of the present invention; and
- FIG. 9
- an isometric view and a vertical section and a horizontal section of a device for the passive influence of the room acoustics according to a particular embodiment of the present invention.
Die in der
Besagte Einrichtung 10 umfasst eine äußere Abdeckung 14 mit einer integralen seitlichen, vorzugsweise vollumlaufenden, Berandung 16 und darin bzw. dahinter liegenden Vlies 18.Said
Die Abdeckung 14 und die Berandung 16 weisen eine Dicke im Bereich von ca. 8 mm bis ca. 25 mm auf und bestehen aus vernadelten und thermisch verfestigten Polyesterfasern mit einem Flächengewicht im Bereich von ca. 1700 g/m2 bis ca. 3000 g/m2. Die Dicke des Vlieses 18 liegt im Bereich von ca. 60 mm bis ca. 100 mm. Das Vlies 18 besteht aus vernadelten und thermisch verfestigten Polyesterfasern mit einem Flächengewicht im Bereich von ca. 1000 g/m2 bis ca. 500 g/m2.The
Bei der Abdeckung 14 handelt sich um eine schwingfähige, poröse Platte. Diese ist mit dem die Schwingung bedämpfend wirkenden Vlies 18 hinterlegt.The
Die Berandung 16 kann auch separat von der Abdeckung ausgebildet sein. Beispielsweise kann sie ebenfalls aus Platten bzw. Streifen/Leisten gebildet sein.The
Der Strömungswiderstand LD (50Pa) der Abdeckung 14 beträgt mehr als 300 l/m2s, während der Strömungswiderstand LD (50Pa) des Vlieses weniger als 200 l/m2s beträgt.The flow resistance LD (50Pa) of the
Die in der
Für die Wandmontage können in der Einrichtung 10 bzw. 100 innenseitig noch Flächen und Ecken ausstreifende Bleche 20 (siehe
Die in der
Die in der
Bei der in der
Ein Kantenabsorber ist ganz allgemein eine akustisch hochwirksame Konstruktion eines säulenartigen Baukörpers, z.B. mit Abmessungen von ca. 400 x 400 x 1000 - 2200mm, welcher in den Raumkanten die stehenden Moden des Schalls und hier insbesondere die mittleren bis tieffrequenten Bereiche absorbieren kann. Die Schallwellen dringen in den Baukörper ein und werden durch das poröse Material der Füllung aus thermisch verfestigten, vernadelten Polyesterfasern in Wärme umgewandelt. Zudem schwingen die den Baukörper umhüllenden Platten und besitzen einen höheren Strömungswiderstand und sind auf den Polyesterfasern bedämpfend aufgelagert. Somit wirken verschiedene akustisch absorbierende Wirkprinzipien in einem Aufbau, welcher zudem in den Raumkanten die Luftschallwellen, über die Wände reflektierend gesammelt absorbieren kann.An edge absorber is generally an acoustically highly effective construction of a columnar structure, for example with dimensions of about 400 x 400 x 1000 - 2200mm, which can absorb the standing modes of sound in the edges of the room and in particular the middle to low-frequency areas. The sound waves penetrate into the structure and are converted into heat by the porous material of the filling of thermally bonded, needled polyester fibers. In addition, the panels enveloping the structure oscillate and have a higher flow resistance and are damped on the polyester fibers. Thus, various acoustically absorbing principles of action act in a structure, which also in the edges of the room airborne sound waves, can absorb absorbed collected over the walls.
Die Einrichtungen können ganz allgemein beispielsweise als flächige Absorber-Verkleidung in Raumecken, Absorberwandflächen an den Stirnseiten eines Raumes, flächige Akustikdecken-Verkleidung, einzelne Absorber an einer Wand, abgehängte Absorber-Deckensegel oder in raumhohen Glaswänden mit Absorberelementen als Schallschirme, als akustisch wirksame Sideboards, in Schallschirmen aus raumhohen Glaselementen aus Einscheibenglas mit Absorbern, T-Schallschirmen aus raumhohen Glaselementen aus Einscheibenglas mit Absorbern und in Schallschirmen aus raumhohen Glaselementen aus Einscheibenglas verwendet werden.In general, the devices can be used, for example, as flat absorber cladding in room corners, absorber wall surfaces on the front sides of a room, flat acoustic ceiling cladding, individual absorbers on a wall, suspended absorber ceiling sails or in room-high glass walls with absorber elements as sound screens, as acoustically effective sideboards. in acoustic screens made of room-high glass elements made of single-pane glass with absorbers, T-shaped screens made of floor-to-ceiling glass elements made of single-pane glass with absorbers and in sound screens made of room-high glass elements made of single-pane glass.
Die in der vorstehenden Beschreibung, in den Zeichnungen sowie in den Ansprüchen offenbarten Merkmale der Erfindung können sowohl einzeln als auch in den beliebigen Kombinationen für die Verwirklichung der Erfindung in ihren verschiedenen Ausführungsformen wesentlich sein.The features of the invention disclosed in the foregoing description, in the drawings and in the claims may be essential both individually and in any desired combinations for the realization of the invention in its various embodiments.
- 1010
- EinrichtungFacility
- 1212
- Wandwall
- 1414
- Abdeckungcover
- 1616
- Berandungboundary
- 1818
- Vliesfleece
- 2020
- Blechesheets
- 2222
- Befestigungswinkelmounting brackets
- 2424
- Wandschienewall rail
- 2626
- Deckenschieneceiling rail
- 2828
- Deckeblanket
- 3030
- Seilabhängerwire suspension
- 100100
- EinrichtungFacility
- 112112
- Wandwall
- 114114
- Abdeckungcover
- 118118
- Vliesfleece
- 120120
- AbdeckrahmenCover
- 200200
- EinrichtungFacility
- 212212
- Wandwall
- 214214
- Abdeckungcover
- 215215
- Löcherholes
- 216216
- Berandungboundary
- 218218
- Vliesfleece
- 232232
- Platteplate
- 234234
- Hohlkörperhollow body
- 300300
- EinrichtungFacility
- 312312
- Wandwall
- 314314
- Abdeckungcover
- 316316
- Berandungboundary
- 318318
- Vliesfleece
- 400400
- EinrichtungFacility
- 415415
- Hülleshell
- 420420
- Füllungfilling
Claims (14)
eine äußere Hülle (415) oder Abdeckung (14; 114; 214; 314) aus vernadelten und thermisch verfestigten Kunststofffasern, insbesondere Polyesterfasern, mit einem Strömungswiderstand LD (50Pa)>300l/m2s und
mindestens ein dahinterliegendes Vlies (18; 118; 218; 318) aus vernadelten und thermisch verfestigten Kunststofffasern, insbesondere Polyesterfasern, mit einem Strömungswiderstand LD (50Pa)<200l/m2s.Device (10; 100; 200; 300; 400) for influencing the room acoustics, comprising
an outer shell (415) or cover (14; 114; 214; 314) of needled and thermally bonded plastic fibers, in particular polyester fibers, with a flow resistance LD (50Pa)> 300l / m 2 s and
at least one underlying nonwoven (18; 118; 218; 318) of needled and thermally bonded plastic fibers, in particular polyester fibers, with a flow resistance LD (50Pa) <200 l / m 2 s.
Priority Applications (1)
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EP17167036.7A EP3392423A1 (en) | 2017-04-19 | 2017-04-19 | Device for passive influencing of the acoustics of a room |
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Application Number | Priority Date | Filing Date | Title |
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EP17167036.7A EP3392423A1 (en) | 2017-04-19 | 2017-04-19 | Device for passive influencing of the acoustics of a room |
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Publication Number | Publication Date |
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Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2010281131A (en) * | 2009-06-05 | 2010-12-16 | Bridgestone Kbg Co Ltd | Sound absorbing panel |
JP2014211640A (en) * | 2014-05-30 | 2014-11-13 | 名古屋油化株式会社 | Acoustic isolation panel member |
-
2017
- 2017-04-19 EP EP17167036.7A patent/EP3392423A1/en not_active Withdrawn
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2010281131A (en) * | 2009-06-05 | 2010-12-16 | Bridgestone Kbg Co Ltd | Sound absorbing panel |
JP2014211640A (en) * | 2014-05-30 | 2014-11-13 | 名古屋油化株式会社 | Acoustic isolation panel member |
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