EP2100292A1 - Method for absorbing sound waves - Google Patents
Method for absorbing sound wavesInfo
- Publication number
- EP2100292A1 EP2100292A1 EP07861089A EP07861089A EP2100292A1 EP 2100292 A1 EP2100292 A1 EP 2100292A1 EP 07861089 A EP07861089 A EP 07861089A EP 07861089 A EP07861089 A EP 07861089A EP 2100292 A1 EP2100292 A1 EP 2100292A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- absorbent
- walls
- present
- room
- roof
- 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- Withdrawn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
- 238000000034 method Methods 0.000 title claims abstract description 19
- 230000002745 absorbent Effects 0.000 claims abstract description 48
- 239000002250 absorbent Substances 0.000 claims abstract description 48
- 239000002344 surface layer Substances 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 8
- 239000010410 layer Substances 0.000 claims description 7
- 239000004744 fabric Substances 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 5
- 239000003365 glass fiber Substances 0.000 claims description 4
- 239000002023 wood Substances 0.000 claims description 4
- 239000004033 plastic Substances 0.000 claims description 3
- 238000010521 absorption reaction Methods 0.000 description 13
- 230000000694 effects Effects 0.000 description 3
- 239000011358 absorbing material Substances 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 239000011491 glass wool Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000000246 remedial effect Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 210000002268 wool Anatomy 0.000 description 1
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
- E04B1/8209—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 sound absorbing devices
-
- 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
- E04B2001/8263—Mounting of acoustical elements on supporting structure, e.g. framework or wall surface
- E04B2001/829—Flat elements mounted at an angle, e.g. right angle, to the supporting surface
Definitions
- the present invention relates to a method according to the preamble to appended Claim 1.
- the task forming the basis of the present invention is to satisfy the above-outlined needs.
- the method according to the present invention realises an extremely versatile possibility for governing the sound waves in a room.
- An absorbent according to the present invention permits the absorption of relatively low frequency sound.
- An absorbent which is positioned using the method according to the present invention will have an extremely good absorbing effect on the octave band 125 Hz.
- the method according to the present invention further makes for a versatile and simple assembly with different types of shells and the flexibility of the product makes for an enormous wealth of variation for the user.
- An absorbent according to the present invention may possibly be employed as a table or a shelf.
- An absorbent according to the present invention may further be positioned, as was mentioned above, between two converging walls, centrally on a wall, at the edge between wall and roof or as an item of furniture in a corner.
- the present invention further makes for an adjustable and highly variable effect on the acoustics in a room, with the aid of different types of slat device solutions.
- Fig. 1 is a perspective view of a corner of a room with an absorbent according to the present invention.
- Fig. 2 is a perspective view of a further embodiment of an absorbent according to the present invention.
- Fig. 3 is a perspective view of an embodiment of the same type as in Fig. 2.
- Fig. 4 is a perspective view of one embodiment of an absorbent according to the present invention.
- Fig. 5 is a top plan view of an absorbent according to the present invention.
- Fig. 6 is a graph illustrating the employment of an absorbent according to the present invention.
- a panel 1 of absorbent material is positioned in a corner between two walls 2 and 3, and a floor 4.
- the panel consists of a per se known absorbent material with selected flow resistance and selected absorbent thickness, as well as selected distance from the actual apex of the corner to the middle or centre of the panel. The distance should suitably be a quarter of the wavelength of the sound waves which it is desired to absorb.
- the configuration of the panel is adapted to the corner between the walls 2, 3 and the floor 4.
- Fig. 1 intimates additional absorbent layers for illustrating that the absorbent according to the present invention may consist of a plurality of layers for the absorption of sound waves of several different frequencies.
- the different parameters may naturally be varied for attaining absorption of the desired frequency and/or frequencies. It is also possible to provide the panel with a slat arrangement in order to permit adjustment or variation of the absorption. Further, the panel 1 may be positioned down at the floor (as shown), a distance above the floor, or even up at the roof in the room. In that case when the room is provided with an inner ceiling, a corner absorbent according to the present invention may be positioned in one or more of the corners in the space above the ceiling, for example in the corner between two walls and the beam structure above the ceiling.
- Figs. 2 and 3 show further examples of absorbents according to the present invention.
- the arrow 1 relates to flow resistance, increased flow resistance entailing reduced speed and thereby shorter wavelength.
- the arrows 2 relate to the distance from the apex of the corner, which implies wavelength/4, in which even the distance varies with the angle of impingement.
- the arrow 3 relates to the absorbent thickness, in which event increased thickness affords absorption of lower frequencies.
- Fig. 4 shows yet a further embodiment of an absorbent according to the present invention which has pyramidal side surfaces 5 and 6 which are placed in a framework consisting of longitudinal angle profiles 7, 8 and 9, a bottom 10 and top members 11 and 12.
- the profiles may be manufactured from metal, wood, plastic or some other similar material.
- the absorbent according to the present invention it is possible to achieve absorption factors of 3-6. On positioning of the absorbent in a corner, the absorption factor 3 will be achieved after the selection of suitable parameters.
- An absorbent according to the present invention may be manufactured from angular cut absorbent material of selected density and thickness. Further, the panel may be provided with a frame for protection and assembly, in which even the frame is advantageously manufactured from metal, but other materials are naturally also possible. The panel may be provided with a surface cladding of cloth or glass fibre fabric. Its size is adapted as was mentioned above to the need for absorption. For versatile adaptation, the absorbent may be provided with hatches or slats of metal or wood, or other material. The absorbent according to the present invention makes for the cost-effective governing of the acoustics in a room. If the absorbent is provided with a dense surface layer, the absorption of high frequencies may be counteracted. Using extremely porous absorbent and a surface layer of a thickness of 2 to 3 cm, the flow resistance will be extremely low, so that frequencies of up to 16000 Hz are absorbed.
- Fig. 5 shows a further embodiment of an absorbent according to the present invention, which comprises three layers 13, 14, 15, which may have different properties, e.g. difference flow resistances.
- a surface layer 16 of suitable material, for example glass fibre fabric, is disposed on the outside of the outer layer 13, and a surface layer 17 is disposed on the inside of the inner layer 15.
- Surface layers may also be provided between the absorbent layers 13, 14 and 15.
- the surface layers may possibly consist of membranes of different permeabilities.
- the surface layers may also be wholly and/or partly covering.
- Fig. 6 shows a graph in the form of a sinus curve of a sound wave in air, an absorbent and air, it being apparent that the speed of the sound in a selection of suitable flow resistances (sonic impedance) in the absorbent is reduced to for example 120m/s and that the wavelength is reduced by 65%.
- the corner absorbent according to the present invention permits a shortening of the distance to the corner and nevertheless a quarter wavelength will be achieved in the absorbent. With the distance a quarter wavelength from the corner, the reduction of particle movement (speed) will be at its maximum for each frequency and maximum absorption will be achieved.
- the absorbent had a flow resistance which reduced the sound speed from approx. 340 m/s to approx. 100 m/s and which was positioned a quarter wavelength or its equivalent from the corner apex, there was obtained a sound damping of approx. times.
- For absorption of sound waves of the frequency 125 Hz it is appropriate to combine a 100 mm thick glass fibre wool panel of the high compact type with a 50 mm thick glass wool panel of the low compact type. At the frequency of 60 Hz, the thicknesses of 250 mm and 50 mm, respectively, are selected.
- the wavelength is reduced by approx. 65% and the distance between the apex of the corner and the absorbent can then be reduced correspondingly in order to achieve a quarter wavelength and thereby maximum absorption.
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE0602831A SE0602831L (en) | 2006-12-28 | 2006-12-28 | Ways of absorbing sound waves |
PCT/SE2007/001131 WO2008088251A1 (en) | 2006-12-28 | 2007-12-19 | Method for absorbing sound waves |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2100292A1 true EP2100292A1 (en) | 2009-09-16 |
EP2100292A4 EP2100292A4 (en) | 2014-03-12 |
Family
ID=39636178
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP07861089.6A Withdrawn EP2100292A4 (en) | 2006-12-28 | 2007-12-19 | Method for absorbing sound waves |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP2100292A4 (en) |
SE (1) | SE0602831L (en) |
WO (1) | WO2008088251A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT516861B1 (en) * | 2015-01-30 | 2017-06-15 | Getzner Textil Ag | absorber device |
US11568847B2 (en) * | 2021-02-01 | 2023-01-31 | Jayvic Llc | Full frequency acoustic system and method of use |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0037610A1 (en) * | 1980-04-09 | 1981-10-14 | Byggnadsfysik A & K AB | An arrangement for damping and absorption of sound in rooms |
US5035298A (en) * | 1990-04-02 | 1991-07-30 | Noxon Arthur M | Wall attached sound absorptive structure |
EP0441759A1 (en) * | 1990-02-08 | 1991-08-14 | Rockwool Aktiebolaget | Vaulted acoustic element |
DE29815723U1 (en) * | 1997-09-04 | 1999-06-10 | Fraunhofer Ges Forschung | Low-reflection room for the entire listening area |
US5992561A (en) * | 1998-01-06 | 1999-11-30 | Kinetics Noise Control | Sound absorber, room and method of making |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19506511C2 (en) * | 1995-02-24 | 1998-08-27 | Fraunhofer Ges Forschung | Plate resonator |
US5923002A (en) * | 1997-11-12 | 1999-07-13 | Owens Corning Fiberglas Technology, Inc. | Acoustical room paneling and method of installation |
US6015025A (en) * | 1997-06-06 | 2000-01-18 | Owens Corning Fiberglas Technology, Inc. | Diffuser panel with built-in speaker arrangement and methods of installation |
DE19804718C2 (en) * | 1998-02-06 | 2001-09-13 | Eurocopter Deutschland | Sound absorbing sandwich wall |
-
2006
- 2006-12-28 SE SE0602831A patent/SE0602831L/en unknown
-
2007
- 2007-12-19 WO PCT/SE2007/001131 patent/WO2008088251A1/en active Application Filing
- 2007-12-19 EP EP07861089.6A patent/EP2100292A4/en not_active Withdrawn
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0037610A1 (en) * | 1980-04-09 | 1981-10-14 | Byggnadsfysik A & K AB | An arrangement for damping and absorption of sound in rooms |
EP0441759A1 (en) * | 1990-02-08 | 1991-08-14 | Rockwool Aktiebolaget | Vaulted acoustic element |
US5035298A (en) * | 1990-04-02 | 1991-07-30 | Noxon Arthur M | Wall attached sound absorptive structure |
DE29815723U1 (en) * | 1997-09-04 | 1999-06-10 | Fraunhofer Ges Forschung | Low-reflection room for the entire listening area |
US5992561A (en) * | 1998-01-06 | 1999-11-30 | Kinetics Noise Control | Sound absorber, room and method of making |
Non-Patent Citations (1)
Title |
---|
See also references of WO2008088251A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO2008088251A1 (en) | 2008-07-24 |
EP2100292A4 (en) | 2014-03-12 |
SE0602831L (en) | 2008-06-29 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
17P | Request for examination filed |
Effective date: 20090713 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR |
|
DAX | Request for extension of the european patent (deleted) | ||
A4 | Supplementary search report drawn up and despatched |
Effective date: 20140206 |
|
RIC1 | Information provided on ipc code assigned before grant |
Ipc: E04B 1/82 20060101AFI20140131BHEP Ipc: G10K 11/168 20060101ALI20140131BHEP Ipc: E04B 1/99 20060101ALI20140131BHEP |
|
17Q | First examination report despatched |
Effective date: 20170217 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
18D | Application deemed to be withdrawn |
Effective date: 20180905 |