GB2446640A - An acoustic attenuation device - Google Patents
An acoustic attenuation device Download PDFInfo
- Publication number
- GB2446640A GB2446640A GB0702870A GB0702870A GB2446640A GB 2446640 A GB2446640 A GB 2446640A GB 0702870 A GB0702870 A GB 0702870A GB 0702870 A GB0702870 A GB 0702870A GB 2446640 A GB2446640 A GB 2446640A
- Authority
- GB
- United Kingdom
- Prior art keywords
- attenuation device
- housing
- attenuator
- engagement
- engagement member
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000008878 coupling Effects 0.000 claims abstract description 8
- 238000010168 coupling process Methods 0.000 claims abstract description 8
- 238000005859 coupling reaction Methods 0.000 claims abstract description 8
- 238000000034 method Methods 0.000 claims abstract description 6
- 239000006261 foam material Substances 0.000 claims description 5
- 239000007769 metal material Substances 0.000 claims description 5
- 230000009467 reduction Effects 0.000 claims description 2
- 239000006260 foam Substances 0.000 abstract description 16
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 3
- 239000004411 aluminium Substances 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 239000003000 extruded plastic Substances 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 229920001684 low density polyethylene Polymers 0.000 description 1
- 239000004702 low-density polyethylene Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000009418 renovation Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F1/00—Springs
- F16F1/36—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers
- F16F1/37—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers of foam-like material, i.e. microcellular material, e.g. sponge rubber
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F15/00—Flooring
- E04F15/18—Separately-laid insulating layers; Other additional insulating measures; Floating floors
- E04F15/20—Separately-laid insulating layers; Other additional insulating measures; Floating floors for sound insulation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
- F16F15/04—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means
- F16F15/08—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means with rubber springs ; with springs made of rubber and metal
-
- 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
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B9/00—Ceilings; Construction of ceilings, e.g. false ceilings; Ceiling construction with regard to insulation
- E04B9/18—Means for suspending the supporting construction
- E04B2009/186—Means for suspending the supporting construction with arrangements for damping vibration
Abstract
An attenuation device 10 for reducing the acoustic coupling between two surfaces, the device 10 comprises: a housing 20; a foam attenuator 30 and an engagement member 40. Housing 20 comprises sides 22, two upper surfaces 24, 24', and a base 26, and defines a channel 27 dimensioned to receive foam attenuator 30 therein in a close fit. The base 26 of housing 20 is adapted for engagement with a first surface. Foam attenuator 30 comprises a foam body defining a T-shaped slot 32 therein which is dimensioned so as to receive engagement member 40 therein in a close fit. The entrance to slot 32 is define by abutments 34, 34' which project above the planar upper surface of 36 of foam attenuator 30. Engagement member 40 comprises a planar member 42, the upper surface of which is adapted for engagement with a second surface. Engagement member 40 further comprises lower portion 43 for engagement within slot 32 in the foam attenuator 30. Also provided is a method of acoustic coupling between two surfaces.
Description
ATTENUATOR
Background to the invention
The present invention relates to an attenuation device. In particular, the present invention relates to an attenuation device for location between two surfaces to reduce acoustic coupling.
Often existing homes and buildings fall short of ever changing government guidelines on acoustic performance. This is of increasing importance in modern times due to the prevalence of noise in home and office environments due to entertainment systems, televisions, electronic office equipment and the like.
Unfortunately, in order to bring existing buildings up to an acceptable standard it is often necessary to move the occupier out of the building whilst extensive renovation work is undertaken. In flats and apartments, it is often necessary to vacate the occupants from both the upper and lower floors in order to undertake the necessary work to upgrade acoustic performance.
There is therefore a need for a device and method to reduce acoustic coupling between floors of existing buildings with minimal disruption to the occupants
Summary of the Invention
Ti,0 nr000n t n nn ca oUr In n p1,1 mr, tI.,a nm1.,1 a tnt' cif t tin nrnr n ml S 11%., IlL Ill fl.,IILI iJIL.3iiISO tI.J UUUI.3.3 tin., 1J1 tJtJIi.,Il I,? Ill tIn.# 1J1 IJI UI'..
Accordingly, a first aspect of the present invention provides an attenuation device for the reduction of acoustic coupling between two surfaces, the device comprising: a. a housing defining a first channel therethrough, the housing having a base for engagement with a first surface; b. an attenuator located at least in part within the first channel, the attenuator having receiving means adapted to receive a portion of an engagement member therein; and c. an engagement member received within the receiving means, the engagement member adapted to engage with a second surface; such that the engagement member is isolated from the housing by the attenuator.
By isolating the engagement member from the housing, it is possible to isolate the surface to which the engagement member is engaged from the surface to which the housing is engaged. For example, in use the engagement member may be engaged with an existing ceiling surface and the housing member may be engaged with a new ceiling surface. Thus the presence of the attenuation device located between the two results in acoustic decoupling of the two surfaces, thereby reducing airborne and impact noise transmission between the floors separated by the Iwo ceiling surfaces. The present invention achieves this by allowing the two surfaces to move independently of one another and Out of synchronisation, thereby introducing cancellation of the waves caused by air movement and impact to the floor above.
In one embodiment, the receiving means comprises an aperture for receiving at least a portion of the engagement member therein.
TI. . * 1.1.L_. --.---------.-C.._ tIC aperLuic may omrsc ally uitauie Slldi UI UilllClI1UIl dIUjilldLC 101 tue receipt of the engagement means therein. In one embodiment, the aperture comprises a slot. This arrangement ensures that the engagement member is retained in secure engagement with the attenuator.
The slot may be any appropriate shape to receive at least a portion of the engagement means therein. In a preferred embodiment, the slot is substantially T-shaped.
Preferably, the aperture is dimensioned to receive at least a portion of the engagement means in a close fit.
In one embodiment, an abutment is provided along each boundary edge of the attenuator defining the aperture, and preferably, the housing abuts a first surface of the abutment.
Alternatively, or in addition, the engagement means may abut a second opposing surface of the abutment.
The presence of an abutment separating the engagement member from the housing ensures that the engagement member and housing remain out of contact with one another i.e. they remain acoustically isolated from one another.
All or part of the housing and/or engagement member may comprise a metal material, such as an extruded metal material, including but not limited to aluminium. Alternatively, all or part of the housing and/or engagement member may comprise extruded plastic. Alternatively, all or part of the housing and/or engagement member may comprise a pressed or roll formed metal material, including but not limited to aluminium.
A. I..-... .. ....-....-.... .1.-. ___.., ......, c-....., i,.,-.,..
Itt IdL a 1J1.JI LII.JII Ut &lIL UtLt.I1UCILUi IIIay.UI1IJI I3'. UI,, .IUILUU1t.. IUUIII IIIU.,I 1141 nil'.," ii to the skilled person, such as for example closed cell foam material. For example, the attenuator may comprise an extrusion of low density polyethylene optionally with known additives to improve the acoustic properties of the foam material.
The base of the housing may be provided with an irregular surface. Such irregularities may include a pitted or otherwise disrupted surface or may comprise ribs or criss-cross markings or any other suitable irregularities known to the skilled person. Such irregularities have the advantage of ensuring that any screws passing through the ceiling boards and into the housing are not deflected.
A further aspect of the present invention provides a method of reducing acoustic coupling between two surfaces, the method comprising the steps of: a. providing two surfaces; b. providing an attenuation device according to any preceding Claim; c. engaging the engagement means with one of the surfaces; and d. attaching the second surface to the base of the housing.
Brief Description of the Drawings
An embodiment of the invention will now be described, by way of example only, and with reference to the accompanying drawings, in which: Figure 1 is an exploded view of an embodiment of an attenuation device in according with the present invention; Figure 2 is a perspective view from below of the embodiment of figure 1 in an assembled state; Figure 3 is an end view of the embodiment of figure 2; and Figure 4 is a cross-sectional view of a typical floor/ceiling cross-section using standard joists and the embodiment of figure 1 to support a secondary IIII I.
Detailed Description of the Invention
Figures 1 to 3 show an embodiment of an attenuation device in accordance with the present invention.
Attenuation device 10 comprises a housing 20, a foam attenuator 30 and an engagement member 40.
Housing 20 is composed of metal and comprises sides 22, two upper surfaces 24, 24; and a base 26 and defines a channel 27 dimensioned to receive foam attenuator therein in a close fit. The opening to channel 27 is defined by upper surfaces 24,24'.
Foam attenuator 30 comprises a body of closed cell foam defining a T-shaped slot 32 therein which is dimensioned so as to receive engagement member 40 therein in a close fit. The entrance to slot 32 is defined by abutments 34, 34' which project above the substantially planar upper surface 36 of foam attenuator 30.
Engagement member 40 is composed of metal and comprises a substantially planar member 42, the upper surface of which is adapted for engagement with a ceiling structure. Engagement member 40 further comprises lower portion 43 for engagement within slot 32 in foam attenuator 30.
When foam attenuator 30 is received with channel 27 of housing 20. edges 28, 28' of upper surfaces 24, 24' of housing 20 abut respective abutments 34, 34', with abutments 34, 34' projecting above the level of upper surfaces 24, 24'. When engagement member 40 is received within slot 32 of foam attenuator 30, the underside of substantially planar member 42 abuts the edges 38, 38' of abutments 34, 34'.
As abutments 34, 34' of foam attenuator 30 project above the level of upper surfaces 24, 24' of housing 20, there is no contact between engagement member 40 and housing 20 and engagement member 40 and housing 20 are effectively isolated from one another by foam attenuator 30.
Figure 4 shows the attenuation device 10 in use. The floor 100 of upper room 105 is shown separated from the original ceiling boards 110 of lower room 115 by means of standard joists 50. Attenuation device 10 is shown in engagement with original ceiling boards 1110 via engagement member 40 and a new ceiling boards I 20 attached to base 26 of attenuation device 10.
The attenuation devices 10 measuring from 100mm in length ae fixed by means of suitable screws through the original ceiling boards 110 into the floor joists 50 above. The spacing of the attenuator devices 10 is between 300 mm and 450 mm following the line of the floor joists 50. In the transverse direction the spacing of the floor joists 50 themselves can vary from 300 mm to 450 mm from the centre of each joist 50 to the centre of the next floor joist 50.
The base 26 of the housing 20 of attenuation device 10 has a ribbed pattern. This assists in locating the screws that pass through the new ceiling boards 120 and into attenuation device 10 in order to secure the new ceiling boards 120 in place. The ribs also assist in ensuring that the penetration of the screws through the plasterboard of the new ceiling boards 120 is achieved without deflection.
The principle on which the present invention is based is that air pressure waves caused by the compression and decompression of air particles due to speech, movement and actions, and impact due again to movement and actions, cause the floor construction to move in unison repeating the noise, in untreated cases from an upper room through to the room below. The attenuator device of the present nvpnhinn rtc dimner ciiicin the new reiIini now fixed to the underside of
----
the attenuator device to move out of synchronisation with the floor surface above.
This reduces acoustic coupling between the upper room floor and the new ceiling of the lower room, thereby resulting in cancellation of the wave caused by air movement and impact to the floor above.
Although aspects of the invention have been described with reference to the embodiment shown in the accompanying drawings, it is to be understood that the invention is not limited to the precise embodiment shown and that various changes and modifications may be effected without further inventive skill and effort.
Claims (15)
1. An attenuation device for the reduction of acoustic coupling between two surfaces, the device comprising: a. a housing defining a first channel therethrough, the housing having a base for engagement with a first surface; b. an attenuator located at least in part within the first channel, the attenuator having receiving means adapted to receive a portion of an engagement member therein; and c. an engagement member received within the receiving means, the engagement member adapted to engage with a second surface; such that the engagement member is isolated from the housing by the attenuator.
2. An attenuation device according to Claim 1, wherein the receiving means comprises an aperture for receiving at least a portion of the engagement means therein.
3. An attenuation device according to Claim 1 or Claim 2, wherein the aperture comprises a slot.
4. An attenuation device according to Claim 3, wherein the slot is
T
uuLaI&Iiaii y
5. An attenuation device according to any one of Claims 2 to 4, wherein the aperture is dimensioned to receive at least a portion of the engagement means in a close fit.
6. An attenuation device according to any one of Claims 2 to 5, wherein an abutment is provided along each boundary edge of the attenuator defining the aperture.
7. An attenuation device according to Claim 6, wherein the housing abuts a first surface of the abutment.
8. An attenuation device according to Claim 7, wherein the engagement means abuts a second opposing surface of the abutment.
9. An attenuation device according to any preceding Claim, wherein at least a portion of the housing comprises a metal material.
10. An attenuation device according to any preceding Claim, wherein at least a portion of the engagement means comprises a metal material.
11. An attenuation device according to any preceding Claim, wherein at least a portion of the attenuator comprises a foam material.
12. An attenuator device according to Claim 11, wherein the foam material comprises a closed cell foam material.
1 2 /t mhrc ef rIp,rncr *pct, ,.riinIincy hpti,,'a'n tur irfir'p th r""b.. ---. ..
method comprising the steps of: a. providing two surfaces; b. providing an attenuation device according to any preceding Claim; c. engaging the engagement means with one of the surfaces; and d. attaching the second surface to the base of the housing.
14. An attenuation device substantially as hereinbefore described and with reference to the accompanying drawings.
15. A method substantially as hereinbefore described and with reference to the accompanying drawings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB0702870A GB2446640B (en) | 2007-02-14 | 2007-02-14 | Attenuator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB0702870A GB2446640B (en) | 2007-02-14 | 2007-02-14 | Attenuator |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB0702870D0 GB0702870D0 (en) | 2007-03-28 |
| GB2446640A true GB2446640A (en) | 2008-08-20 |
| GB2446640B GB2446640B (en) | 2011-06-01 |
Family
ID=37908630
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB0702870A Expired - Fee Related GB2446640B (en) | 2007-02-14 | 2007-02-14 | Attenuator |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2446640B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105002993B (en) * | 2014-04-21 | 2017-07-21 | 厦门嘉达声学技术有限公司 | Wall shock absorber |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4141528A (en) * | 1977-01-24 | 1979-02-27 | Hilti Aktiengesellschaft | Sound dampening fastening element |
| EP0442243A1 (en) * | 1990-02-13 | 1991-08-21 | Lanz Oensingen Ag | Suspension and assembling device |
| JP2002206302A (en) * | 2001-01-09 | 2002-07-26 | Asahi Kasei Corp | Sound insulating light-weight cellular concrete floor structure |
| EP1744302A2 (en) * | 2005-07-14 | 2007-01-17 | Graham P. Eatwell | Vibration excited sound absorber with dynamic tuning |
-
2007
- 2007-02-14 GB GB0702870A patent/GB2446640B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4141528A (en) * | 1977-01-24 | 1979-02-27 | Hilti Aktiengesellschaft | Sound dampening fastening element |
| EP0442243A1 (en) * | 1990-02-13 | 1991-08-21 | Lanz Oensingen Ag | Suspension and assembling device |
| JP2002206302A (en) * | 2001-01-09 | 2002-07-26 | Asahi Kasei Corp | Sound insulating light-weight cellular concrete floor structure |
| EP1744302A2 (en) * | 2005-07-14 | 2007-01-17 | Graham P. Eatwell | Vibration excited sound absorber with dynamic tuning |
Also Published As
| Publication number | Publication date |
|---|---|
| GB2446640B (en) | 2011-06-01 |
| GB0702870D0 (en) | 2007-03-28 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 20200214 |