GB2026141A - Acoustic damping panel unit - Google Patents
Acoustic damping panel unit Download PDFInfo
- Publication number
- GB2026141A GB2026141A GB7830307A GB7830307A GB2026141A GB 2026141 A GB2026141 A GB 2026141A GB 7830307 A GB7830307 A GB 7830307A GB 7830307 A GB7830307 A GB 7830307A GB 2026141 A GB2026141 A GB 2026141A
- Authority
- GB
- United Kingdom
- Prior art keywords
- panel
- acoustic dampening
- enclosure
- panels
- panel unit
- 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- Withdrawn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
- 238000013016 damping Methods 0.000 title abstract 3
- 239000008187 granular material Substances 0.000 claims abstract description 18
- 238000009432 framing Methods 0.000 claims abstract description 13
- 229910052751 metal Inorganic materials 0.000 claims abstract description 8
- 239000002184 metal Substances 0.000 claims abstract description 8
- 239000000428 dust Substances 0.000 claims abstract description 7
- 239000004033 plastic Substances 0.000 claims abstract description 4
- 229920003023 plastic Polymers 0.000 claims abstract description 4
- 239000011120 plywood Substances 0.000 claims abstract description 4
- 239000010438 granite Substances 0.000 claims abstract description 3
- 239000010454 slate Substances 0.000 claims abstract description 3
- 239000000463 material Substances 0.000 claims description 12
- 239000004411 aluminium Substances 0.000 claims description 9
- 229910052782 aluminium Inorganic materials 0.000 claims description 9
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 9
- 239000002245 particle Substances 0.000 claims description 7
- 238000001816 cooling Methods 0.000 claims description 4
- 239000007779 soft material Substances 0.000 claims description 4
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 2
- 230000002411 adverse Effects 0.000 claims description 2
- 230000004888 barrier function Effects 0.000 claims description 2
- 238000006243 chemical reaction Methods 0.000 claims description 2
- 238000002485 combustion reaction Methods 0.000 claims description 2
- 239000000470 constituent Substances 0.000 claims description 2
- 238000010276 construction Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 claims description 2
- 238000009423 ventilation Methods 0.000 claims description 2
- -1 e.g. Al Substances 0.000 abstract 1
- 239000004579 marble Substances 0.000 abstract 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
- E04B1/84—Sound-absorbing elements
- E04B1/86—Sound-absorbing elements slab-shaped
-
- 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
- E04B1/8218—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 soundproof enclosures
-
- 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
-
- 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
- E04B2001/8433—Tray or frame type panels or blocks, with or without acoustical filling with holes in their face
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Electromagnetism (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Multimedia (AREA)
- Building Environments (AREA)
Abstract
An acoustic damping panel unit (2) has an inner panel (4) and an outer panel (6) held apart by struts, with framing sections (10) connecting the panels (4) and (6) at their top, bottom and side edges to form an enclosed cavity which is filled with granular material (12). Suitable granular materials are slate, granite, flint and marble dusts. The panels (4) and (6) may be of soft metal, e.g. Al, plastics or plywood. One of the panels may be perforated in order to reduce the reflection of incident sound, in which case the panel is lined with a fine mesh so as to retain the dust within the unit. An acoustic damping enclosure may be arranged from a plurality of such panel units arranged around a piece of machinery in such a way as to allow circulation of air between the inside and the outside of the enclosure. <IMAGE>
Description
SPECIFICATION
An acoustic dampening panel unit
The present invention relates to acoustic dampening panel units and to acoustic dampening enclosures constructed from them.
Where noisy apparatus, for example electric generators, pumps or other machines, is used, it is usual to place the machinery in an acoustic dampening enclosure. In this way the level of emitted noise is reduced, and therefore the nuisance to nearby people and the risk of damage to their hearing is reduced also.
A common probiem is that an acoustic dampening enclosure also tends to act as a thermal barrier. A noisy machine within the enclosure which emits heat will cause the surrounding air temperature to rise. As a consequence of this, the operation of the machine may be adversely affected. When an engine is housed in an acoustic dampening enclosure, the movement of air required for both combustion and cooling purposes is restricted.
The efficiency of an acoustic dampening enclosure depends upon the materials from which its constituent panel units are constructed when sound waves impinge upon soft material the particles composing the material begin to vibrate. In this way sound energy is converted to heat energy. This energy conversion process is most efficient when the soft material has a large density. in this contect "soft" means pliable or movable.
According to the present invention there is provided an acoustic dampening panel unit comprising first and second panels, the two panels being arranged to be parallel and spaced apart a predetermined distance from one another; framing sections connecting the first panel to the second panel at their respective outer edges to form an enclosed cavity; and granular material within the cavity.
Preferably the panels have a surface area large in comparison with their thickness, and are made from a pliable material, e.g. soft metal, plastics or plywood.
Preferably the panels are held apart by horizontal struts. The distance between neighbouring struts is preferably sufficiently large to allow flexing of the panels.
In the case where the panel sheets are of metal, the framing sections are preferably also of metal and are spot-welded at the corners.
Preferably the granular material is noncombustible and of high mass per unit volume, e.g.
slate dust, granite dust, flint dust or marble dust.
Preferably the material is composed of particles of differing sizes, so that sound energy of many different frequencies can be absorbed.
According to the present invention there is also provided an acoustic dampening enclosure comprising a plurality of acoustic dampening panel units.
Preferably the acoustic dampening enclosure is constructed so as to allow circulation of air between the inside and the outside of the enclosure.
The present invention will now be described in greater detail by way of examples with reference to the accompanying drawing in which:
Figure 1 is a vertical section of part of a first embodiment of the present invention;
Figure 2 is a vertical section of part of a second embodiment of the present invention;
Figure 3 is a vertical section of an acoustic dampening enclosure surrounding a machine.
An acoustic dampening panel unit is generally designated by the reference numeral 2. In the embodiment of Figure 1 the panel unit 2 has a rectangular inner pannel 4 and a similar outer panel 6. The panels 4 and 6 are made from thin aluminium and are held apart a predetermined distance by struts 8 (one only is shown). Framing sections 10 connect the panels 4 and 6 at their top, bottom and side edges respectively, thus creating an enclosed cavity. The enclosed cavity is filled with noncombustible granular material 12.
In the case where the panels 4 and 6 are made of aluminium, the framing sections 10 are also made of aluminium and are spot welded together at the corners.
Referring to Figure 2; an inner panel 14 is a sheet of aluminium containing many small apertures 16. In order to prevent leakage of small particles of the granular material 12 through the apertures 16, an additional sheet of fine mesh material 18 is provided within the cavity, close to the panel 14. This embodiment reduces the likelihood of reflection of sound energy from the inner panel 14.
Figure 3 shows an acoustic dampening enclosure 20 constructed from panel units 2a to 2c as previously described. Contained within the enclosure 20 is a noisy machine 22. Panel units 2a form the side walls of the enclosure 20. The roof and base of the enclosure are formed by panel units 2b. Further small panel units 2c are positioned at the ends of the panel units 2b to extend inwards so that the path between the inside and the outside of the enclosure 20 is labyranthine. Sound is absorbed by the panel units, but air can still circulate freely around the machine 22.
An acoustic dampening enclosure embodying the invention is of light weight before the granular material is introduced. Therefore enclosures can be cheaply transported to their point of use and then filled with locally obtained granular material.
Moreover, as a result of the labyrinth construction, the enclosure provides good acoustic dampening yet allows an adequate flow of air to the machine 22 for cooling and ventilation purposes.
1. An acoustic dampening panel unit comprising first and second panels, the two panels being arranged to be parallel and spaced apart a predetermined distance from one another; framing sections connecting the first panel to the second panel at their respective outer edges to form an enclosed cavity; and granular material within the cavity.
2. An acoustic dampening panel unit according to claim 1, wherein the panels have a surface area large in comparison with their thickness, and are made from a pliable material.
**WARNING** end of DESC field may overlap start of CLMS **.
Claims (12)
1. An acoustic dampening panel unit comprising first and second panels, the two panels being arranged to be parallel and spaced apart a predetermined distance from one another; framing sections connecting the first panel to the second panel at their respective outer edges to form an enclosed cavity; and granular material within the cavity.
2. An acoustic dampening panel unit according to claim 1, wherein the panels have a surface area large in comparison with their thickness, and are made from a pliable material.
3. An acoustics dampening panel unit according to claim 2, wherein the panels are made of soft metal, plastics or plywood.
4. An acoustic dampening panel unit according to any one of the preceding claims, wherein the panels are held apart by horizontal struts.
5. An acoustic dampening panel unit according to claim 4, wherein the distance between neighbouring struts is sufficiently largeto allow flexing of the panels.
6. An acoustic dampening panel unit, wherein the panels and framing sections are made of aluminium, the framing sections being spot welded to the panels at the corners.
7. An acoustic dampening panel unit according to any one of the preceding claims, wherein the granular material is non-combustible and of high mass per unit volume.
8. An acoustic dampening panel unit according to claim 7, wherein said granular material is composed of particles of differing sizes.
9. An acoustic dampening enclosure comprisng a plurality of acoustic dampening panel units according to any one of the preceding claims.
10. An acoustic dampening enclosure according to claim 9, wherein said units are arranged so as to allow circulation of air between the inside and the outside of the enclosure.
11. An acoustic dampening panel unit constructed substantially as herein described with reference to and as illustrated in Figure 1 or Figure 2 of the accompanying drawing.
12. An acoustic dampening enclosure having a plurality of panel units arranged substantially as herein described with reference to and as illustrated in Figure 3 of the accompanying drawing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB7830307A GB2026141A (en) | 1978-07-19 | 1978-07-19 | Acoustic damping panel unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB7830307A GB2026141A (en) | 1978-07-19 | 1978-07-19 | Acoustic damping panel unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB2026141A true GB2026141A (en) | 1980-01-30 |
Family
ID=10498508
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB7830307A Withdrawn GB2026141A (en) | 1978-07-19 | 1978-07-19 | Acoustic damping panel unit |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2026141A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2269988B (en) * | 1992-08-24 | 1996-04-24 | Frederick Yik Shiong Kwoh | Acoustic damping device |
| ITBO20110196A1 (en) * | 2011-04-14 | 2012-10-15 | Avanthia S R L | THE ENVELOPE OF DEVICES IN THE TYPE OF ELECTRIC GROUPS, ENDOTHERMAL ENGINES AIR COMPRESSORS AND SIMILAR FOR HIGH ACOUSTIC INSULATION |
| FR3042244A1 (en) * | 2015-10-08 | 2017-04-14 | Seven Audio | DEVICE FOR DAMPING MICRO-VIBRATIONS, IN PARTICULAR IN AUDIO BROADCASTING DEVICES |
| FR3120080A3 (en) * | 2021-02-19 | 2022-08-26 | Editions Evenements Et Tendances | Isolation device for electoral ballot |
-
1978
- 1978-07-19 GB GB7830307A patent/GB2026141A/en not_active Withdrawn
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2269988B (en) * | 1992-08-24 | 1996-04-24 | Frederick Yik Shiong Kwoh | Acoustic damping device |
| ITBO20110196A1 (en) * | 2011-04-14 | 2012-10-15 | Avanthia S R L | THE ENVELOPE OF DEVICES IN THE TYPE OF ELECTRIC GROUPS, ENDOTHERMAL ENGINES AIR COMPRESSORS AND SIMILAR FOR HIGH ACOUSTIC INSULATION |
| WO2012140590A3 (en) * | 2011-04-14 | 2013-06-20 | Avanthia S.R.L. | Enclosure for devices of the type of electric power generating sets, internal combustion engines, air compressors and the like with high acoustic insulation |
| FR3042244A1 (en) * | 2015-10-08 | 2017-04-14 | Seven Audio | DEVICE FOR DAMPING MICRO-VIBRATIONS, IN PARTICULAR IN AUDIO BROADCASTING DEVICES |
| FR3120080A3 (en) * | 2021-02-19 | 2022-08-26 | Editions Evenements Et Tendances | Isolation device for electoral ballot |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |