GB2488134A

GB2488134A - Acoustic wall lining

Info

Publication number: GB2488134A
Application number: GB201102732A
Authority: GB
Inventors: Andrew Fry
Original assignee: CELLECTA Ltd
Current assignee: CELLECTA Ltd
Priority date: 2011-02-16
Filing date: 2011-02-16
Publication date: 2012-08-22
Anticipated expiration: 2031-02-16
Also published as: GB201102732D0; GB2488134B

Abstract

An acoustic lining for a wall (1) comprises one or more acoustic lining boards (21) attached to the wall (1) by means of acoustic baffles (3), the baffles comprising a pair of vertically arranged baffles (9, 11) extending from floor (5) to ceiling (7) with an end baffle at each end of the wall and a pair of horizontally arranged baffles (13, 15), one (13 at the wall head and one (15) at the wall base. The end baffles (9, 11) and the horizontally arranged baffles (13, 15) forming with the wall (1) and the acoustic lining boards (21) a substantially enclosed chamber, The acoustic lining boards (21) are fastened to the baffles (3) and the baffles (3) are fastened to the wall (1) by sound damping means (45).

Description

t V.' INTELLECTUAL ..* PROPERTY OFFICE Application No. GB 1102732.3 RTIVI Date:15 June 2011 The following terms are registered trademarks and should be read as such wherever they occur in this document: HiGYP FIBREfon Intellectual Properly Office is an operating name of the Patent Office www.ipo.gov.uk

ACOUSTIC LINING

This invention relates to an acoustic lining.

A number of companies manufacture acoustic lining boards which comprise a layer of sound absorbing material bonded to a facing sheet such as plasterboard or plywood. This composite board is then fixed to the wall they are to line in various ways, such as:-a) A gypsum adhesive is applied to the wall in dabs and the board is then pressed against the adhesive dabs leaving a small air gap between the board and the wall. There is also a continuous strip of adhesive at the head and base of the wall and where walls abut each other to avoid acoustic flanking or sound leakage. This method has the disadvantage that a large amount of sound, transmitted through the acoustic board will be transmitted into the wall by the gypsum adhesive over the large contact area thereof and the fact that it is not resilient..

b) A number of vertical timber battens are attached to the wall and then the lining board is fixed to the battens. This method has the disadvantage that sound is transmitted through the lining board to the batten and then through the batten into the wall through the fixings.

c) A resilient metal bar is fixed to the wall and the lining board is carried by the eo..

* metal bar. This does to some extent decouple the lining board from the wall but a certain amount of sound is transmitted through board and the metal bar.

d) The lining board is fixed directly to the wall with mechanical fixings. Here, there is effectively no gap so that sound can be transmitted from the lining board to the wall and there is a particularly good transmission through the mechanical fixings.

e) A final method completely isolates the lining board from the wall by mounting it on an independent metal frame which is set off from the wall. This method is very effective but it is expensive and the overall thickness is in excess of 100 mm and thus reduces room size. It also needs to be filled by specialists.

One of the most serious disadvantages of these various systems is that acoustic flanking or sound leakage takes place around the ends of the lining board. Another disadvantage, where there is an air gap, is that there are volumes of air which can resonate and increase the effect of the transmitted sound.

The present invention seeks to provide an acoustic lining in which some or all of the above disadvantages are reduced or avoided.

According to the invention, there is provided an acoustic lining for a wall comprising one or more acoustic lining boards attached to the wall by means of acoustic baffles, the baffles comprising a pair of vertically arranged baffles extending from floor to ceiling with an end baffle at each end of the wall and a pair of horizontally arranged baffles, one at the wall head and one at the wall base, the end baffles and the horizontally arranged baffles forming with the wall and the acoustic lining boards a substantially enclosed chamber, the acoustic lining boards being fastened to the baffles and the baffles being fastened to the wall by sound damping means.

Preferably the acoustic lining boards comprise a layer of sound absorbing material bonded to a facing sheet.

The layer of sound absorbing material may comprise high density wood fibre board. The facing sheet may be plasterboard or plywood. S. * *

* The substantially enclosed chamber may be subdivided by further baffles which extend vertically, horizontally or diagonally or a combination of these.

The sound damping means for attaching the baffles to the wall may comprise an acoustic mastic.

The sound damping means for attaching the lining boards to the baffles may comprise a mechanical resilient fixing. The mechanical resilient fixing may comprise an outer acoustic sheath and an inner screw, bolt or pin. The outer acoustic sheath may be made of rubber while the inner screw, bolt or pin may be made of metal or plastics.

The mechanical resilient fixing may pass through the lining board, through the baffle and into the wall.

Alternatively the sound damping means for attaching the lining boards to the baffles may comprise an acoustic mastic.

The invention will now be described in greater detail, by way of example, with reference to the drawings, in which:-Figure 1 is a diagrammatic front view of a wall showing the arrangement of support baffles in accordance with the invention; Figure 2 is a vertical sectional view through a lined masonry wall showing the lower and upper ends of a lined wall in accordance with a first embodiments of the invention; Figure 3 is an horizontal sectional view of the lined masonry wall shown in figure 2; *. ..

* * Figure 4 is an enlarged part horizontal sectional view of the connection between two adjacent lining boards on the lined masonry wall of figures 2 and ** ci. * S * S..

Figure 5 is a vertical sectional view through a lined masonry wall showing the lower and upper ends of a lined wall in accordance with a first embodiments of the invention; Figure 6 is an horizontal sectional view of the lined masonry wall shown in figure 5; Figure 7 is an enlarged part horizontal sectional view of the connection between two adjacent lining boards on the lined masonry wall of figures 5 and 6, and Figure 8 is an enlarged partial perspective view with the lining board removed showing how utilities can be use with the lined walls.

Referring firstly to figure 1, there is shown the face of a wall I onto which are attached acoustic or sound absorbing baffles 3 which are stuck to the wall with an acoustic mastic such as that sold under the name Grabfon adhesive.

The location of this mastic can be seen in the enlarged sections in figures 4 and 7 at 4. The baffles comprise a plurality of vertically arranged baffles extending from floor 5 to ceiling 7 with an end baffle 9 and 11, one at each end of the wall and a pair of horizontally arranged baffles 13, 15, one 13 at the wall head and one 15 at the wall base. As will be seen, the end baffles 9 and 11 and the horizontally arranged baffles 13 and 15 forming with the wall I and the acoustic lining boards 21 (shown in figures 2 to 7) a substantially enclosed chamber. This enclosed chamber is subdivided by a number of further baffles 3, generally extending in a vertical direction. Where the wall I is required to carry heavy items, such as a television or kitchen units, further baffles 3, this *..: time horizontal and shown at 17, may provide further strengthening of the acoustic lining. The baffles 3 are made of high density wood fibre board and may be baffles sold under the name FIBREfon.

Figures 2, 3 and 4 show sectional views of lined walls in accordance with a first embodiment of the invention. Here the wall shown is a cavity wall 31 having an inner masonry skin 33 of brick, aircrete or aggregate blocks, a cavity 35 (as shown filled with insulation 36) and an outer skin 37 which, depending on the nature of the wall 31 may be an outer masonry skin if it is an outer wall or an inner masonry or other skin if it is a dividing wall. Baffles 3 are stuck onto the face of the wall in the pattern shown in figure 1. The baffles are suitably 75 mm wide and 20 mm thick so that the acoustic lining boards 21 are spaced by 20 mm from the wall surface so as to provide a void which can be used to house services as wilt be described hereafter in connection with figure 8. Suitably the baffles are provided in 1200 mm lengths. The baffles could be tongued and grooved at their connected ends or could be square butted or have shiplap ends and be overlapped. The acoustic lining boards 21 suitably comprise layer 41 of sound absorbing material such as high density wood fibre board, bonded to a facing sheet 43 such as plasterboard or plywood and may be an acoustic lining board sold under the name FtBREfon HIGYP.

The acoustic boards 21 are attached through the baffles 3 to the wall by means of a special fixing arrangement 45 which can be best seen in figure 4.

Thus, the fixing 45 comprises an outer acoustic sheath 47 made of rubber and an inner metal or plastics screw, bolt or pin 49. As can be seen, the outer sheath 47 is moulded to fit completely around the screw, bolt or pin 49 so that there is no contact between the screw or bolt 49 and the lining board 21, the baffle 3 or the wall itself The inner end of the sheath 47 is split so that the screwing in or pushing in of the screw, bolt or pin 49 will force the end apart and so anchor the fixing arrangement 45 in the manner of a walt plug.

As can also be seen, the baffles 3 are located at the joints of the lining boards 21 and the fixing arrangement 45 passes through the joints. As shown in *:.** figure 4, the lining boards 21 have their layers 41 tongued and grooved as can be seen at 51 but they could be square butted or have shiplap ends and be overlapped. * * . S *

Figure 2 shows how the lining boards 21 are sealed to the floor 53, which itself may be treated for sound insulation by means of a flanking strip 55, but this forms no part of the invention Also shown in figure 2 is the sealing of the lining boards 21 to the ceiling 57 which, in this case, is formed as the underside of the floor 53. Here, an insulating ceiling treatment 59 is provided but this again forms no part of the invention as such.

Figure 3 shows how the lining boards 21 abut at a corner as shown at 61.

Figures 5,6 and 7 show sectional views, similar to figures 2, 3 and 4, of lined walls in accordance with a second embodiment of the invention. Here again the wall shown is a cavity wall 31 having an inner masonry skin 33 of brick, aircrete or aggregate blocks, a cavity 35 (as shown half filled with insulation 36) and an outer skin 37 which, depending on the nature of the wall 31 may be an outer masonry skin if it is an outer wall or an inner masonry or other skin if it is a dividing wall. Baffles 3 are stuck onto the face of the wall in the pattern shown in figure 1. The baffles are suitably 75 mm wide and 20 mm thick so that the acoustic lining boards 21 are spaced by 20 mm from the wall surface so as to provide a void which can be used to house services as will be described hereafter in connection with figure 8. Suitably the baffles are provided in 1200 mm lengths. The baffles could be tongued and grooved at their connected ends or could be square butted or have shiplap ends and be overlapped. The acoustic lining boards 21 as in the first embodiment, suitably comprise layer 41 of sound absorbing material such as high density wood fibre board, bonded to a facing sheet 43 such as plasterboard or plywood and may be an acoustic lining board sold under the name FIBREfon HIGYP.

The acoustic boards 21 are, in this embodiment, attached to the baffles 3 by means of an acoustic mastic (see 50 in figure 7) such as that sold under the name Grabfon adhesive. In this way there is no contact with the surface of the *...: wall other than through the baffles 3. * 000

* As can also be seen, the baffles 3 are located at the joints of the lining boards S. *s * * 21. As shown in figure 7, the lining boards 21 have their layers 41 tongued and grooved as can be seen at 51 but they could be square butted or have shiplap ends and be overlapped.

Figure 5 shows how the lining boards 21 are sealed to the floor 53, which itself may be treated for sound insulation by means of a flanking strip 55, but this forms no part of the invention Also shown in figure 2 is the sealing of the lining boards 21 to the ceiling 57 which, in this case, is formed as the underside of the floor 53. Here, an insulating ceiling treatment 59 is provided but this again forms no part of the invention as such.

Figure 6 shows how the lining boards 21 abut at a corner as shown at 61.

Figure 8 shows how utilities can make use of the 20 mm gap behind the lining boards. Figure 8 shows a small section of wall at a corner 61 with end baffle 9 and wall base baffle 15. An electrical outlet box 63 for the attachment, for example, of an electrical socket, is shown attached to the wall skin 33, suitably by screws (not shown). The cable 65 leading thereto extends along the wall skin until it reaches the baffle 9. The baffle 9 is cut away at 67 to, allow passage of the cable and the cut away part is then filled with acoustic mastic 69. The lining board (not shown here) is apertured where it fits above the outlet box 63 so as to allow access by the electrical socket.

It will be appreciated that additions to or modifications of the above described embodiments may be made without departing from the scope of the invention as defined by the claims. For example, the baffles 3, instead of being stuck to the wall by acoustic mastic, could be stuck with any other suitable adhesive or using a suitable form of mechanical fixing. If desired, the baffles may extend diagonally within the chamber instead of vertically and/or horizontally.

Combinations of diagonal, vertical and horizontal baffles could be used, always provided that the vertical and horizontal baffles making the top, bottom and sides of the chamber are maintained. * * *

Instead of the use of wood fibre board, the baffles and the sound absorbing * layer of the lining boards could be made of strips of mineral wool, cellulose board, low density polyethylene, open cell polyurethane, polyester fibre, rubber or any other suitable sound absorbing material. The spacing of the lining board from the wall can vary from 1 mm upwards and does not need to be 20 mm although this, in many ways, produces the most suitable result. The baffles may be provided in any suitable lengths from 10 mm to 10 m. Instead of being 75 mm wide, they could be from 10 mm to 200 mm wide The rubber outer sheath of the fixing in the first embodiment could be made of wood, plastics or any suitable other resilient material. Ste* * *

S

S..... S * S. ** * I I * . I. * . I *5.

Claims

CLAIMS:- 1. An acoustic lining for a wall comprising one or more acoustic lining boards attached to the wall by means of acoustic baffles, the baffles comprising a pair of vertically arranged baffles extending from floor to ceiling with an end baffle at each end of the wall and a pair of horizontally arranged baffles, one at the wall head and one at the wall base, the end baffles and the horizontally arranged baffles forming with the wall and the acoustic lining boards a substantially enclosed chamber, the acoustic lining boards being fastened to the baffles and the baffles being fastened to the wall by sound damping means.
2. A lining as claimed in claim 1, wherein the baffles are strips made of high density wood fibre board.
3. A lining as claimed in claim I or 2, wherein the acoustic lining boards comprise a layer of sound absorbing material bonded to a facing sheet.
4. A lining as claimed in claim 3 wherein the layer of sound absorbing material comprises high density wood fibre board.
5. A lining as claimed in claim 3 or 4, wherein the facing sheet is plasterboard. S....
6. A lining as claimed in claim 3 or 4, wherein the facing sheet is plywood. S. **

*
7. A lining as claimed in any preceding claim, wherein the substantially enclosed chamber is subdivided by further baffles which extend vertically, horizontally or diagonally or a combination of these.
8. A lining as claimed in any preceding claim wherein the sound damping means for attaching the baffles to the wall comprise an acoustic mastic.
9. A lining as claimed in any preceding claim wherein the sound damping means for attaching the lining boards to the baffles comprise a mechanical resilient fixing.
10. A lining as claimed in claim 9 wherein the mechanical resilient fixing comprises an outer acoustic sheath and an inner screw, bolt or pin.
11. A lining as claimed in claim 10, wherein the outer acoustic sheath is made of rubber.
12. A lining as claimed in claim 10 or 11, wherein the inner screw, bolt or pin is made of metal or plastics.
13. A lining as claimed in any one of claims 9 to 12, wherein the mechanical resilient fixing passes through the lining board, through the baffle and into the wall.

14 A Jining as claimed in any one of claims I to 8 wherein the sound damping means for attaching the lining boards to the baffles comprise an acoustic mastic.An acoustic lining substantially as described herein with reference to the drawings.S..... * .*S* S fl ** *. * . S * .U * S *Amendments to the claims have been filed as follows CLAIMS:- 1. An acoustic lining for a wall comprising one or more acoustic lining boards attached to the wall by means of acoustic sound absorbing baffles, the baffles comprising a pair of verlically arranged baffles extending from floor to ceiling with an end baffle at each end of the wall and a pair of horizontally arranged baffles, one at the wall head and one at the wall base, the end baffles and the horizontally arranged baffles forming with the wall and the acoustic lining boards a substantially enclosed chamber, the acoustic lining boards being fastened either to or through the baffles and the baffles being fastened to the wall by sound damping means.2. A lining as claimed in claim I wherein the baffles comprise strips of a single material.3. A lining as claimed in claim I or 2, wherein the baffles are strips made of high density wood fibre board.4. A lining as claimed in claim I or 2, wherein the baffles are strips made of a material selected from mineral wool, cellulose board, low density polyethylene, open cell polyurethane, polyester fibre and rubber 5. A lining as claimed in any preceding claim, wherein the acoustic lining boards comprise a layer of sound absorbing material bonded to a facing sheet.6. A lining as claimed in claim 5 wherein the layer of sound absorbing material comprises high density wood fibre board. S. * * . S* 7. A lining as claimed in claim 5 or 6, wherein the facing sheet is plasterboard. * S. * . S * S.*. 8 A lining as claimed in claim 5 or 6, wherein the facing sheet is plywood.9. A lining as claimed in any preceding claim, wherein the substantially enclosed chamber is subdivided by further baffles which extend vertically, horizontally or diagonally or a combination of these.10. A lining as claimed in any preceding claim wherein the sound damping means for attaching the baffles to the wall comprise an acoustic mastic.11. A lining as claimed in any preceding claim wherein the sound damping means for attaching the lining boards to the baffles comprise a mechanical resilient fixing.12. A lining as claimed in claim 11 wherein the mechanical resilient fixing comprises an outer acoustic sheath and an inner screw, bolt or pin.13. A lining as claimed in claim 12, wherein the outer acoustic sheath is made of rubber.
14. A lining as claimed in claim 12 or 13, wherein the inner screw, bolt or pin is made of metal or plastics.
15. A lining as claimed in any one of claims 11 to 14, wherein the mechanical resilient fixing passes through the lining board, through the baffle and into the wall.16 A lining as claimed in any one of claims 1 to 10 wherein the sound damping means for attaching the lining boards to the baffles comprise an acoustic mastic.S17 An acoustic lining substantially as described herein with reference to * S * the drawings. * 0 * * S * 0 * SI