ACOUSTIC SHIELD

• US 20110139542A1
• Filed: 05/21/2007
• Published: 06/16/2011
• Est. Priority Date: 05/23/2006
• Status: Abandoned Application

• Current Assignee: Bellmax Acoustic Pty Ltd
• Original Assignee: Bellmax Acoustic Pty Ltd
• Inventors: Borroni, Mark
• Application Number:
  US12/301,912
• Publication Number:
  US 20110139542A1
• Time in Patent Office: Days
• US Class Current: 181/290
• CPC Class Codes: B32B 11/00 Layered products comprising a layer of bituminous or tarry substances
• CPC Class Codes: B32B 11/10 next to a fibrous or filamentary layer
• CPC Class Codes: B32B 15/08 of synthetic resin
• CPC Class Codes: B32B 15/14 next to a fibrous or filamentary layer
• CPC Class Codes: B32B 15/20 comprising aluminium or copper B32B15/016 and B32B15/017 take precedence
• CPC Class Codes: B32B 2262/0276 Polyester fibres
• CPC Class Codes: B32B 2307/102 Insulating
• CPC Class Codes: B32B 2307/51 Elastic
• CPC Class Codes: B32B 2307/56 Damping, energy absorption
• CPC Class Codes: B32B 2307/718 Weight, e.g. weight per square meter
• CPC Class Codes: B32B 25/10 next to a fibrous or filamentary layer
• CPC Class Codes: B32B 2605/003 Interior finishings
• CPC Class Codes: B32B 27/12 next to a fibrous or filamentary layer
• CPC Class Codes: B32B 27/306 comprising vinyl acetate or vinyl alcohol (co)polymers
• CPC Class Codes: B32B 3/00 Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
• CPC Class Codes: B32B 3/266 characterised by an apertured layer, the apertures going through the whole thickness of the layer, e.g. expanded metal, perforated layer, slit layer regular cells B32B3/12
• CPC Class Codes: B32B 5/022 Non-woven fabric
• CPC Class Codes: B32B 7/022 Mechanical properties
• CPC Class Codes: B60R 13/0861 for covering undersurfaces of vehicles, e.g. wheel houses
• CPC Class Codes: B60R 13/0876 for mounting around heat sources, e.g. exhaust pipes
• CPC Class Codes: B60R 13/0884 : for mounting around noise sources, e.g. air blowers
• CPC Class Codes: G10K 11/168 : Plural layers of different materials, e.g. sandwiches

Abstract

A multilayered acoustic shield (1) for mounting to a panel of a vehicle, the shield (1) including an outer portion and an inner portion, the outer portion including a support layer (5) having apertures (6) therein, the inner portion including a sound-absorbing layer (9) and a vibration-dampening layer (11), wherein the shield (1) is fastenable to the panel of the vehicle such that at least a portion of the dampening layer (11) engages the panel with the sound-absorbing layer (9) being compressed between the outer portion and the dampening layer (11), to thereby reduce the transmission of noise into a cabin of the vehicle.

Claims

1. A multilayered acoustic shield for mounting to a panel of a vehicle, the shield including an outer portion and an inner portion, the outer portion including a support layer having apertures therein, the inner portion including a sound-absorbing layer and a vibration-dampening layer, wherein the shield is fastenable to the panel of the vehicle such that at least a portion of the dampening layer engages the panel with the sound-absorbing layer being compressed between the outer portion and the dampening layer, to thereby reduce the transmission of noise into a cabin of the vehicle.

2. A multilayered acoustic shield as claimed in claim 1 wherein the outer portion further includes a metallic foil located between the support layer and the sound-absorbing layer.

3. A multilayered acoustic shield as claimed in claim 1 wherein the dampening layer is made of a viscoelastic material.

4. A multilayered acoustic shield as claimed in claim 3 wherein the dampening layer is moulded to conform with a curvature of the panel.

5. A multilayered acoustic shield as claimed in claim 2 wherein the support layer includes a plurality of indentations therein.

6. A multilayered acoustic shield as claimed in claim 5 wherein at least one of the indentations includes an aperture therein and sidewalls which converge towards the aperture.

7. A multilayered acoustic shield as claimed in claim 6 wherein the sidewalls provide a continuous curved surface extending around the aperture.

8. A multilayered acoustic shield as claimed in claim 5 wherein a multiple number of the indentations each include an aperture and sidewalls which converge towards their respective aperture.

9. A multilayered acoustic shield as claimed in claim 8 wherein in use a multiple number of the apertures abut with an adjoining layer of the acoustic shield to thereby guide sound waves incident on the sidewalls through the apertures towards the adjoining layer.

10. A multilayered acoustic shield as claimed in claim 8 wherein the sidewalls of adjoining indentations converge towards one another.

11. A multilayered acoustic shield as claimed in claim 10 wherein a cavity is formed between the sidewalls of adjoining indentations and the adjoining layer of the acoustic shield.

13. A multilayered acoustic shield as claimed in claim 9 wherein the adjoining layer is the metallic foil.

14. A multilayered acoustic shield as claimed in claim 9 wherein the adjoining layer is the sound-absorbing layer.

15. A multilayered acoustic shield as claimed in claim 1 wherein the support layer is a sheet of rigid material.

16. A multilayered acoustic shield as claimed in claim 2 wherein the metallic foil has perforations therein.

12. (canceled)

17. A multilayered acoustic shield for mounting to an underside of a transmission tunnel in a vehicle floorpan, the shield including an outer portion and an inner portion, the outer portion including a support layer having apertures therein, the inner portion including a sound-absorbing layer and a vibration-dampening layer, wherein the shield is fastenable to the vehicle floorpan such that at least a portion of the dampening layer engages with the underside of the transmission tunnel with the sound-absorbing layer being compressed between the outer portion and the dampening layer, to thereby reduce the transmission of noise into a cabin of the vehicle.

18. A multilayered acoustic shield as claimed in claim 17 wherein the outer portion further includes a metallic foil located between the support layer and the sound-absorbing layer.

19. A multilayered acoustic shield as claimed in claim 17 wherein the dampening layer is made of a viscoelastic material.

20. A multilayered acoustic shield as claimed in claim 19 wherein the dampening layer is moulded to conform with a curvature of the transmission tunnel.

21. A multilayered acoustic shield as claimed in claim 18 wherein the support layer includes a plurality of indentations therein.

22. A multilayered acoustic shield as claimed in claim 21 wherein at least one of the indentations includes an aperture therein and sidewalls which converge towards the aperture.

23. A multilayered acoustic shield as claimed in claim 22 wherein the sidewalls provide a continuous curved surface extending around the aperture.

24. A multilayered acoustic shield as claimed in claim 21 wherein a multiple number of the indentations each include an aperture and sidewalls which converge towards their respective aperture.

25. A multilayered acoustic shield as claimed in claim 24 wherein in use a multiple number of the apertures abut with an adjoining layer of the acoustic shield to thereby guide sound waves incident on the sidewalls through the apertures towards the adjoining layer.

26. A multilayered acoustic shield as claimed in claim 24 wherein the sidewalls of adjoining indentations converge towards one another.

27. A multilayered acoustic shield as claimed in claim 26 wherein a cavity is formed between the sidewalls of adjoining indentations and the adjoining layer of the acoustic shield.

29. A multilayered acoustic shield as claimed in claim 25 wherein the adjoining layer is the metallic foil.

30. A multilayered acoustic shield as claimed in claim 25 wherein the adjoining layer is the sound-absorbing layer.

32. A multilayered acoustic shield as claimed in claim 18 wherein the metallic foil has perforations therein.

28. (canceled)

31. (canceled)

33. (canceled)