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1. WO2020115004 - UNITÉ DE COMMANDE DE BRUIT D'INTERFÉRENCE

Note: Texte fondé sur des processus automatiques de reconnaissance optique de caractères. Seule la version PDF a une valeur juridique

[ EN ]

CLAIMS

1. An interference noise-control unit, for installation on a sound arresting wall for reducing noise from trains, comprising:

a housing to be secured on a sound arresting wall, wherein the housing comprises a hollow compartment comprising at least one first channel and at least one second channel, wherein

said first channel has a first channel height A and a first channel length B, and wherein

said second channel has a second channel height A’ and a second channel length B’, and wherein said first channel height A is different from said second channel height A’.

2. An interference noise-control unit according to claim 1 , wherein said first channel height A is larger than said second channel height A’ and wherein said first channel length B is larger than said second channel length B’.

3. An interference noise-control unit according to any one of claims 1 -2, further comprising a third channel having a third channel height A” which is equal to or smaller than said second channel height A’ and a third channel length B” which is equal to or smaller than said second channel length B’.

4. An interference noise-control unit according to claim 3, wherein said first channel height A is between 80-100 mm, said second channel height A’ is between 50-70 mm, and said third channel height A” is between 30-50 mm.

5. An interference noise-control unit according to any one of claims 1 -4, wherein said first channel length B is between 0.08-1.1 m and wherein said second channel length B’ is between 0.05-0.8 m.

6. An interference noise-control unit according to any one of claims 1 - 5, wherein the inlet height of said interference noise-control unit is between 100-300 mm, and preferably 200 mm.

7. An interference noise-control unit according to any one of claims 1 - 6, wherein the total number of channels are 3-4.

8. An interference noise-control unit according to any one of claims 1 - 7, wherein said second channel is located on top of said first channel.

9. An interference noise-control unit according to any one of claims 3- 8, wherein the relationship between said first channel height A and said second channel height A’ and optionally also the relationship between said second channel height A’ to said third channel height A”, is in the interval of

I .1 -3.0, and preferably 1.5.

10. An interference noise-control unit according to any one of claims 1 - 9, wherein said channels are bent and having one essentially vertical length portion with an opening facing the noise source and one essentially horizontal length portion.

11. An interference noise-control unit according to any one of claims 1 -9, wherein said channels are essentially straight and vertically directed.

12. An interference noise-control unit according to any one of claims 1 - I I , wherein said housing comprises a case and an insert, said insert comprising a plurality of baffles forming said channels.

13. A process for making an interference noise-control unit, comprising the steps of:

extruding a case,

injection moulding an insert,

mounting said case on a sound arresting wall, and mounting said insert to said case.