Noise protection

Abstract

Noise barriers for roads or railways comprise a sound absorbent 20 that is produced from a rubber granulate which is bonded together with the help of a bonding agent, comprising a sound-reflecting framework 10 produced from a material that is harder than the material in the sound absorbent 20 . The framework 10 is fully or partially covered with the sound absorbent 20 on one side that is intended to face towards the source of the sound. The actual rubber mass is partially moulded into the framework and is provided on the outside towards the source of the sound with a mesh to prevent the moulded rubber from becoming detached. The framework 10 exhibits an upper portion 13 , to which can be applied a screen 33 , a sole portion 11 and a back portion 12 , on which the sound absorbent 20 is so arranged that the sound absorbent is enclosed by an upper portion, back portion, sole portion and has a side intended to face towards the road, see FIGS. 1, 2 and 3.

1 . Noise barrier for positioning next to a road or railway comprising a sound-reflecting framework ( 10 ) and a sound absorbent ( 20 ) made of rubber granulate mixed with a bonding agent, whereby the framework comprises an upper portion ( 13 ), a sole portion ( 11 ) and a back portion ( 12 ), against which the sound absorbent is applied so that the sound absorbent is surrounded by the upper portion, the back portion and the sole portion, and has a side intended to face towards the road or the railway, characterized in that the sound absorbent is partially moulded into the framework.  
   
   
       2 . The noise protection in accordance with  claim 1  wherein a mesh element ( 36 ) is arranged next to the sound absorbent on the side facing towards the road or the railway.  
   
   
       3 . Method for producing a noise barrier, intended for placing next to a road or a railway, the noise barrier comprising a sound reflecting framework ( 10 ) comprising an upper portion ( 13 ), a sole portion ( 11 ) and a back portion ( 12 ), and a sound absorbent ( 20 ) of a rubber granulate mixed with a bonding agent, the method includes applying the sound absorbent so that the sound absorbent is surrounded by the upper portion, the back portion and the sole portion and has a side intended to face towards the road or railway characterised in moulding the sound absorbent partially into the framework.  
   
   
       4 . Method for producing a noise barrier as in  claim 3 , including arranging a mesh element ( 36 ) on the side intended to face towards the road or the railway.  
   
   
       5 . Method for producing a noise barrier in accordance with  claim 4 , including partially moulding the mesh element into the framework.