Our association has just installed a noise barrier 2m by 300m (23cm thick concrete blocks with millstone facing), but we have not noticed any reduction in noise. Was 2m high enough? Do you have any recommendations?
Full Question :
Hello, we have just been built a noise barrier 2 m high by 300 m in parpains 23 cm thick including a millstone facing this wall is supposed to protect pavilions on the edge of the NATIONALE 10 to 78 TRAPPES borrowed every day by 80,000 vehicles, 40% of which are heavy goods vehicles We have not noticed any reduction in noise. The public authorities say yes, for us, 2 m high is not enough. What do you think?
The height of 2 m for the screen would be sufficient if it is very close to the origin of the noise. otherwise it is useless. To know the incidence of protection, draw a straight line from the origin of the noise passing just above the noise barrier and you will see if you are protected
www.gabions.fr gives a lot of information in the noise barrier section
Without the technical elements: noise source, target, distance, acoustic measurements, impossible to answer the question... You don't notice any variation, but what does the sound level meter say? What was the objective? It is impossible to answer this question without carrying out a study.
Who was the contracting authority, the DDTM? I imagine that they had to do the study and the dimensioning of the wall. The study must be available. It is then enough to compare the provisional acoustic note and the reality to see if everything is in conformity.
