Question about a comparison with CADNAA

[AmandineHJ]

Hi !

NoiseModelling version
I'm using NoiseModelling 4.0.4.

Describe the bug
I am trying to compare CADNAA and NoiseModelling results. I am working on a small file with only one road and one building and the results seems to be different with the same calculation mode (CNOSSOS EU). There is a difference about 6 dB(A) almost everywhere as you can see in the pictures :

Results from CADNAA Results from NoiseModelling Comparison of the results

Geoserver log
geoserver.log

Do you have any idea why there is a such difference ? I have did research but I don't find why I have this difference. Maybe I did something wrong in my NoiseModelling parameters ? The two models have the same parameters (including maximum source-receiver distance).

Thank you for you reply,
Best Regards,
Amandine

[pierromond]

Hi Amandine,

It seems that your emission noise levels are not the same. Are you sure to use the same kind of pavement, slope, the same cnossos model (2015 or 2019 update), etc. ?

[AmandineHJ]

Hello,

I tried to find what was the different betwenn my two models and it seems that it was not the same pavement. The one for NoiseModelling results was NL-08 and the one used into CADNAA was the reference pavement, that explains my issue.

It is better now, thank you very much.
Sincerely,
Amandine