NoiseCapture
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Calculation of additional noise parameters (L10,L50,L90) from Octave Band sound levels
Once we import the Geojson file in an ArcGIS environment we can see in the Attribute Table that we have all the octave band sound levels and the LAeq (avg). My question is how we can calculate the percentile noise levels and whether this is something that can be added in the Attribute table by default in a future update of the app.
Thank you,
Efstathios
ios
@nicolas-f could you give the link to the source code for the percentile indicator L10, L50... calculation. Thanks.
Hi,
The source code is here:
https://github.com/Ifsttar/NoiseCapture/blob/master/sosfilter/src/main/java/org/orbisgis/sos/LeqStats.java
Percentiles are calculated from L(A)eq 1s values.
Thank you for the code Nicolas.
You would make our life much easier if Lpercetiles were also recorded in the geojson file and finally in the Attribute table when we open the file in a GIS environment. Now I am trying to do this by adding extra columns in the Attribute table and using a formula to calculate the percentiles.
Have a good day, Efstathios
On Mon, 21 Feb 2022 at 08:55, nicolas-f @.***> wrote:
Hi,
The source code is here:
https://github.com/Ifsttar/NoiseCapture/blob/master/sosfilter/src/main/java/org/orbisgis/sos/LeqStats.java
Percentiles are calculated from L(A)eq 1s values.
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-- Dr. Efstathios Margaritis GIS Specialist - Urban sound planner
Hi,
Each feature of the geojson file is already at 1 second interval. You can compute a single percentile for the whole geojson file or a range of features.
-Nicolas
Hi Nicolas,
Would it be correct to calculate the percentiles for each second? I don't need it for the whole file.
Efstathios Margaritis
On Wed, 2 Mar 2022 at 09:32, nicolas-f @.***> wrote:
Hi,
Each feature of the geojson file is already at 1 second interval. You can compute a single percentile for the whole geojson file or a range of features.
-Nicolas
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-- Dr. Efstathios Margaritis GIS Specialist - Urban sound planner
You want to compute each second the percentiles of all previous seconds ? If you want to do this I have nothing against it.