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Universite-Gustave-Eiffel / I-Simpa

An Open Source software for 3D sound propagation modelling
https://i-simpa.univ-gustave-eiffel.fr/
GNU General Public License v3.0
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my problem in the simulation with a suspended surface #309

Open yanndesa opened 2 years ago

yanndesa commented 2 years ago

Hi,

I have the following problem... I am drawing a geometry in the sketch up and I insert acoustic baffles in its interior, in a suspended way. However, in SPPS it does not recognize the absorption of these surfaces. Can someone help me please?

nicolas-f commented 2 years ago

Hi, Do you have any detail to share on your issue ?

yanndesa commented 2 years ago

Sem título

Hi Nicolas, thank you for your reply.

This image is my geomtry in sketch up. I exported it in 3ds format and imported it in isimpa normally. I configured everything according to the tutorials, but I can't make the absorption on suspended surfaces be recognized. The results generated are as if they did not exist.

Sem título2

Do you have any suggestions on how the software can correctly recognize these surfaces?

nicolas-f commented 2 years ago

In the SPPS configuration you can set 10K particles in order to display the trajectories of particles, you can see if they bounce or not on the panels.

yanndesa commented 2 years ago

Ok, thank you

I did that now and there are not so many particles that collide with the panels, I'm trying to put higher sources and greater number of particles per source to see the result

yanndesa commented 2 years ago

do you think this geometry is too complex? using as correction options to find the best results

Picaut commented 2 years ago

It is an interesting room. It seems a very large space, so you will need to consider a large amount of particle. Check the Schroeder curves for a given receiver, and observe the sound decay to see the dynamic. It a good way to know if you will be able to gave relevant results.

yanndesa commented 2 years ago

Hi Picaut,

Yes, it is a large room, your volume is more than 3000 m³. Thank you for your reply. I will be try simulate with 50 millions of particles and see the results.