Pachyderm - How can I Make Multi-Layer Simulations

[Ozan_AKAR]

Greetings everyone and @Arthur!

I’m in an issue with Pachyderm Acoustic. I have a room that has multi-layered walls. Each layer is a different material. Source is inside and receiver is outside. How can I simulate this scenario?

Should I use different surfaces for each material on the walls like this?

or

Should I use “Call Absorption Designer” to assign multiple materials into single surface?

If your answer is “Call Absorption Designer”, there is an another problem shows up here:

When I complete my layering and press “Create Smart Material” i get a material with blank chart like this:

Except, what if I get the coefficient values from Absorption Designer and write them into this panel manually? Because when I hit the “Create Smart Material” button, nothing appears in the panel below.

Footnote Question: Could an issue like a ray bouncing infinitely between two surfaces in the first scenario (assigning each material to different surfaces)?

Thanks in advance!

[Arthur]

Hi @Ozan_AKAR,

Right now, I think the best thing you can do with that is to use single surfaces, and go look up the to transmission loss of your walls and then sign them in the transparency tab. Use the transmission loss variant to specify in db of transmission loss. You can also specify the absorption of those walls any way you like, but didn’t forget about scattering. Everything scatters at least a little bit.

You should also know, that window will not be simulated correctly using ray tracing. You need a numerical method. Pachyderm’s numerical methods are still in development, by they are making big strides right now. Feel free to give it a shot, but no promises yet.

Arthur