Pachyderm acoustic - Listener Envelopment

Hi, I am currently developing a master’s thesis on acoustic driven form finding for a small music performance space using Pachyderm.

I wanted to know if there is any way of including any analysis parameters for listener envelopment, such as IACC or Lateral Fraction. I know Lf is possible to measure in the Rhino plugin, but I am working with an optimisation step inside grasshopper so I would need to keep everything in grasshopper if possible.

Thank you!

Hi,

If you have questions about Pachyderm, please call me using @Arthur.

I haven’t added lateral fraction to the grasshopper plugin, but I can. I will get it done in one of the next releases.

Arthur

Hi,
An update on this - I just uploaded 2.6.0.5 to the package manager. Assuming all went well, there should be working Lateral Fraction and Lateral Efficiency components in Grasshopper now.

Let me know how it works.
Arthur

Hi, I have a closed room beside the street and I want to know can I use Pachyderm and create some nodes on the street as a sound source and analyses the sound level inside the room with or without noise barrier ?@Arthur

Hi,

You can’t expect absolute accuracy for this, but you could use the finite volume method to estimate it. I would not use the geometrical methods for it.

Good luck. Feel free to ask questions.

Arthur

Could you please explain a little bit more?

The finite volume method is a volumetric numerical method. Type pach_numeric_ timedomain to see the rhino interface. Basically,a volume is divided into nodes and sound travels using finite differences from node to node. Wave based behavior is simulated more accurately.

There are tools in grasshopper also. Find the finite_volume_method component. Play around a bit and let’s talk.

Arthur

Thank you