Learning Forum

[Paweł Truszczak]

I've done a sound pressure level simulation in an air assigned sphere with an incident wave source. The thing is I want to measure sound pressure level in a certain point INSIDE the sphere filled with a mesh. From what I know I can't use far-field spl mic, since it shouldn't be used inside a mesh and that's what I want to achieve. Besides that, it gives me wrong results for some reason. Do you know how I could measure frequency response for a particular, chosen point in space?

[Erik Kostson]

Hi

Q:The thing is I want to measure sound pressure level in a certain point INSIDE the sphere filled with a mesh

Answer: You need to pick the nearest node to this certain point and scope that to your acoustic results.

ALso you can split the geometry so you have a vertex at the point of interest, and scope that vertex to the acoustic results of interest.

All the best

Erik

[Paweł Truszczak]

Hi Erik,
is there a function in Mechanical that will help me with the first one? 

You need to pick the nearest node to this certain point and scope that to your acoustic results.

Or do I have to manually look for the node and manually look for an option to view Frequency response in that certain node?

[Erik Kostson]

Yes, manually pick/select the node (or if you create a named selection of it before) and scope it to the acoustic result of interest.

[Paweł Truszczak]

Okay, there's one, last question. I've been trying to select a node inside a meshed sphere, but even if I do section, it only allows me to select a node on the surface of a sphere. What can I do to select a node inside it, since the mesh is 3d and not only on a surface?

[Erik Kostson]

Perhaps use the second option that is to create a named selection of the node using the worksheet function.

So below we want to get/create a named selection of a node near or at 0 m ,1 m,0.2 m in the global system. Then use this named selection in the acoustic result scoping.