Room Simulator and irregular rooms and sound reflection

[Lanion]

I am curious about two things with the room simulator...

1) Is it possible to do non-rectangular rooms? if not, is there a program that does, or a link to the math used?

2) When selecting how much sound each wall absorbs, what are some good tips? What value would plaster be? Brick? Carpet? Couches?

 

[John Mulcahy]

Rooms that aren't rectangular need to be solved by finite element methods as there are no closed form solutions for them. Example programs are ABEC (http://www.randteam.de/ABEC3/Index.html) and Soundeasy (http://www.bodziosoftware.com.au/).

There are example absorption coefficients at https://www.acousticalsurfaces.com/acoustic_IOI/101_13.htm

Note that absorption is frequency-dependent, so use the values for the frequency range which the simulator covers.

 

[Lanion]

Rooms that aren't rectangular need to be solved by finite element methods as there are no closed form solutions for them. Example programs are ABEC (http://www.randteam.de/ABEC3/Index.html) and Soundeasy (http://www.bodziosoftware.com.au/).

There are example absorption coefficients at https://www.acousticalsurfaces.com/acoustic_IOI/101_13.htm

Note that absorption is frequency-dependent, so use the values for the frequency range which the simulator covers.

Thanks. Given that most systems with n>3 have no closed solutions (yet we got to the moon!) I'm surprised there arnt more interpolation programs. With that said, would it be possible to build a room in UE4 or Unity with Steam Audio and get results? The audio occlusion and reflection is really impressive!

 

[John Mulcahy]

Possibly. On the professional end there are tools like Odeon, but there are some open source offerings as well.