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Missing Specular Reflection Functionality in the Ray Acoustics Module
Posted Jan 27, 2021, 2:38 p.m. EST Acoustics & Vibrations, Studies & Solvers Version 5.5 1 Reply
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Hello,
I am trying to set up my own Ray Acoustics study, very similar to the "small concert hall" file from the application libraries. I want to perform almost the exact same study, but with my own geometry. I have set up my geometry by building it inside COMSOL 5.5, rather than importing it from an outside file. I'm interesting in computing the impulse response from a 3D receiver, the ray trajectories and the reverberation times (T60).
So far, I believe I have set everything up correctly, but there are some key differences in my wall boundary condition tab. I will attach screenshots to show the differences. I wish to carrry out the study in the same way, by using the Specular Reflection option for the wall conditions.
In the original tutorial file, selecting "Specular Reflection" as the wall condition opens up the "Reflection Coefficient Model" box that allows you to specifiy the absorption coefficient. In my version, this does not happen. You can also see that the equations specified for use in the tutorial and my own file are not the same.
Any ideas on how to get this to work?
Many thanks,
Tom Walker Student at the University of Glasgow
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Sorry I misued the term "Spectral", I meant "Specular" Reflection.
Many thanks,
Tom