Hey, it happens that I follow your profile and found this article. Great job!

Are you familiar with PINNs (Physically Informed Neural Networks)? I think you can take advantage of the physical properties of the reverb phenomena and introduce a "physical-driven" training for your model.

If you are interested, take a look on this: https://github.com/maziarraissi/PINNs

And also, if you liked the PSO for optimization for deep learning, there is an implementation for PINNs:

https://github.com/caio-davi/PSO-PINN