Yeah, I watch the Barefaced Youtube channel and try to understand but it's tricky for a muggle like me!
My only real experience of such things is where, in my day job as a highway design engineer, I've done noise assessments to determine if noise barriers are required adjacent to motorways, but that was relatively simplistic (albeit I'm sure the formulae were developed by some serious boffins at TRL who smoked pipes and suchlike) compared to modern acoustic modelling methods.