You're not imagining it!

I've always referred to the two major bogan accents as the Bushpig(High pitch) and the Wombat(Low bass). If a bogan doesn't have one of these then it's likely they'll graduate from Bogannery(Bogannitude? or maybe just TAFE?) at some point. Or they go the other way and deteriorate into one or the other.

Shazza from Housos is a perfect example of the Bushpig, props to the lovely Elle Dawe for nailing it.

Manu Bennet (yes I know he's a kiwi) does the classiest Wombat in my opinion.

That said, I'm an immigrant so it's just a theory I've formed over many years of trying to make sense of youze lot :)

Edit; half finished sentence.