As someone said, the noise may well not be your dryer.
Many years ago, some neighbours complained about us (just the two of us then, before kids ...) playing drums and disturbing them. We were mystified; had no drums ... were we perhaps playing records (yes, long time ago) too loudly? We didn't know.
Anyway, they got the council involved, specified drum playing into the early hours when we knew we had been fast asleep. The affair rumbled on, the council offered mediation, neighbours logged dates and times when we were banging the drums. (We still owned no drums to bang.)
I looked over the times they said we were playing drums. It appeared random. Then, at last, I noticed something ...
... Next time it rained at night, I put on a raincoat and snuck into their garden. Yes, indeed, a patter like a drum. It persisted: rat-a-tat, bing-bong, rat-a-tat-a-tat ... Drumming!? I went closer, and saw, in the moonlight ...
... Neighbours had a leaky gutter, just above an old paint tin they had left upended years ago. The rain off the roof gathered in the gutter, fell in large drops onto the empty tin. Bang! Bong! Rat-a-tat!
We told the neighbours. They moved the tin. But didn't apologise for reporting us to the council. We never really spoke to them again. I suppose they were a bit embarrassed. Anyway, we moved on, and away.
True story.