If your dryer sounds like your central vac you either have the quietest central vac (mine with a muffler sounds like a fighter jet on takeoff) or the loudest dryer ever! My dryer (which has an extremely short run of the exact same type) and the vent is right above the GF vent it is almost silent, you can hear the GF when running in the front yard around the house.
I am not a fan of the aluminized paper flexible hoses. They tear and can burn and cause dryer fires (consumer reports recommends against them). I have no idea if some burning masking got wooshed out the exhaust if that could light up the flexible hose, but the all metal option is safer.