vent size and material is as important to noise level as motor/fan is a tip i have for you
explain
like you get the 1500$ super hood that is a stealth jet and your builder installs a 6" duct of this stuff
and you get 130 decibels of turbulent rushing air through your duct that is louder than the cheapest loudest hood you could have bought at woolworth's
just make sure they install a duct that is as bigger or bigger than the hood manufacturer's max recommended size