When my chicken is making noise, she is louder than when the ducks quack.
But the ducks will chatter where the chicken usually doesn't talk too much through the day. The duck chatter isn't very loud and doesn't usually last long.
I have runners and a welsh harlequin (and a buff orpington chicken)
I have four female Cayugas.
The cluck at each other constantly. The clucking is quiet until they find something that tastes good or excites them. Then they make rapid pig- like grunt noises or a series or rapid quacks.
THey do make noise a few times a day:
The Boss hen will issue a series of four LOUD single quacks when she hears someone go outside.
The Boss hen will issue a series of four LOUD quacks when she sees/hears someone get out of a vehicle.
The Boss hen will issue a series of multiple LOUD quacks when she's bossing the others around (come swim with me,everyone lay down, every go inside the dogloo, everyone come wait by the gate, etc.)
Second-in-command hen may quack or echo-quack LOUD quacks at any time the Boss hen quacks.
The other two hens will quack when their personal space is violated (when someone pokes them with a bill) or uses their oil gland for preening.
Boss hen and second-in-command make an indescribable flirty cluck-quack when they're ready to play hop on top on land or in the water.
They are quieter than chickens. But they're noisier than i thought they'd be.
We're lucky that our two closest neighbors are rarely home. They use those properties as vacation or second homes.
We're also lucky that there are many large lake and reservoirs near us that have wild ducks. In the warm months it would be hard to pinpoint our ducks as the noise source.
But I'm sure everyone on our side of the mountain can hear Boss hen when she quacks.
For me the big difference between the two is that the duck quacks are more pleasant sounding than rooster crows and non clucking chicken noises.
PS- Boss hen was also the loud peep-screamer in the bunch. Once a loud duck, always a loud duck in my limited experience.