I think this person is trying to develop a new 'non crowing' breed now. But the sound multiplies by the number of roosters you have. But 2 roosters compete, answer each other and are more than twice as noisy as one alone. Some of the larger, heavier breeds of chickens, have a lower voice that doesn't carry as far, and just one, may not crow a lot.
Bantams have a much higher and penetrating crow, usually, and it carries further.
But if you want to keep chickens, there are lovely hens of a number of breeds. Even hens make a good cackle, when they lay eggs, but if they have a nice coop, and lay inside, their cackle will not be heard very far. Hi, my Silkie cockerel is very quiet in comparison to my neighbours' hybrid hisex cockerels. Somebody wrote back to Abby stating roosters can not crow unless they are standing up. They do stand tall and throw back their heads a bit when they vocalize.