I was reading this question and it made me suddenly remember another story I read in a book somewhere in the 90s to the early 2000s. Rather than being about a sighted man showing up in a community of the blind, this involved a hearing man (for some reason, I want to say he was either a reporter or an encyclopaedia salesman) showing up in a community for the deaf. They were socially isolated, the result of the government or society trying to eliminate hereditary deafness. I don't remember if the theme was of eugenics or simply that deaf people were kept from meaningfully interacting with society. While there, the protagonist notices that the children (all of whom are deaf) spend time standing in fields, holding hands, and swaying to music he can't hear. He comes to realize that, by being completely isolated from sound, the community hears something more fundamental to the universe, and the story ends with the community using this to move to another world, possibly a higher plane of existence.
One of the odd details that I remember was a member of the community communicating that when they started out, they were preyed upon by men who assumed they would be easy targets due to their deafness, and that they had both trained to defend themselves and also kept a number of guard dogs on the premises.