I have heard that white bellbirds are at 160 decibels and roosters are over 180 decibels. I haven't ever recorded the sound myself, of course, but that is what I have read on articles about how roosters can close their ears to protect themselves.
Chickens hold the record for the loudest bird call on Earth, and that is the rooster's crow, which exceeds 180 decibels. That being said, there is really no way you can sound-proof your yard enough to block out all of his crowing.
Keeping one chicken inside, especially a rooster whose instinct is to have hens of his own to take care of, can easily make them depressed to the point of becoming sick and dying. Some chickens do fine being inside with their humans, but they need to go outside occasionally or else they won't be...