無音 can refer to: 1. A Touhou arranger.
Circle: 無影ｘ少女 (mueixsyoujo)
Homepage: http://mueixsyoujo.web.fc2.com/ 2. A singer/voice imitator on Nico Nico Douga. His name is read mune (ムネ).
みーちゃん (Mi-chan) is a Japanese male nico-artist well known for his uniquely low, husky voice with natural vibrato. He has covered mostly VOCALOID songs. He is also part of some collaboration projects like PointFive (.5) or Smiley*2G.
Yorukichi (よるきち) is an utaite with a low, husky voice that is somewhat airy yet rough. On occasion he uses several different voices in his covers, ranging from erotic to playful to ikemen. He has a very fast and narrow vibrato.