His voice was notable for its range, a true infra-bass ( Basso profondo) , including full, resonant low and very-low notes with relaxed vibrato; also for its unusual combination of extreme size and a purring, contrabassoon-like timbre.
Kurt Vonnegut | Kurt Weill | Kurt Russell | Kurt Masur | Kurt Angle | Kurt Koffka | Kurt Gödel | Kurt Elling | Kurt Schwitters | Kurt Rosenwinkel | Kurt Hahn | Kurt Wallander | Kurt Tucholsky | Kurt Sanderling | Kurt Kren | Kurt Busiek | Kurt Lewin | Kurt Jooss | Kurt Andersen | Kurt Warner | Kurt Squire | Kurt Schmoke | Kurt Gerstein | Kurt Busch | Kurt Browning | Kurt Wiese | Kurt Waldheim | Kurt Vile | Kurt Thomas | Kurt St. Thomas |
Other well known vocalists who endorsed the initiative include Shirley Verrett (soprano), Joan Sutherland (soprano), George Shirley (tenor), Luciano Pavarotti (tenor), Sherrill Milne (baritone), Fedora Barbier (mezzosoprano), Grace Bumbry (soprano), Elly Ameling (soprano), Peter Schreier (tenor), Birgit Nilsson (soprano), Dietrich Fischer-Dieskau (baritone), Kurt Moll (basso), Marilyn Horne (mezzosoprano), and Ruggero Raimondi (basso).