The word "sonorous" means "producing a full, deep, or resonant sound" or "having a pleasing, rich, or deep sound." It is often used to describe voices that are powerful, expressive, and have a strong vocal presence. James Earl Jones's voice is a perfect example of a sonorous voice. He is known for his deep, resonant voice that is both powerful and expressive. His voice has been used in a variety of roles, from Darth Vader in the Star Wars films to Mufasa in The Lion King.