Voice training (also: speech training or technical speaking training) for actors who are usually done by trained voice coach, e.g. at drama school. Pronunciation, systematic training to ensure practical rhetoric, necessary for professional work in theater or film. - A classic textbook for the voice training is "The Little Hey - The art of speaking" (B. Schott 's Sons). In this book, voice physiology and phonetics for artists, the art of speaking, speech making and sound theory with practical exercises