This document provides information on English vowel sounds. It discusses that all English vowels are voiced, meaning the throat vibrates when producing them. It describes different aspects of vowel production including lip and tongue position, length as long or short, and being tense versus relaxed. There are 17 total vowel sounds in English presented. Exercises are included asking the reader to produce vowel sounds in words and identify characteristics like which uses more open mouth or causes rounding of the lips. References for further reading on pronunciation instruction are also listed.