National Center for Voice and Speech - Information
Features a tour of the parts of the body used in speech and singing as well as information about sound and auditory communication.
Questions/Answers About Voice Problems
Discussion by the American Speech-Language-Hearing Association of various medical conditions affecting the voice.
Singing Voice
Detailed information, history and links about the human voice, opera and the art of singing.
Young Singers Checklist - Laura Claycomb
Advice for young vocalists entering a conservatory program. Includes information on choosing a program, caring for your voice and studying to be a professional singer.