An investigation into the preservation and development of the human voice with special reference to children and adolescents

Abstract

The voice is the only natural and, when properly trained, also the most perfect instrument. Any other instrument, be it string, wind or percussion, is a separate entity, an object devised by man, and over the years altered, improved and perfected. None of those, from primitive pipes to the most intricate electronic apparatus can produce a single sound without human aid. It needs someone to play it manually and/or orally. Intro., p. 1.