A register is the range within pitch space of some music or often musical speech. It may describe a given pitch or pitch class (or set of them), The term has wide application and can refer to any of several aspects of the human voice, including the following:
- A particular segment of the vocal range;
- A resonance area such as chest voice or head voice;
- A phonatory process;
- A certain vocal timbre; or
- A region of the voice set off by vocal breaks.
Speech pathologists and many vocal pedagogues recognize four vocal registers: the vocal fry, modal, falsetto, and whistle. To delineate these registers, pathologists specify vibratory pattern of the vocal folds, sequential pitches, and type of sound.