Vocal weight

Vocal weight refers to the perceived "lightness" or "heaviness" of a singing voice. This quality of the voice is one of the major determining factors in voice classification within classical music. Lighter voices are often associated with the term "lyric" and are usually brighter and more agile; heavier voices are often associated with the term "dramatic" and are usually powerful, rich, and darker. Other voice types like the spinto have a more medium vocal weight.