-
The phonetic folds, in combination with the articulators, are capable of producing highly intricate arrays of sound. The tone of voice may be modulated to suggest emotions such as anger, surprise, or happiness. Singers use the human intonation as an thingamabob for creating music.
Additionally, genetics also causes variances amongst the same sex, with men and women's singing voices being categorized into types. For example, among men, there are basses, baritones and tenors, and contraltos, mezzo-sopranos and sopranos among women. There are additional categories for operatic voices, see tongue type. This is not the only source of difference between male and female voice. Men, generally Private Voice Lessons speaking, have a larger phonetic tract, which essentially gives the resultant speech a lower tonal quality. This is mostly independent of the vocal folds themselves.