Voice classification in non-classical music the muscular, aerodynamic, and acoustical conditions in the larynx and in the vocal tract. The subglottal pressure, the driving force in phonation, needs to be adapted in accordance with the laryngeal conditions.” In other words, the very act of singing consistently within one technique or another literally causes the voice to physically develop in different ways, and thus change the timbre of that particular voice. Another example would be a coloratura soprano in opera. This is not only the highest female voice in opera, but also distinguished by its ability to do vocal acrobatic leaps, fast vocal runs and trills,
Voice type is quite resilient, especially in early adulthood, and the damage may not make its appearance for months or even years. Unfortunately, this lack of apparent immediate harm can cause singers to develop bad habits that will over time cause irreparable damage to the voice. Singing outside the natural vocal range imposes a serious strain upon the voice. Clinical evidence indicates that singing at a pitch level that is either too high or too low creates vocal pathology. According to vocal pedagogue Margaret Greene, "The need for choosing the correct natural range of the voice is of great importance in singing