Voice classification in non-classical music chart that follows. The ranges given below are approximations and are not meant to be too rigidly applied. Some men, in falsetto voice or as a result of certain rare physiological conditions, can sing in the same range as women. These do not fall into the female categories, instead called countertenors within classical music. Within contemporary music, however, the use of the term "tenor" for these male voices would be more appropriate. Teaching voice within non-classical music is an emerging field. Up to this point, voice teachers and voice research have been largely concentrated with classical methods of singing. However,
Voice type when attempting to classify it: vocal range, tessitura, timbre, and vocal transition points known as "passaggio". However, teachers may also consider physical characteristics, speech level, scientific testing, and other factors such as vocal register. Voice classification into the correct voice type is important for vocal pedagogues and singers as a guiding tool for the development of the voice. Mis-classification of a singer's voice type is dangerous. It can damage the vocal cords, shorten a singing career, and lead to the loss of both vocal beauty and free vocal production. Some of these dangers are not immediate ones; the human voice