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 classification in non-classical music a solo vocalist. Children's voices, both male and female, are described as trebles, although the term boy soprano is widely used as well. In non-classical singing, it is difficult to place voices within either system for two major reasons. First, these voice categorizations were made with the understanding that the singer would be using classical vocal technique. These specific techniques, through study and training, result in a particular kind of vocal production and vocal timbre for each voice type which is unique to classical music. This is particularly problematic when trying to apply the operatic terms, as the vocal types