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 acting in the United States actors in a singing role has also seen change, as both Jeremy Irons and Mel Gibson have done singing in the respective films "The Lion King" and "Pocahontas", rather than have a singer as substitute (However, the former did most of his own singing, but due to straining his vocal cords, he didn't finish; instead, Jim Cummings did his partial singing voice for the rest of the song). Voice actors have a relatively small but dedicated fan base, with appearances at large events like Comic-Con International, various anime conventions, and websites dedicated to profiling their work. Commercials for television and