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,
YL Male Voice Choir makes two short concert tours in Finland each year, and one or two tours yearly in the Asian, European or American continent. Recent years have seen YL tour in Norway (2009), Belgium and USA (2010) and China and Mexico (2011). The concert tour in USA had a grand finale in Carnegie Hall with Osmo Vänskä and the Minnesota Orchestra. Around 12 000 listeners attend YL's Christmas concerts in the churches of Helsinki each year, and thousands to hear the traditional songs celebrating First of May. YL Male Voice Choir YL Male Voice Choir (formerly: Helsinki University Chorus; ) was founded