Voice type in women. The size and development of adult lungs also changes what the voice is physically capable of doing. From the onset of puberty, the human voice is in an in-between phase where it is not quite a child's voice nor an adult one yet. This is not to suggest that the voice stops changing after puberty. Different singers will reach adult development earlier or later than others, and as stated above there are continual changes throughout adulthood as well. Treble can refer to either a young female or young male singer with an unchanged voice in the mezzo-soprano range.
The Singing Voice of Japan The Singing Voice of Japan The singing voice of Japan (, "Nihon no Utagoe" / うたごえ運動, "Utagoe-undō") is the name of a social and political movement that emerged after World War II in Japan and based on musical and choral activities of the working class of the entire nation. On the ideological position of communism or democratic socialism, activists of the movement organize choral circles in factories, in schools and in their residential areas. The movement reached its peak in the years 1950–60. Japanese singer Akiko Seki () is generally regarded as the founder of the Singing Voice of Japan.