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.
Alfred Wolfsohn Voice Research Centre to me, and though I only went for a short period of time, it helped enormously. It gave me confidence in other areas of my life. Whilst some students, like Blue, attended for a short period, often for one singing lesson per week over several months, others spent entire days at the Centre, having singing lessons and observing others. These included Jenny Johnson, whose voice typified for Wolfsohn what he believed was possible for every human voice trained in his approach to extended vocal technique. Under Wolfsohn's tutelage, Jenny Johnson developed a vocal range of almost 6 octaves, as well