Using acoustic analysis effectively in vocal instruction during the voice-change period

观察和记录了儿童(6名男性和6名女性)在三年时间里唱歌和说话的声音变化。声学分析结果表明，对于女孩来说，第三共振峰(24 KHz)在10 kHz及以上的人将成为女高音，而在9 kHz及以下的人将成为女中音。从确定未来语音类型的角度来看，这可能非常有用。研究还表明，在歌唱时，除了区分声调和假声之外，还可以使用门托音和混合音进行发声训练，这在变声时期及其周围的发声训练中是有效的。

Changes in the singing and speaking voices of children (six male and six female) over a three-year period were observed and recorded. The results of acoustic analysis indicate that, for girls, those whose third formant (shown at 24kHz) is 10kHz and above will become sopranos, while those whose is 9kHz and below will become altos. This can be very useful from the standpoint of determining the future voice type. The study also showed that teaching the use of portamento and mixed voice in addition to differentiating between modal and falsetto register when singing, is effective in vocal training in and around the period of voice change.