A study on the identification of the change-voice period for song guidance : Use of the wave form analysis

传统上，判断青春期的声音变化何时开始，何时结束在很大程度上依赖于专家的经验。然而，许多缺乏这种专业知识的音乐教师在教青春期的学生时遇到了困难。为了改善这种情况，我们研究了频率成分的形成峰分析的潜在用途，其中我们将语音共振与实际可听到的声音进行了比较。结果表明，随着声音的变化，第四峰的音高降低，第五峰的音高水平移动或上升。因此，我们能够清楚地看到青春期前和青春期后的声音之间的区别。使用波形分析是一种原始的方法，用于指定青春期的声音变化开始的年龄。这种方法即使在很难检测到青春期声音变化何时开始和何时结束的情况下也是有效的，因为通过这种方法我们可以清楚地检测到学生声音的可听变化。

Traditionally, the judgment of exactly when puberty in voice change starts and when it ends has largely relied on the experience of experts.However, many music teachers who lack such expertise, have had trouble teaching students in puberty.As a way to improve the situation, we examined the potential usefulness of the formant analysis of frequency component, in which we compared voice resonances with actual audible sounds. The result indicated that as one's voice changed, the pitch of the forth Formant lowered and that of fifth Formant moved horizontally, or rose. Thus, we were able to clearly see the difference between pre-puberty and post-puberty voices.The use of the wave form analysis is an original method for specifying the age at which puberty in voice change starts. This method is effective even when it is difficult to detect when voice change in puberty starts and when it finishes, because with this method we can clearly detect audible changes in student's voice.