Youth Voice is a period of transition from the childish to the adult voice of a normal stage of physiological changes. Voice of students in the period, due to vocal cord congestion, poor sound and lasting, easy fatigue, the sound is not stable, when the singing was very laborious. Therefore, we must fully understand the acoustic phase change of the physiological and psychological characteristics of students master the changing period of voice change in sound science and the law to expand the voice of the training.
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