Discussion, Possibilities, and Limitations

High-speed videos are valuable to see details during normal childhood and especially pubertal development. HSV examples in boys show in some cases what can be interpreted as vocal fold modification of two adult and two child registers in boys. Two markings of contact maxima of the vocal folds are seen in Fig. 4.6 during the pubertal period. They are seen in Fig. 4.10 but weaker in boys in the postpubertal period corresponding to Voice Range Profiles (Fig. 4.21 f–i).