Analysis of the voice of sucklings shows that they have two different cries; one has a soft and the other, a hard beginning. These cries were described in detail by Flatau and Gutzmann,1 who expressed belief that the soft onset (Einsatz) is significant of a good mood while the hard one indicates distress. But frequently the cry begins softly and changes more or less rapidly into a hard one. This indicates that the words "soft" and "hard" describe not only the beginning, or onset, but some auditive characteristics during the continuation. The onset depends on the form of the glottis at the beginning of the cry.2 Three possibilities exist: 1. The glottis may form a triangle, as it does in ordinary exhalation; in this case the cry or the vowel will be introduced by an h, which is nothing but an audible exhalation. 2. The vocal cords may approach each
FROESCHELS E. HYGIENE OF THE VOICE. Arch Otolaryngol. 1943;38(2):122–130. doi:10.1001/archotol.1943.00670040133003
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