Abstract
THE dark band in Fig. 1 is the reproduction of the speech track of a vowel (a in hatch) on a sound film. The serrated upper edge is the registration of the vibratory movement of the particles of air, that is, it is the curve of vibration. It is seen to consist of a series of portions—vibratory 'bits'—each of which begins strong and fades away to zero. Such a curve is the registration of a free vibration aroused by an impulse that is not a vibration. The glottal action consists of the repeated opening and shutting of the glottal slit. A puff of air is sent into the vocal cavity at each opening movement; each puff sets the air in the cavity into vibration.
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SCRIPTURE, E. Vowel Vibrations and Vowel Production. Nature 142, 619 (1938). https://doi.org/10.1038/142619a0
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DOI: https://doi.org/10.1038/142619a0
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