A new era in the physiological investigation of linguistic sounds was opened up by X-ray photography.

Bilingualism is for me the fundamental problem of linguistics.

When I speak it is in order to be heard.

Every linguistic sign is located on two axes: the axis of simultaneity and that of succession.

Acoustic phonetics, which is developing and increasing in richness very rapidly, already enables us to solve many of the mysteries of sound, mysteries which motor phonetics could not even begin to solve.

Semantics, or the study of meaning, remained undeveloped, while phonetics made rapid progress and even came to occupy the central place in the scientific study of language.

Remember that the pharynx is at a crossroads from which leads off, at the top, the passage to the mouth cavity and the passage to the nasal cavity, and below, the passage to the larynx.