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.

At first acoustics attributed to the different sounds only a limited number of characteristic features.

Languages differ essentially in what they must convey and not in what they may convey.

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.

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.