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.

It is once again the vexing problem of identity within variety; without a solution to this disturbing problem there can be no system, no classification.

When I speak it is in order to be heard.

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.

Speech sounds cannot be understood, delimited, classified and explained except in the light of the tasks which they perform in language.

Bilingualism is for me the fundamental problem of linguistics.