Linguistic sounds, considered as external, physical phenomena have two aspects, the motor and the acoustic.

Linguistic sounds, considered as external, physical phenomena have two aspects, the motor and the acoustic.

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.

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

The poetic function is the set towards the message itself, focus on the message for its own sake which by promoting the palpability of signs, deepens the fundamental dichotomy of signs and objects.

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.

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