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

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.

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

What's next? Shall we appoint elephants to teach zoology?

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

Now the identification of individual sounds by phonetic observation is an artificial way of proceeding.

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