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.
Roman JakobsonA new era in the physiological investigation of linguistic sounds was opened up by X-ray photography.
Roman JakobsonAt first acoustics attributed to the different sounds only a limited number of characteristic features.
Roman Jakobson