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The variations requested about 14 vocal pairs confirm two privileged axes: one horizontal of gravity, the other vertical of aperture, with however on each of the axes an interference between both aspects. Besides these common points, to which belongs the perception of /o/ as the gravest vowel, the results obtained with Frenchmen differ from those of the foreigners in so far as the native speakers are revealed to have a more phonological than phonetic and a more proprioceptive than auditory perception. Likewise, we notice the emergence of two perceptive axes: an auditory acute/grave axe, which is rather linked to the volume of the cavity, and a proprioceptive ‘opening’/‘closure’ axe, which is linked to the joined factors of aperture and retraction as opposed to closure and labialization. The clearness of the vowel becomes a result of the acuity and of the perceptive ‘opening’, the darkness a result of the gravity and of the ‘closure’.

Test sur la perception des voyelles orales françaises par des Français et des étrangers