[Comparative study of the ventilatory function during normal and whispered pronounciation of certain syllabes].

The study was done on 4 french speaking subjects: 2 men and 2 women. The pulmonary flow and volumes, aesophageal pressure and electromyography by needle of an internal intercostal were simultaneously recorded during normal and whispered pronounciation of 48 syllables These were made up of an occlusive consonant in a first position or not, followed by the vowel "A". The pneumotachographic tracing is reproducible both in normal and whispered voice, differing according to the mode of pronounciation. The aesophageal pressure and the electromyography of the internal intercostal are equally different. The comparative study of the ventilatory function in normal and whispered voices enabled the dissociation on pneumotachographic tracing of the variation of flow due to movements of the naso-bucco-pharyngeal articulations from those coming from movements of the vocal cords.