EUROSPEECH 2001 Scandinavia
Our paper addresses the question of covariation between intraoral air pressure and size of contact area between tongue and palate during the articulation of the Norwegian stop consonants /t/ and /d/. An EPG investigation of the two plosives shows a larger contact area between tongue and palate for /t/ than for /d/. An investigation of intraoral air pressure during the articulation of the two plosives shows higher air pressure for /t/ than for /d/. Presumably, the covariation between air pressure and contact area between tongue and palate may be accounted for in terms of general phonetic-physiological factors. In order to prevent air from escaping between the tongue and the palate during the closing stage of the plosive, and thus producing a fricative, a larger contact area is needed for the voiceless than for the voiced plosive since the air pressure is stronger for the voiceless than for the voiced plosive.
Bibliographic reference. Moen, Inger / Simonsen, Hanne Gram / Huseby, Morten / Grue, John (2001): "The relationship between intraoral air pressure and tongue/palate contact during the articulation of norwegian /t/ and /d/", In EUROSPEECH-2001, 265-268.