Avoiceless alveolar implosiveis a rareconsonantalsound, used in somespokenlanguages.The symbol in theInternational Phonetic Alphabetthat represents this sound is ⟨ɗ̥ ⟩ or ⟨tʼ↓⟩. A dedicated IPA letter, ⟨ƭ⟩, was withdrawn in 1993.
Itsmanner of articulationisocclusive,which means it is produced by obstructing airflow in the vocal tract. Since the consonant is also oral, with nonasal outlet,the airflow is blocked entirely, and the consonant is aplosive.
Itsphonationis voiceless, which means it is produced without vibrations of the vocal cords.
It is anoral consonant,which means air is allowed to escape through the mouth only.
It is acentral consonant,which means it is produced by directing the airstream along the center of the tongue, rather than to the sides.
Theairstream mechanismisimplosive(glottalic ingressive), which means it is produced by pulling air in by pumping theglottisdownward. As it is voiceless, the glottis is completely closed, and there is no pulmonic airstream at all.
Mc Laughlin, Fiona (2005), "Voiceless implosives in Seereer-Siin",Journal of the International Phonetic Association,35(2): 201–214,doi:10.1017/S0025100305002215,S2CID145717014
