Voiceless alveolar trill


A voiceless alveolar trill differs from the voiced alveolar trill only by the vibrations of the vocal cord. It occurs in a few languages, usually alongside the voiced version, as a similar phoneme or an allophone.
Proto-Indo-European developed into a sound spelled, with the letter for and the diacritic for, in Ancient Greek. It was probably a voiceless alveolar trill and became the regular word-initial allophone of in standard Attic Greek that has disappeared in Modern Greek.
Features of the voiceless alveolar trill:
;Alveolar

Voiceless alveolar fricative trill

The voiceless alveolar fricative trill is not known to occur as a phoneme in any language, except possibly the East Sakhalin dialect of Nivkh. It occurs allophonically in Czech.

Features

Features of the voiceless alveolar fricative trill: