Some languages have a "voiceless alveolar trill". In the normal alveolar trill, the vocal cord vibrates. In voiceless alveolar trill, the vocal cord does not vibrate. We do not often use voiceless alveolar trill, but we often use the voiced alveolar trill. We can find it in Ancient Greek, where it was spelled ⟨⟩; this sound has combined with in Modern Greek.