The voiced alveolar trill is a type of consonantal sound used in some spoken languages.

In many Indo-European languages, a trill may often be reduced to a single vibration in unstressed positions.

[1] Languages where trills always have multiple vibrations include Albanian, Spanish, Cypriot Greek, and a number of Armenian and Portuguese dialects.

[citation needed] People with ankyloglossia may find it exceptionally difficult to articulate the sound because of the limited mobility of their tongues.

It sounds like a simultaneous [r] and [ʒ], and some speakers tend to pronounce it as [rʐ], [ɾʒ], or [ɹʒ].