positional variant (does not occur in isolation)
Based on Maciołek & Tambor (2012)
Voiced: the vocal folds are in contact, the air coming from the lungs causes them to vibrate.
Labiodental: the lower lip gets closer to the upper teeth.
Palatalized: the middle of the tongue gets closer to the hard palate as a secondary articulation.
Fricative: there is a narrow passage between the articulators, the air from the lungs hits the edge of the passage and creates noise.