:Context-sensitive voicing:

A process of of child phonology. Many children go through a stage in the acquisition of the phonology of their native language when the voicing of consonants is not contrastive, but is determined by the context in which the consonant appears. A typical pattern is for obstruent consonants to be voiced when followed by a vowel, but voiceless elsewhere. An example from English is the child pronunciation bɪk for the word pig.