Voiced Alveolar Sibilant
The voiced alveolar sibilant is common across European languages but is relatively uncommon cross-linguistically compared to the voiceless variant. Only about 28% of the world's languages contain a voiced dental or alveolar sibilant. Moreover, 85% of the languages with some form of are languages of Europe, Africa or Western Asia.
In the eastern half of Asia, the Pacific and the Americas, is very rare as a phoneme. The presence of in a given language always implies the presence of a voiceless .
Read more about this topic: Voiced Alveolar Fricative