class_docstr: Max. phonological unit, contains phones and triggers alternations.
docstr: Pronounce s as voiced (z) when followed by voiced.
docstr_tok: ["Pronounce","s","as","voiced","(","z",")","when","followed","by","voiced","."]
code: def _s_voice_assimilation(self):
      """
      Pronounce s as voiced (z) when followed by voiced.
      """
      out_phones = self.phones
      target = Phone("z")
      for n in range(len(self.phones)):
          p = self.phones[n]
          if p.ipa == "s" and p.right.vce:
              out_phones[n] = target
      self.phones = out_phones
      self._refresh()
  
imports: import re
  import unicodedata
  from typing import List
  from nltk.tokenize import wordpunct_tokenize
  from cltk.core.cltk_logger import logger
label_desc: Use image node_id 4 for calling the Word obj's underlying member method code with example usage: obj._s_voice_assimilation() without return types