apho·nia /(ˌ)eˈfoniə/
  失聲,無聲
  apho·nia /(ˈ)eˈfonɪə/ 名詞
  失聲,失音
  A·pho·ni·a Aph·o·ny n.  Med. Loss of voice or vocal utterance.
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  aphonia
       n : a disorder of the vocal organs that results in the loss of
           voice [syn: voicelessness]