aphonic

from WordNet (r) 3.0 (2006)

aphonic
    adj 1: being without sound through injury or illness and thus
           incapable of all but whispered speech [syn: {aphonic},
           {voiceless}]

from The Collaborative International Dictionary of English v.0.48

Aphonic \A*phon"ic\, Aphonous \Aph"o*nous\, a.
   Without voice; voiceless; nonvocal; incapable of all but
   whispered speech.
   [1913 Webster + WordNet 1.5]

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