1. 
   phonasthenia
   Difficult or abnormal voice production, the enunciation being too high, too loud, or too hard. ... Synonym: functional vocal fatigue. ... Origin: phon-+ G. Astheneia, weakness ... (05 Mar 2000) ...
   Found op http://www.mondofacto.com/facts/dictionary?phonasthenia
   
   
2. 
   phonasthenia
   (fo″nәs-the´ne-ә) weakness of the voice or difficulty speaking owing to fatigue; called also vocal fatigue.
   Found op http://www.encyclo.co.uk/local/21001
   
   
3. 
   phonasthenia
   phonasthenia 1. Difficult or abnormal voice production, the enunciation being too high, too loud, or too hard.2. Weakness or hoarseness of the voice; especially, that which results from bodily exhaustion.
   Found op http://www.wordinfo.info/words/index/info/view_unit/222/2
   
   
4. 
   phonasthenia
   Type: Term Pronunciation: fōn′as-thē′nē-ă Definitions: 1. Weak voice production, which may be due to fatigue. Synonyms: functional vocal fatigue
   Found op http://www.medilexicon.com/medicaldictionary.php?t=68344
   
   

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