1. 
   normal hearing
   Type: Term Synonyms: acusis
   Found op http://www.medilexicon.com/medicaldictionary.php?t=39463
   
   
2. 
   normal hearing
   Synonym for acusis ... The ability to perceive sound normally. ... Synonym: normal hearing. ... Origin: G. Akousis, hearing ... (05 Mar 2000) ...
   Found op http://www.mondofacto.com/facts/dictionary?normal+hearing
   
   
3. 
   normal threshold of hearing
   modal value of the thresholds of hearing for a large number of listeners between 18 and 30 years of age with otologically normal ears
   Found op http://www.electropedia.org/iev/iev.nsf/display?openform&ievref=801-29-20
   
   

Tip: double click on a word to show its meaning.