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1 definition found
 for Acoustic duct
From The Collaborative International Dictionary of English v.0.48 :

  Acoustic \A*cous"tic\ (#; 277), a. [F. acoustique, Gr. ?
     relating to hearing, fr. ? to hear.]
     Pertaining to the sense of hearing, the organs of hearing, or
     the science of sounds; auditory.
     [1913 Webster]
  
     Acoustic duct, the auditory duct, or external passage of
        the ear.
  
     Acoustic telegraph, a telegraph making audible signals; a
        telephone.
  
     Acoustic vessels, brazen tubes or vessels, shaped like a
        bell, used in ancient theaters to propel the voices of the
        actors, so as to render them audible to a great distance.
        [1913 Webster]

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