audiometer

from WordNet (r) 3.0 (2006)

audiometer
    n 1: an instrument used to measure the sensitivity of hearing
         [syn: {audiometer}, {sonometer}]

from The Collaborative International Dictionary of English v.0.48

Audiometer \Au`di*om"e*ter\, n. [L. audire to hear + -meter.]
   (Acous.)
   An instrument by which the power of hearing can be gauged and
   recorded on a scale.
   [1913 Webster]