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eardrum

3.71  tympanic membrane; eardrum; drum membrane. Conical shaped translucent membrane that separates the external acoustic meatus from the middle ear cavity. The handle of the malleus is attached to the tympanic membrane medially.

Annotation            The amplitude of displacement of the tympanic membrane for a 1000 Hz tone at the threshold of audibility is about 10 nm. For low-frequency tones at the threshold of feeling the amplitude of displacement is about 0.1 mm.

Related Articles:
  • Standards Terms: auricle
  • Standards Terms: pinna
  • Standards Terms: middle ear
  • Standards Terms: tympanic cavity
  • Standards Terms: tympanum
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Related Terms:
  • Term: external acoustic meatus
  • Term: threshold of audibility
  • Term: threshold of feeling
  • Term: tympanic membrane
  • Term: drum membrane
  • Term: displacement
  • Term: middle ear
  • Term: amplitude
  • Term: frequency
  • Term: malleus
  • Term: tone

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