Human ear

  • Human ear is most sensitive to sound frequency ranging between 20 to 20,000 Hz.
  • The ear consists of three parts—external, middle and internal.
  • The external ear collects and conducts the sound waves from the air .
  • The middle ear intensifies the force of sound vibration, without altering the amplitude.
  • The internal ear is concerned with the conversion of sound energy into nerve energy.
  • Three ossicles in ear — malleus, incus and stapes.
  • Clinical tests for hearing acuity : Rinne’s test,Weber’s test