How is hyperacusis tested in Bell palsy (idiopathic facial paralysis) (IFP)?

Updated: Jun 14, 2019
  • Author: Danette C Taylor, DO, MS, FACN; Chief Editor: Selim R Benbadis, MD  more...
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Answer

The patient who has paralysis of the stapedius muscle will report hyperacusis. This can be tested clinically using the stethoscope loudness test. In this, the patient wears a stethoscope, and an activated tuning fork is placed at its bell. The loud sound will lateralize to the side of the paralyzed stapedius muscle.


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