Examples of otoacoustic emissions

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Examples of otoacoustic emissions

• Marshall Chasin, AuD., Audiologist
• Musicians Clinics of Canada
• www.musiciansclinics.com

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Drummer

• Symmetrical audiometry.
• Uses a high hat cymbal near left ear.
• Feels that left ear is not right.
• Next slide shows asymmetrical OAEs

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Musician moving away from drummer

• Lead singer with drummer to rear.
• High hat cymbal to the singers rear-left.
• Improvement in left ear OAE after 6 months when
  moved away from drummer.
• No audiometric asymmetry noted on either test,
  despite OAE asymmetry.

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TTS at a non-audiometric frequency

• After a loud performance, audiometry was normal,
  but, abnormal 5000 Hz OAE.
• This is not a routine audiometric frequency.
• Audiometry was performed at 5000 Hz and a 10 dB
  notch was noted.
• Resolved after 2 weeks (probably sooner).

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