168
Quality checks
CHAPTER SEVENTEEN
Quality checks
17.5
Real ear test
Testing with a known good ear allows for test data to be checked for
reproducibility
Perform a test using the standard test procedure on the known good ear.
This result may then be compared with previous results from the same
ear. A Pass should be achieved (when pass bands are set to the default).
Real ear tests should be performed in similar test environments to be
comparable.
Real ear tests should be run in both DP High and TE Quick modes.
Some adult ears with no significant hearing loss produce little or no
TEOAE. If possible the Real Ear Test should be performed on an ear
which is known to have strong TEOAEs.
If you are unable to achieve a
Real Ear OK
result in an ear which is known
to have OAEs then:
• Check the subject has no middle or outer ear problems,
such as a cold or wax blockage, which might prevent OAE recording.
• Check a good probe fit has been achieved.
• Check that the probe is not blocked.
• Check the probe still passes the probe calibration test (see above).
• Try recording emissions from another subject.
If you are still unable to achieve a
Real Ear OK
result then, if the resources
are available try recording with a different probe or with a different Otoport.
If the problem persists, contact your dealer or Otodynamics.