Otodynamics Otoport Lite, Руководство пользователя, Страница: 60 / 208

CHAPTER SEVEN
OAE test procedure
60
OAE test procedure
Consistent Stimulus Out Stimulus Highlighted
High Noise of Range Ringing Message
No No No Checkfit
Yes No No Noisy
No Yes No Check Probe Fit
No No Yes Ringing
Yes Yes No Check Probe Fit
Yes No Yes Ringing
No Yes Yes Check Probe Fit
Yes Yes Yes Check Probe Fit
The following table describes what Highlighted Message will appear if
more than one condition is met.
7.2
TE test (TEOAE model)
During testing the Otoport plays a series of clicks into the ear and records
the response. The OAE signal is very small and difficult to distinguish from
the noise made by other sounds in the room and by the patient. The longer
the Otoport records for, the easier it is to distinguish the OAE signal from
the noise. The Otoport looks at the ratio of the OAE signal to the noise;
this is known as the Signal to Noise Ratio or SNR. The Otoport measures
the SNR in a number of different frequency bands. The pass criteria is set
in the Configuration area (see chapter
11
Configuration ). The default
pass criteria is an SNR of 6dB and a minimum signal of >-5dBSPL in at
least two frequency bands.
It is the responsibility of the user to ensure that the pass criteria set meet
their requirements.