Interacoustics Eclipse Additional Information page 181

Eclipse Additional Information
12. Probe check window / Probe fit Run a probe check to ensure correct function of the OAE probe in the
ear canal. The probe check curves are generated by a number of clicks stimulated separately by the two
internal speakers within the OAE probe. Two individual curves are displayed in the probe check window.
If the probe is inserted correctly and both speakers function correctly, the output should be two steady
overlaying curves, as this indicates an airtight seal and low noise.
13. Levels of stimuli The two sound stimuli levels (F1 & F2) are automatically adjusted to correct levels.
The level test uses the same frequencies and levels as the DPOAE test. The difference in level is ad-
justed until the measured level equals the desired level.
14. DP-Response window Frequency response of a single DPOAE test, showing the two sound stimuli and
the position of the DP at 2f1-f2.
Use the arrows to increase/decrease the range of frequencies shown in the recording window.
15. 2f1-f2 point is indicated by red or blue colour and the frequency is labelled below. Each frequency bin dis-
played represents 3.7Hz.
Left/right arrow is used to see alternative DP frequencies. The grey area behind the frequency bars is the
averaged noise in the displayed grey noise bins.
16. DP Graph (DP gram or DP I/O)
The DPOAE Graph displays either a DP-Gram or DP I/O graph, depending on the test protocol.
When testing a DP-Gram, the F2 stimulus frequencies are listed on the horizontal x-axis. The vertical y-
axis represents the recorded DPOAE & Noise dB SPL level.
When testing a DP I/O test, the F2 stimulus intensities are listed on the horizontal x-axis.
The vertical y-axis represents the recorded DPOAE & Noise dB SPL level.
If the single DP level meets the set SNR (Signal to noise ratio), the F
given a checkmark to indicate the DPOAE has met the pass criteria and no further measurements will be
done at this frequency.
sound stimulus frequency will be
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