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5. Measure Feedback
a. Prior to performing feedback measurement, ensure all noise sources in the fitting room are
reduced.
b. Select "Measure Feedback" in the Initial Fit screen. ELF will measure the maximum gain before
feedback. Results can be viewed in the Tuning tab, in the Fitting screen, by selecting the Gain
Display option (Figure 23).
c. Once measured, the software will automatically open to the Fitting screen.
d. If the maximum stable gain interacts with the gain prescription, feedback limits will automatically
be applied to the Current Fit Response (Figure 24).
NOTE- Gain can be increased beyond the feedback limits but may result in the patient
experiencing audible feedback.
Figure 23: Fine Tuning- Gain Curves displaying maximum stable gain data and feedback
limits applied for the left ear
Figure 24: Fine Tuning- Output Curves displaying feedback limits applied for the left ear
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