134 FONIX FP35 Hearing Aid Analyzer
Figure 5.4.1—Unaided response
8. If you used the composite signal for testing, use the [<,>]keys to show the
last four measurements taken while the signal source was running.
Note: To display the average unaided measurement, set UNAIDED to AVERAGE
in the menu. Then select AVG UNAIDED with [F2] and turn ON its display with
[F3].
5.4.2 Measuring the Aided Response
The second step in an insertion gain measurement is the aided response.
If you would like to view the measurement as an insertion gain curve and com-
pare it to an insertion gain target, take this measurement from the Insertion Gain
Screen. If you would prefer to view the aided gain, take this measurement from
the Unaided & Aided Response Screen.
Whenever you take a measurement in one of these screens, it will automatically
be converted and placed into the other screen.
To take an aided measurement:
1. Place the aid into the client’s ear taking care not to drag the probe tube fur-
ther into the ear canal. Once the aid is in the ear, the red mark on the probe
tube should be at the same position it was for the unaided test. (See Figure
5.2.4C.)
