Frye FONIX FP40D - Manual (Page 60)

52 FONIX FP40 Portable Hearing Aid Analyzer
6. Press START/STOP once the measurement has stabilized. Compare the reverse measurement
to the forward measurement to see the directional advantage that the aid provides.
Figure 3.6.3 —Testing the reverse coupler response of a directional aid
3.7 The CIC Option
The CIC Option is a way of performing a coupler test of a CIC hearing aid that more accurately
reflects the real-ear performance of that aid than a regular 2-cc coupler measurement. It is not a
way to check the manufacturing specifications of CIC hearing aid because those specifications are
based upon 2-cc coupler measurements.
The CIC Option consists of a CIC coupler and software correction factors. Both need to be used in
order to correctly perform the measurement.
To measure a CIC hearing aid:
1. Attach the CIC coupler to the CIC aid just as you would attach an HA-1 coupler to the aid,
and set the hearing aid up for testing as shown in Section 3.3.2.
2. Press F1 to enter the General Setup Menu.
3. Use the AMPLITUDE and FREQUENCY knobs to select MAIN F2 or MAIN F3.
4. Press START/STOP repeatedly to select CIC.
5. Press F1 to return to the Main Coupler Screen.