102 FONIX FP35 Hearing Aid Analyzer
Figure 4.2.1B—IEC test results, I/O Screen
4.2.2 Defining the Function Keys
[F1] Selects aid type: LINEAR, AGC, or ADAPTIVE AGC.
[F2] Selects whether full-on gain curve will be run at 50 dB or at 60 dB.
[F3] Selects the reference test position to be 1600 Hz or 2500 Hz.
[F5] Levels the sound chamber.
4.2.3 Setting Up the Hearing Aid for Testing
1. Set the controls on the aid (except for compression controls) to give the
maximum output and gain.
2. Set the aid for the widest frequency response range.
3. Set AGC aids for maximum compression.
4. Make sure that the gain control of the aid is full on.
5. Set the aid up in the sound chamber as described in Chapter 3.
6. Press [F1] to select aid type.
7. Press [F2] to select between a full-on gain measurement at 50 dB or at 60 dB.
8. Press [F3] to select a reference frequency of 1600 Hz or 2500 Hz. Select 2500
Hz for high frequency emphasis aids.
