168 FONIX FP35 Hearing Aid Analyzer
The sections in this chapter will explain the following:
• 6.1:Targetcreation
• 6.2:Displays
• 6.3:Measurements
• 6.4:Reference
6.1 Target Creation
In order to create a target for use in the Coupler Target screen or the Coupler
EarSim screen, you must enter the Audiogram Entry screen, just as you would if
you were creating a normal real-ear target.
1. Enter the Audiogram Entry screen by pressing [F2] from the Opening screen
and using the [NEXT] and [BACK] keys if necessary.
2. Follow the instructions found in Section 5.3 to enter the patient’s audiogram
and to create a real-ear target.
3. Follow the instructions found in Section 5.3.6, if desired, to measure the
patient’s RECD.
4. Press [EXIT] to return to the Opening screen.
5. Press [F3] to enter one of the coupler multicurve screens. Use the [NEXT]
and [BACK] keys to enter the Coupler Target screen or the Coupler EarSim
screen.
6. Press [MENU] and [BACK] to enter the Target menu. Set the FIT RULE, AGE,
and AID TYPE in this menu using the arrow keys. If you select NAL-NL1 as
your FIT RULE, you will also have to set COMPRESSION, CHANNELS, AID
LIMITING, FIT TYPE, TUBING, and VENT. See Section 5.3.4 for details.
7. Press [EXIT] to return to the measurement screen. You are now ready to per-
form the measurements and compare them to the displayed target.
The Coupler Target screen converts the real-ear target into a coupler target dis-
played in either dB GAIN or dB SPL. The Coupler EarSim screen displays real-
ear targets in either dB IG (insertion gain) or dB SPL. When the Coupler EarSim
display is set to dB SPL, the patient’s HTL and UCL values are also displayed.
To switch between the gain and SPL displays in each screen, use the [MENU]
key to open the local menu, and use the arrow keys to select GAIN or SPL in the
DISPLAY field. [EXIT] will close the local menu.
Targets are usually tied to the source type and source level of CRV 2. If you
would like to tie the target to a different curve, or to the currently selected
curve, change the TARGET REF setting in the Target menu. See Section 6.3.3.
If you have modified the actual numerical target values in the Audiogram Entry
screen, or entered your own target entirely, you will not be able to enter the
Target menu from the Coupler Target or Coupler EarSim screens. This is because
