84 FONIX FP35 Hearing Aid Analyzer
3.8.7 Running a Three-Frequency Average
The ANSI and IEC automated test sequences call for running three frequency
average measurements. This can be done in the Coupler Multicurve screen
when the USER LEVEL is set to ADVANCED in the Default Settings menu. See
Section 2.3.2 for details.
To measure the three frequency average:
1. Select a signal type of NORM with [F4] in the Coupler Multicurve screen.
2. Check the bottom left corner of your screen. You should see one of three
messages: SINGLE, AVG, or IDLE. If the message is SINGLE or IDLE, you
will have to put the FP35 in AVG Mode. To do this:
a. Press [MENU].
b. Press [NEXT].
c. Select AVG FREQS using [∨, ∧].
d. Select the highest frequency of the three frequency average using [<, >].
See Section 2.5.1.6 for a complete listing of the available frequencies.
e. Select STATIC TONE using [∨, ∧].
f. Select AVERAGE using [<, >].
g. Press [EXIT] to return to the Coupler Multicurve screen.
3. Look at the display. The FP35 will now be automatically performing the
three-frequency average measurement. Adjust the amplitude using the [∨, ∧]
keys.
If you want to easily turn on and off the three-frequency average, press and
hold down the [F4] key to bring up the function key balloon menu. Use [∨, ∧] to
select SINGLE and press [START/STOP] to complete the selection. Now use the
[START/STOP] key to turn on and off the single pure-tone signal.
3.8.8 Measuring the Telecoil Response
Telecoil measurements can be performed in the Coupler Multicurve screen
using any source type available on the analyzer. During a telecoil measurement,
a magnetic field is used that is supposed to simulate the magnetic field of a
telephone receiver. Two devices can be used to produce this field: an external
telecoil board or the Telewand.
FP35 software setup
Follow these instructions to configure the FP35 for telecoil measurements in the
Coupler Multicurve screen.
1. Follow the instructions found in Section 2.5.8 to set up the FP35 Default
Settings Menu for telecoil measurements.
2. Press F3 from the Opening Screen to enter the Coupler Multicurve screen.
3. Press [MENU] to open the local menu.
