142 FONIX FP35 Hearing Aid Analyzer
4. Press [F5] to level.
5. Have the client turn the aid on and set the gain control to the normal use
level.
6. Use [F2] to select AIDED 1.
7. Use [F4] to select the source type for AIDED 1, and use the [
∨, ∧] keys to set
the source amplitude
8. If necessary, adjust noise reduction and output limiting with [MENU].
9. Have the client resume the position they were in during leveling, and
remind them to stay still while the signal is on.
10. Press [START/STOP] to test. If you are using the COMP, DIG SPCH, or FAST
signal source, you will need to press [START/STOP] again to stop the signal.
11. Repeat steps 6 through 10 for AIDED 2 and AIDED 3.
In general, AIDED 1 is tested at low levels (50 dB SPL) to make sure soft sounds
are above the patient’s threshold values. AIDED 2 is tested at medium levels
(65-70 dB SPL) to make sure that the aid meets the target. AIDED 3 is tested at
loud levels (90 dB SPL) to make sure that loud sounds are beneath the patient’s
UCLs.
Note: See Section 5.4.5 for information on testing open fit hearing aids.
Figure 5.5.2—SPL display with measurements
