78 FONIX FP35 Hearing Aid Analyzer
4. Enter the Coupler Multicurve screen.
5. Press [MENU] to open the local menu.
6. Use the arrow keys to make sure that DISPLAY is set to GAIN and REF MIC
is set to OFF.
7. Press [NEXT] to enter the Advanced menu.
8. Use the arrow keys to change LEVELING SOURCE to 70 dBSPL.
9. Press [EXIT] to close the local menu and return to the Coupler Multicurve
screen.
10. Hold the measurement microphone about six inches from the speaker, and
press [F5] to level it. See Figure 3.8.2B. See Section 3.2.4 for information on
changing the leveling source.
Figure 3.8.2B—Hold microphone six inches from the speaker
11. Attach the hearing aid to the appropriate coupler, and insert the measure-
ment microphone, as you would for normal coupler testing. See Section 3.3.
12. Use [F1] to select CRV 1.
13. Use [F4] to select the source type for the test. It is recommended to use
COMP or DIG SPCH, if available. Alternately, use the FAST pure-tone
sweep.
14. Use [∨, ∧] to select the desired source level. It is recommended to use 65 dB
SPL.
15. Hold the hearing aid, connected to the coupler and the microphone, six
inches in front of the speaker so that the hearing aid is pointed forward. See
Figure 3.8.2C.
