202 FONIX FP35 Hearing Aid Analyzer
3. Close the sound chamber.
4. Press [START/STOP].
5. When the calibration is complete, press [EXIT] to return to the Microphone
Calibration Screen.
D. Storing the Microphone Calibration
1. Press [F5] in the Microphone Calibration Screen.
2. Press [START/STOP].
E. Insert Earphone Calibration
Before you can perform RECD or audiometric measurements, it is necessary to
calibrate the insert earphone(s) that you will be using. The calibration for the
insert earphones is based on the ANSI S3.6-1996 specifications. There is no
need to specifically calibrate individual HL levels because the following calibra-
tion procedure provides a sufficiently stable reference.
RECD coupler setup
1. Insert the insert earphone into the “earphone” jack on the back of your ana-
lyzer.
2. Plug the other end of the insert earphone into the tubing of the ear level
adapter attached to an HA-2 coupler. See Figure C-2.
3. Insert coupler microphone into the HA-2 coupler. See Figure C-3.
4. From the Opening Screen, press [MENU] to enter Default Settings Menu.
5. Press [F3] to enter the Calibration Screen.
6. Press [F4] to enter the Earphone Calibration Screen.
Figure C-2—Insert earphone connected to Figure C-3—Coupler microphone inserted into
ear level adapter and HA-2 coupler HA-2 coupler
