62 FONIX FP35 Hearing Aid Analyzer
3.3 Hearing Aid Setup
To set up the analyzer and the hearing aid for testing, you connect the hearing
aid to a coupler. The standard couplers of the FP35 analyzer are the HA-1 and
HA-2 couplers. These couplers contain 2 cc of space, simulating the amount of
place in a person’s ear canal. The procedure for connecting a hearing aid those
couplers are described in this section.
Other available couplers include the MZ-series couplers (used in the OES and
JIS Options) and the CIC coupler.
3.3.1 Setting up a BTE
1. Adjust the tone and gain controls of the aid to the desired positions.
2. Insert the end of the earhook of the hearing aid into the plastic tubing of the
ear level adapter.
3. Insert the measurement microphone into the HA-2 coupler.
4. Snap the ear level adapter only the end of the coupler.
5. Place the hearing aid/coupler assembly into the sound chamber so that the
microphone of the aid is directly over the center of the speaker. The Velcro
on the coupler will help secure the assembly in place. See Figure 3.3.1.
Figure 3.3.1—Setup for a BTE
