FONIX® FP35 Touch - Frye Electronics

Coupler Measurements 65
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 space in a person’s ear canal.
The procedure for connecting a
hearing aid to those couplers is
described in this section.
If you want to measure bat-
Figure 3.3—Battery pill cable connection location.
tery current drain, you should
also insert a battery pill into the hearing aid. The battery pill cable plugs into a
2.5mm connector at the base of the internal sound chamber. (See Figure 3.3)
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 on to
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