98 FONIX FP35 Hearing Aid Analyzer
4.1.6 Running an ANSI Test
After making any necessary menu selections as described in Section 4.1.8, lev-
eling the sound chamber as described in Section 3.2, and setting up the aid as
described in Section 3.3, follow these instructions:
1. Press [START/STOP] to begin the test.
2. Usually the FP35 will pause during the measurement process in order to let
you adjust the gain of the hearing aid to the reference test position.
a. Lift the sound chamber lid and adjust the gain control of the aid until the
MEASURED gain matches TARGET gain.
b. Close the sound chamber lid when finished.
c. The MEASURED gain should be within 1 dB of the TARGET gain. (ANSI
03 only requires that you match the target within 1.5 dB.)
3. Press [START/STOP] to continue the test sequence. If you have enabled the
telecoil test, do the following. Otherwise, skip to step 4.
a. Wait for the analyzer to pause for you to set up the hearing aid for the
telecoil test.
b. Set the hearing aid to telecoil mode and position it for maximum output.
See Section 3.8.7 for instructions on how to determine this position.
c. Press [START/STOP] to run the telecoil measurement.
d. Wait for the analyzer to pause, set the hearing aid back into microphone
mode, and reposition the hearing aid in the test box.
e. Press [START/STOP] to continue the ANSI test sequence.
4. If you are measuring an ANSI test, push [START/STOP] to continue the
test. If you are measuring to ANSI 03 and have set the aid type to AGC or
ADAPTIVE, the analyzer will pause again after several measurements have
been taken. Adjust the AGC controls of the aid to have maximum effect (or
as specified by the manufacturer) and press [START/STOP] again to com-
plete the test sequence. The analyzer will not pause if the ANSI TEST is set
to S3.22-1996 or if AGC SWITCHING is OFF in the local menu. (See Section
4.1.5)
5. Press [NEXT] to view the ANSI I/O Screen for AGC aids.
6. Press [PRINT] for a hard copy of the results.
4.1.7 Testing Digital Hearing Aids
The ANSI S3.22 “labeling” standard for hearing aids was not designed with digi-
tal hearing aids in mind. In fact, most of the testing methods employed by ANSI
have been around since the 1970s. However, since ANSI is a standard, in order
to conform to that standard, it must use only the testing techniques outlined
in the standard. For this reason, the FP35 has no provisions for incorporating
composite or digital speech into the ANSI 96 or ANSI 03 test sequences.
