96 FONIX FP35 Hearing Aid Analyzer
4.1.3 Leveling
Before you run an ANSI test, you should make sure the sound chamber is lev-
eled. Even if the screen says that the chamber is leveled, it is a good idea to
periodically re-level it to account for any differences that might have entered
into the testing environment.
The ANSI standard requires that you do a special leveling that accounts for
everything that will be in the chamber during the test. If your unit has the
Real-Ear Option, you can level using the reference microphone as described in
Section 3.2.2. Otherwise, follow the procedure described in Section 3.2.1.
Note: For most clinical purposes, the standard leveling procedure (not using the
reference microphone) is adequate.
4.1.4 Switching between ANSI 96 and ANSI 03
To switch between ANSI 96 and ANSI 03, first enter the ANSI test screen
by using either [F4] or [F5] from the Opening screen: select the function key
labeled either ANSI 96 or ANSI 03. From the ANSI screen, push [MENU] to
open the local menu. Use [∨, ∧] to select ANSI TEST and [<,>] to switch
between S3.22-1996 and S3.22-2003. After switching between the standards,
you must press [MENU] twice to update the local menu if you want to make
any further menu changes.
For instructions on changing the default ANSI test selection, see Section 2.3; the
ANSI TEST selection is available in the Advanced Default Settings screen.
4.1.5 Setting up for ANSI testing
The hearing aid controls must be set to conform with ANSI requirements for the
test results to be valid.
1. Set the controls on the aid (except for the compression controls) to give the
greatest possible output and gain.
2. Set the aid for the widest frequency response range.
3. For ANSI 96, set AGC aids to achieve the greatest possible compression or as
otherwise specified by the manufacturer. For ANSI 03, set the compression
controls to have minimum effect or as specified by the manufacturer.
4. If you are testing a digital hearing aid, put it in “test” mode if possible.
5. Set the gain control to full-on.
6. Set the aid up in the sound chamber as described in Section 3.3. If you lev-
eled with the reference microphone on, you can turn it off for measurement
purposes — just make sure to leave it in place in the sound chamber.
7. To measure the telecoil function, follow the instructions in Section 2.5.8
to enable telecoil measurements on the FP35. Then use [F4] in the ANSI
Screen to turn on the ANSI telecoil test.
