Ansi/Iec Hearing Aid Tests; Ansi S3.22-2003 And Ansi S3.22-2009 Facts; Ansi 2003 And 2009/Iec Tests - audioscan verifit User Manual

16 ANSI/IEC Hearing Aid Tests

These tests follow the procedures of the ANSI S3.22-2003 standard:
ANSI: An automated test sequence for hearing instruments per ANSI S3.22-2003.
ANSI / IEC: An automated test sequence for hearing instruments per ANSI S3.22-2009 and IEC 60118-7.
Input/Output: 1 - 4 curves of coupler SPL vs input SPL at .25, .5, 1, 2 and 4 kHz.
Telecoil: Tests for telephone sensitivity using a telephone magnetic field simulator (TMFS) in the tele-test
handset and test loop sensitivity using a large coil in the test chamber floor.

ANSI S3.22-2003 and ANSI S3.22-2009 facts

ANSI S3.22-2003 and ANSI S3.22-2009 have been designated a recognized standard by the FDA and are
mandatory for reporting test data.
ANSI S3.22-2009 and IEC 60118-7 have been harmonized. There is no difference between these standards.
The only difference between ANSI S3.22-2003 and ANSI S3.22-2009 is that ANSI S3.22-2003 includes attack
and release tests.
Full-on gain is determined with 50 dB input SPL and frequency response curves are run at 60 dB SPL for all
aids.
The OSPL90 curve, the HFA (or SPA) and peak value of this curve, the frequency of the peak, the HFA (or
SPA) full-on gain are determined at full-on gain setting. The response curve, frequency range, Reference Test
Gain, battery drain, equivalent input noise, distortion, attack and release times are determined at RTS.

ANSI 2003 and 2009/IEC tests

1. Click the right mouse button to raise the home menu, then select [ANSI] for ANSI 2003 or [ANSI / IEC] for
ANSI 2009 depending on what has been selected in Setup.
2. Click [Start test] and follow the test setup instructions which are presented.
3. Refer to Test Box Measures – Setup, Coupling the hearing instrument, Positioning the hearing instrument
and Battery pill use and care to prepare the instrument for testing.
4. Turn the instrument ON.
5. Set the gain control (manual or programmable) to maximum with all other controls set to provide the widest
frequency response, greatest gain and highest maximum output. AGC controls and/or programmable
parameters should be set to minimize AGC action (AGC off or threshold high, compression ratio close to 1).
6. Click to run the test or click
the test to request that the gain control be adjusted to the Reference Test Setting (RTS). If necessary, open
the test box and, without moving the hearing instrument, adjust the gain control until the large vertical arrow
on the screen prompt disappears. Press
During the ANSI S3.22-2003 test, the Verifit will pause to request that AGC controls or programmable
parameters be set for maximum AGC effect. If the manufacturer does not provide settings to produce maximum
AGC effect, use settings that result in the highest gain for soft sounds and the lowest gain for loud sounds. This
will typically result in the lowest compression threshold, a flat I/O curve and the longest attack/release times.
These are not 'typical' characteristics but indicate the adjustment range possible for these parameters.
Verifit ® User's Guide Version 4.8 © November 2016
to abort the test. Note that, if required, the Verifit will pause during
to resume the test.
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