Verifit
®
User's Guide Version 4.8 © November 2016
ANSI test results
Full-on average gain (1) is measured with a 50 dB input SPL, average gain at RTS (2) is always measured at 60
dB input SPL and the frequency response curve (3) is always run at 60 dB input SPL.
ANSI input-output curves
An input/output curve shows the output level of a hearing instrument as a function of input level and frequency.
It is a steady-state pure-tone curve and does not reflect performance with complex signals such as speech.
You may run the tests at any setting of the instrument controls but ANSI S3.22 requires that certain settings be
used. See ANSI S3.22-2003 and ANSI S3.22-2009 facts. The [Input/Output] test allows you to generate up to 4
separate input/output curves at each of 5 individual frequencies (250, 500, 1000, 2000, 4000 Hz) as provided in
ANSI S3.22.
1. Click the right mouse button to raise the home menu, then select [Input/Output].
2. Refer to Coupling the hearing instrument and Positioning the hearing instrument to prepare the instrument
for testing.
3. Turn the instrument ON; set AGC controls or programming parameters as in ANSI or ANSI / IEC tests
4. Click [Curve 1]. Test setup instructions will be displayed.
5. Press to generate a set of 5 input/output curves.
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