FONIX® FP35 Touch - Frye Electronics
FONIX® FP35 Touch - Frye Electronics
FONIX® FP35 Touch - Frye Electronics
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Chapter 4 97<br />
Automated Test Sequences<br />
There are several different automated test sequences available with the <strong>FP35</strong><br />
analyzer. One test sequence of your choice is included as a standard feature<br />
when the <strong>FP35</strong> is ordered. The other test sequences can be added as optional<br />
features.<br />
The available automated test sequence include: ANSI 96, ANSI 03, IEC 94, IEC<br />
05, JIS, and ISI.<br />
4.1 The ANSI Sequence<br />
The ANSI test sequence allows you to test hearing aids according to the ANSI<br />
S3.22 standard. You can use the ANSI test to control the quality of the hearing<br />
aids that you dispense. Compare the manufacturer’s specifications with your<br />
own ANSI measurements of an aid. If they do not conform within expected tolerances,<br />
you can contact the manufacturer.<br />
There are two versions of the ANSI S3.22 standard on the <strong>FP35</strong> analyzer: ANSI<br />
96 and ANSI 03. Check your hearing aid specification sheet to determine which<br />
standard was used on your hearing aid.<br />
Here are the major differences in the two versions of the standard:<br />
• When you set up an AGC aid for an ANSI 03 test sequence, you will start<br />
with its compression controls set to minimum (with the compression<br />
knee point set as high as possible). Just before the input/output measurements,<br />
the test sequence will pause to allow you to set the compression<br />
controls of the aid to maximum (with the compression knee point set as<br />
low as possible). In ANSI 96, AGC aids are tested with their compression<br />
controls set to maximum for all measurements.<br />
• When you adjust the gain control of the hearing aid midway through the<br />
ANSI 03 automated test sequence, the measured reference test gain value<br />
needs to be within 1.5 dB of the target value. In ANSI 96, the measured<br />
value needs to be within 1 dB of the target value.<br />
• The EIN formula in ANSI 03 uses a 50 dB SPL input instead of the 60 dB<br />
SPL input used in ANSI 96. With ANSI 96, any aid with a compression<br />
knee point below 60 dB SPL showed artificially high EIN results. This<br />
means that ANSI 03 EIN test results should be better (lower) for AGC<br />
aids.
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