FONIX® 8000 - Frye Electronics
FONIX® 8000 - Frye Electronics
FONIX® 8000 - Frye Electronics
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100 FONIX <strong>8000</strong> Hearing Aid Test System<br />
For most hearing aids, the most interesting part of the attack and release measurements<br />
occurs at the beginning of each test. After the aid reaches its settling<br />
amplitude, the test result just records a rather uninteresting flat line. The user<br />
can zoom in on the beginning of the test by using [F6] and [F7]. These keys rescale<br />
the test results to show only the selected time interval. The beginning of<br />
the interval is always the beginning of the test. The end of the interval is the<br />
time selected by the user with [F6] and [F7] for the Attack and the Release tests,<br />
respectively. The available time intervals range from 10 ms to 2000 ms. These<br />
settings do NOT change the duration of the test.<br />
Technical Details<br />
• In order to determine the attack and the release times of the hearing aid,<br />
the <strong>8000</strong> analyzer calculates the settling amplitude of each measurement<br />
and uses the tolerance setting to achieve the final test result. The settling<br />
amplitude is calculated by averaging the last 16 measurements of the test.<br />
The attack (or release) time is the first time the aid reaches this amplitude<br />
within the set tolerance. The tolerance is one of the settings that is<br />
changeable in the local menu.<br />
• Use [F1] to select ears. The <strong>8000</strong> analyzer can temporarily store one<br />
Attack & Release test per ear. This data is erased by measuring over it,<br />
pressing [RESET], or turning off the analyzer.<br />
• The settings used for a displayed test are shown in a box to the right of<br />
the attack graph. The settings that will be used when [START] is pressed<br />
are shown below this box.