Frye FONIX 7000 - Manual (Page 114)

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FONIX 7000 Hearing Aid Analyzer
For most hearing aids, the most interesting part of the attack and release mea-
surements occurs at the beginning of each test. After the aid reaches its settling
amplitude, the test result just records a rather uninteresting flat line. The user
can zoom in on the beginning of the test by using [F6] and [F7]. These keys re-
scale the test results to show only the selected time interval. The beginning of
the interval is always the beginning of the test. The end of the interval is the
time selected by the user with [F6] and [F7] for the Attack and the Release tests,
respectively. The available time intervals range from 10 ms to 2000 ms. These
settings do NOT change the duration of the test.
Technical Details
• In order to determine the attack and the release times of the hearing aid,
the 7000 analyzer calculates the settling amplitude of each measurement
and uses the tolerance setting to achieve the final test result. The settling
amplitude is calculated by averaging the last 16 measurements of the test.
The attack (or release) time is the first time the aid reaches this ampli-
tude within the set tolerance. The tolerance is one of the settings that is
changeable in the local menu.
• Use [F1] to select ears. The 7000 analyzer can temporarily store one
Attack & Release test per ear. This data is erased by measuring over it,
pressing [RESET], or turning off the analyzer.
• The settings used for a displayed test are shown in a box to the right of
the attack graph. The settings that will be used when [START] is pressed
are shown below this box.