154 FONIX 7000 Hearing Aid Analyzer
4. Use [<, >] to select DATA.
5. Press [EXIT] to return to the Real-ear SPL screen. The numerical data dis
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play will be shown.
6. Use [F2] to select the curve data you want to display.
6.4.10 Deleting and un-displaying measurements
It is often convenient to temporarily clear one or more of the measurement
curves without deleting them.
To turn off/on the display of a curve without deleting it:
1. Press [F3] to open the pop-up menu with the curve selections.
2. Use [∨, ∧] to select the curve you want to turn off or on.
3. Use [>] to toggle the display of the selected curve and close the menu.
Alternately, press [START] to toggle the display but leave the pop-up menu
open. This will allow you to quickly make another display change without
closing the menu. Press [F3] to close the menu.
Note: The status of each curve is displayed in the Curve ON/OFF menu. ON
means the curve is measured and displayed. OFF means the curve is measured
and not displayed. NO means the curve has not been measured.
To permanently delete a curve:
1. Press [F2] to select the curve you want to delete.
2. Use [F4] to delete the selected curve. The following selections are available:
• DELETE SELECTED CURVE: Deletes the curve but retains the curve set
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tings such as the source type and source level.
• DELETE SELECTED CURVE AND SETTINGS: Deletes the curve and
return the source type and level to their default settings.
• DELETE ALL CURVES: Deletes all curves but retains the curve settings.
• DELETE ALL CURVES AND SETTINGS: Deletes all curves and returns
curve settings to their default selections.
6.4.11 Using Smoothing in measurement curves
Smoothing averages together points in a response measurement in order to
achieve a smoother response curve. This is useful for reducing artifacts that
might be introduced in a noisy testing environment, but it can also decrease
the accuracy of the curve. See Figure 6.4.11 for a comparison of a measurement
curve with and without smoothing.
In composite log smoothing:
• From 200 Hz–2000 Hz, measured data points from three consecutive fre
-
quencies 100 Hz apart are averaged to get the curve point at the center
frequency.
• From 2000 Hz–3000 Hz, measured data points from five consecutive fre
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quencies 100 Hz apart are averaged to get the curve point at the center
frequency.
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