136 FONIX FP35 Hearing Aid Analyzer
Figure 5.4.2B—Insertion gain
5.4.3 Automatic Testing
The FP35 analyzer has the capability of performing automatic real-ear aided
measurements. This feature automatically tests the three aided measurements
automatically without needing user intervention between measurements. Auto
Test always measured AIDED 1, 2, and 3, in that order.
To enable auto test:
1. Press [MENU] in the real-ear measurement screen.
2. Use [
∨, ∧] to select AUTO TEST and set it to ON.
3. Press [EXIT] to close the menu.
4. Press [START/STOP]. The analyzer will automatically test AIDED 1, AIDED
2, and AIDED 3.
The Auto Test feature can be defaulted to on. See Section 2.3 for details.
5.4.4 Testing Directional Hearing Aids
The Insertion Gain screen is a good place to perform a directionality test for
directional hearing aids. In an insertion gain measurement, the unaided curve
is subtracted from the aided curve in order to arrive at the insertion gain curve.
You can use this functionality in order to find out how much advantage the
directional microphones of the hearing aid are providing.
