FONIX® 8000 - Frye Electronics

Real-Ear Measurements 171
6. Select the desired ear with [F1].
7. Level the sound field speaker. See Section 8.2.4.
8. Measure the unaided gain, if desired. See Section 8.4.3 for details.
9 Insert the hearing aid into the ear, being careful not to move the probe tube.
10. Use [F2] to select REAG 2. By default, this curve is set to 50 dB SPL (i.e., soft
speech). To adjust the input level, use the up-down arrow keys.
11. Select the signal source with the [F5] button. Digital Speech is a good source
type to use when measuring most hearing aids. (Press [F5] to open the pop-up
selection menu. Use the up-down arrow keys to make the desired selection.
Press the right arrow key to complete the selection and close the menu.)
12. Press [START] to take the measurement. When the frequency response has stabilized,
press [STOP] to stop the measurement.
13. Compare the measurement curve (Curve “6”) in the top graph to the “A” target.
When fitting to the prescription target, the Curve 6 should be within 5 dB of
Curve A. Make any necessary adjustments to the hearing aid fitting, and repeat
Step 12 above to make another measurement.
14. Use [F2] to select REAG 3, if desired, and repeat steps 11-13 to perform a measurement
at a different input level (default is 65 dB SPL) and compare Curve 7
to Target Curve A. (If you are using the NAL-NL1 or MOD NAL fitting formula,
the target curve automatically adjusts to the selected input level and source
type.) Repeat for REAG 4 and REAG 5, if desired.
15. Use [F1] to switch ears, if desired, and repeat the entire process for the other ear.
8.4.5 Measuring the Aided Gain in the Real-ear SPL Screen
1. Position the patient in front of the sound field speaker and place the earhook
and reference microphone on the ear. See Sections 8.2.1 and 8.2.2.
2. Insert the probe tube into the patient’s ear canal. See Section 8.2.3.
3. Input the patient’s audiogram to generate a target, if desired. See Section 8.3.
4. Press [EXIT] in the Audiogram Entry screen to return to the Real-ear Navigation
screen.
5. Enter the Real-ear SPL screen by using [F4] in the Real-ear Navigation screen.
6. Select the desired ear with [F1].
7. Level the sound field speaker. See Section 8.2.4.
8. Measure the unaided response, if desired. See Section 8.4.3 for details.
9 Insert the hearing aid into the ear, being careful not to move the probe tube.
10. Use [F2] to select REAR 2. By default, this curve is set to 50 dB SPL (i.e., soft
speech). To adjust the input level, use the up-down arrow keys.
11. Select the signal source with the [F5] button. Digital Speech is a good source
type to use when measuring most hearing aids. (Press [F5] to open the pop-up