Using the FONIX 7000 to Verify Coupler and Real-Ear Performance ...

Real Ear Measurements 40
9. Press [F5] to enter the Visible Speech screen.
10. Press [MENU] to enter the Visible Speech Menu and ensure that the appropriate
target settings are selected. We have found that the optimal settings for visible
speech are to turn off smoothing and the min/max options.
NOTE: Use the UP/DOWN arrows to select a menu option and press the RIGHT arrow to
change a selection. Press [EXIT] to return to the visible speech screen.
Menu Options
Fitting Rule: NAL-NL1, POGO, BERGER, 1/3 Gain, ½ Gain, 2/3 Gain, Direct, NAL-RP
Age: Adult, 0-2mos, 3-6mos, 7-12mos, 1-2yrs, 2-3yrs, 3-4yrs, 4-5yrs, 5+yrs
Compression: 40-69 dB
Channels: 1-18+
Aid Limit: Multichannel, Wideband, None
Fit Type: Unilateral, Bilateral
Sound Field: 0°, 45°
Reference Position: Head Surface, Undisturbed
Noise Reduction: Off, 4X, 8X, 16X
SII Peaks: Measured
Smoothing: Off, On
Min/Max: Off, On
Figure 52 – Visible Speech Menu
11. Set up the patient for real ear measurements and level the sound-field speaker
as described in Section 2.1. Do NOT insert the hearing aid yet.
12. Use [F1] to select the appropriate ear and use [F2] to select the first envelope.
When navigating the function keys: press the UP/DOWN arrows to move the cursor up and down
and press the RIGHT arrow to make a selection and return to the test window.
Figure 53 – Select curve options
13. Press [START] to begin the test measurement as the clinician or a family
member begins speaking at an average, conversational level.
14. After approximately 15-30 seconds of measuring the live speech stimulus, press
[STOP] to store the envelope.
15. Insert the hearing aid into the patient’s ear, using special care not to move the
probe tube.