FONIX® 8000 - Frye Electronics
FONIX® 8000 - Frye Electronics
FONIX® 8000 - Frye Electronics
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vi FONIX <strong>8000</strong> Hearing Aid Test System<br />
8.5.3 Testing the digital filters. .......................................................................181<br />
8.5.4 Testing digital noise suppression. ..............................................................182<br />
8.6 Directional Hearing Aids .............................................................................183<br />
8.6.1 Using the insertion gain technique. ............................................................183<br />
8.6.2 Determining the “null” ........................................................................185<br />
8.7 Open Ear Hearing Aids. ..............................................................................185<br />
8.8 Visible Speech .......................................................................................186<br />
8.8.1 Performing Visible Speech measurement ......................................................187<br />
8.8.2 Viewing the Real-time Visible Speech Display .................................................188<br />
8.8.3 Viewing Completed Test Results ...............................................................188<br />
8.8.4 Measuring multiple envelopes .................................................................189<br />
8.8.5 Using the Reference Microphone ..............................................................190<br />
8.8.6 Technical Information about the Speech Intelligibility Index ..................................190<br />
8.9 CROS/BICROS Aids ..................................................................................193<br />
8.9.1 Measuring the Head-Baffle Effect ..............................................................193<br />
8.9.2 Measuring the Overcoming of the Head-Baffle Effect ..........................................194<br />
8.9.2.1 CROS ...................................................................................194<br />
8.9.2.2 BI-CROS ................................................................................195<br />
8.9.3 Measuring Overall Insertion Gain .............................................................195<br />
8.9.3.1 CROS ...................................................................................196<br />
8.9.3.2 BI-CROS ................................................................................196<br />
8.9.4 Measuring Insertion Loss to the “Good” Ear (CROS) ...........................................197<br />
Appendix A: Specifications .......................................................................................................... 199<br />
Appendix B: <strong>8000</strong> Software Upgrades ....................................................................................... 203<br />
Appendix C: Calibration ................................................................................................................ 209<br />
Appendix D: Troubleshooting Guide ........................................................................................... 213<br />
Appendix E: The FONIX CIC Feature ........................................................................................... 215<br />
Appendix F: Fitting Formula Tables ............................................................................................ 219<br />
Appendix G: Glossary of Terms .................................................................................................... 223<br />
Appendix H: The FONIX Keyboard App ..................................................................................... 229<br />
Index ................................................................................................................................................ 231
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