FONIX® 8000 - Frye Electronics

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154 FONIX <strong>8000</strong> Hearing Aid Analyzer SANITATION NOTICE Do not reuSe ProBe tuBeS. use a new probe tube for each ear to prevent the possible spread of infection. Sterilization of probe tubes is not possible, and germicidal solutions can leave a residue inside the tubing which can result in errors. Do not cut off any portion of the tube. Do not reuSe inSert earPHone eartiPS. insert earphone eartips are used primarily for performing recD and audiometric measurements. Sterilization of these eartips is not possible. When performing these measurements, make sure to use a new ear tip for each patient. You may spread infections if you reuse insert earphone eartips.
Real-Ear Measurements 155 Method 2 This method uses the Composite signal and the fact that there is a dip in gain inside the ear caused by a standing wave created by the 7 kHz frequency reflecting off the eardrum. 1. Press [F2] to enter the Real-Ear Navigation screen from the Opening screen. 2. Press [F3] to enter the Insertion Gain screen. 3. Press [F5] to select the Composite signal as the source type. 4. Press [START] to start a measurement. 5. Insert the probe tube carefully, looking at the composite measurement. At some point, there will be a large dip below the 0 dB level at 7 kHz caused by the standing wave inside the ear. Keep inserting the probe tube until that dip goes away and the unaided response is above 0 dB gain between 7 kHz and 8 kHz. See Figure 8.2.3B. 6. Press [EXIT] to return to the Real-Ear Navigation screen. Hints: To help keep the probe tube in place, position the tube so that it runs through the tragal notch, resting against the lower edge of the tragus. If necessary, reposition the body of the probe microphone lower on the Velcro button of the ear hanger. If desired, use surgical tape to hold the tube in position. Figure 8.2.3B—Unaided response with correct insertion of the probe tube
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100 FONIX 8000 Hearing Aid Test Sys
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Page 153 and 154: Chapter 7 145 The ISTS Test The IST
Page 155: The ISTS Test 147 No HL 250 Hz 375
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Page 207 and 208: Appendix A 199 Specifications ACOUS
Page 209: Specifications 201 Size: 11.5"W x 1
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Appendix C 209 Calibration There ar
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Calibration 211 6. Thread the probe
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Appendix G 223 Glossary of Terms AG
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Glossary of Terms for the FONIX 800
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Glossary of Terms for the FONIX 800
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Appendix H 229 The FONIX Keyboard A
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FONIX® 8000 - Frye Electronics

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