FONIX® 8000 - Frye Electronics

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50 FONIX 8000 Hearing Aid Test System 2.6 Computer Connection The FONIX 8000 Test System is equipped with an RS232 connection that will allow you to connect to a personal computer and exchange data. You will also need a software program, such as WinCHAP, on your Windows computer that can communicate with the analyzer. It is possible to make your own program using the FRYERS protocol. See www.frye.com for details. 2.7 Leveling Leveling is the process by which the response of the sound chamber or sound field is measured and computer-corrected so that a flat sound field is achieved. Sound chamber leveling can be saved into permanent memory. Here are some technical details on the leveling status messages. • UNLEVELED: Leveling has not been attempted and sound is uncorrected. • LEVEL_ERROR or LEVEL_FAILED: An error happened during leveling and source is uncorrected. • LEVELED: Leveling has been achieved within ± 0.25 dB between 260– 6000 Hz and ± 0.5 outside that frequency range for sound chamber leveling or within ± 1 dB between 260–6000 Hz and ± 2 dB outside that frequency range for real-ear leveling. • SEMI_LEVELED: Leveling has been achieved between ± 0.25 dB and ± 0.5 dB between 260–6000 Hz and between ± 0.5 and ± 1.5 dB outside that frequency range for sound chamber leveling or between ± 1 dB and ± 2 dB between 260–6000 Hz and between ± 2 dB and ± 6 dB outside that frequency range for real-ear leveling. • WEAK_LEVELED: Tolerances are the same as SEMI-LEVELED but the maximum output for the speaker is less than 100 dB for coupler measurements or 80 dB for real-ear measurements. To achieve a louder signal, the speaker needs to be moved closer to the analyzer microphone and re-leveled. If a leveling error occurs during sound chamber leveling, check the connections of the sound chamber and the microphone, and make sure that you are getting noise out of your sound chamber. If those connections are good, your microphone is probably in need of calibration or it is damaged. It is also possible that your sound chamber speaker is damaged, but this is unlikely. Contact the factory or your local FONIX distributor if you continue to have problems with leveling.
Chapter 3 51 Basic Sound Chamber Tests In the Coupler Multicurve screen, you can view measurement curves in dB SPL or dB Gain, and run them with Composite, Digital Speech, or pure-tone signals. You can display up to 10 curves on the Coupler screen at the same time. From the Opening screen of the FONIX 8000 Test System, enter the Coupler Multicurve screen by pressing [F1]. The Coupler Multicurve screen can be set as the screen that appears when the FONIX 8000 Test System is powered or the [RESET] button is pressed. See Section 2.2.1 and 2.2.4 for details. 3.1 The Coupler Multicurve Screen Display The display of the Coupler Multicurve Screen varies depending upon whether you have chosen a pure-tone source or a composite (including Digital Speech) source. 3.1.1 Viewing a Pure-tone Display Figure 3.1.1—Coupler Multicurve Screen with pure-tone source
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Chapter 7 145 The ISTS Test The IST
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The ISTS Test 147 No HL 250 Hz 375
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150 FONIX 8000 Hearing Aid Analyzer
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Appendix A 199 Specifications ACOUS
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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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