FONIX® 8000 - Frye Electronics

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88 FONIX <strong>8000</strong> Hearing Aid Test System 3.8 Custom Functions for F7/F8 The [F7] and [F8] keys can be customized to perform many different functions. This allows you to quickly adjust settings without going into the local menu. The following functions are available: • Display: Switch between Gain and SPL. • Coupler: Change the coupler type (2cc, CIC). • Bias Ampl: Change the amplitude of the bias signal (see Section 3.5.3) • Static: Turn on/off single tone or three frequency average (see Sections 3.4.5 and 3.4.6). • Batt Size: Change the battery size. This is used in battery current drain measurements. • Aid Type: Change the aid type (Standard, AGC, Adaptive AGC). This affects the delay times used in pure-tone sweeps and Digital Speech. • Off/Prev: Switch between the signal being in spectrum analysis mode (source off but measurement running) and at the previous selected amplitude level. • Data/Graph: Switch between displaying test results in numerical format and graphical format. The F7/F8 selections are set in the local menu. In the Coupler Multicurve screen, press [MENU] to open the local menu. Change the F7 and F8 selections using the arrow keys. The default selection for these settings can be changed in the Setup Menu. See Sections 2.2.1 and 2.2.4 for details. 3.9 Complete List of Menu Items The function of all items in the local menu of the Coupler screen are described in this section. Enter the local menu by pressing [MENU] in the Coupler screen. Selections are made by using [, ] to choose an item and [, ] to change the setting. There is a dotted or dashed line in between an item and its selection. If the line is dotted, the selection will only effect the Coupler screen. If the line is dashed, the selection is global and will have an effect on other measurement screens. The local menu is divided into five main categories: Display, Measurement, Source, Aid and Misc Settings. To skip ahead to the next category, use the [START] button. Display Settings • Data/Graph: The method of data display. Choose between DATA (numerical data) and GRAPH.
Coupler Multicurve 89 • Display: Type of display. Choose between SPL (output) and Gain (difference between input and output). • Graph Scale: Scaling used when making measurements. NORMAL scales to the upper-most curve. AUTO scales to the current selected curve. • Curve Label: Label used for the two available “ears.” Choose between LEFT/RIGHT and A/B. Measurement Settings • Coupler Type: The type of coupler being used in making sound chamber measurements. A selection of CIC turns on corresponding software correction factors (see Sections 3.6). A selection of 2CC does not apply correction factors to the curve, but will note a 2-cc coupler was used in the COR column of the Curve Characteristics Box. The NONE selection will apply no corrections and leave the COR column blank. • Distortion: Type of harmonic distortion used in a pure-tone measurement. Choose between 2nd, 3rd and TOTAL. See Section 2.3.1.3. • Noise Red (Tone): Amount of pure-tone noise reduction used. See Section 2.3.1.1. • Noise Red (Comp): Amount of composite noise reduction used. See Section 2.3.2.1. Source Settings • Output Trans: Transducer used for the measurement. CHAMBER uses the test box. TELECOIL uses the built-in telecoil. TELEWAND uses the external telecoil connector that connects to the Telewand. • Static Tone: Status of individual measurement. Choose SINGLE to emit a static tone in between composite measurements or pure-tone sweeps. Choose AVG to emit a three frequency average between other measurements. • Bias Tone: Amplitude of the bias tone used with Digital Speech. OFF turns the bias tone off entirely. • Composite Type: Type of composite signal used. Choose between STANDARD and CHIRP. See Section 2.3.2.4. • Composite Filter: Filter used in Composite and Digital Speech measurements. Choose between ANSI, ICRA and FLAT. Aid Settings • Aid Type: Type of hearing aid being measured. Choose between Linear, AGC and ADAPTIVE AGC. • Avg Freqs: Selection of three frequencies used in a three frequency average. See Section 2.2.4.
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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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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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Appendix H 229 The FONIX Keyboard A
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