FONIX® 8000 - Frye Electronics

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188 FONIX <strong>8000</strong> Hearing Aid Analyzer 8.8.2 Viewing the Real-time Visible Speech Display During the Visible Speech test, the analyzer displays four changing measurement curves: • Real-time measurement curve showing the immediate response of the hearing aid • Average frequency response of the hearing aid over the time of the test • Maximum amplitude of the response per frequency (optional) • Minimum amplitude of the response per frequency (optional) • Reference microphone frequency response measured outside of the ear (optional) These measurements together give the clinician both the real-time response of the hearing aid and information about its response over the time of the test. Press [STOP] when the average response curve has stabilized. This may take 30-60 seconds. The minimum and maximum amplitude curves can be turned off by adjusting the Min/Max setting in the local menu. 8.8.3 Viewing Completed Test Results When the Visible Speech measurement is stopped, the following changes occur: • The region around the average frequency response curve is darkly shaded. This region represents the standard deviation of the average response curve. That is, the area containing most of the frequency response curves measured during the test. • The real-time measurement curve disappears. Since this curve represents the latest measurement of an ever-changing speech signal, it is not relevant to the overall test results displayed upon test completion. • The region between the minimum and maximum response curves is lightly shaded. This indicates the entire region of the frequency response of the hearing aid over the time of the test. If desired, you can turn off this part of the display by adjusting the Min/Max setting in the local menu. See Figure 8.8.3 for an example of a completed Visible Speech measurement. The curves consisting of Envelope 2 are labeled: • 2U—Represents the maximum response per frequency over the time of the test. • 2u—Represents the upper boundary of the standard deviation around the average frequency response. • 2M—Represents the average frequency response of the test. • 2l—Represents the lower boundary of the standard deviation around the average frequency response. • 2L—Represents the minimum response per frequency over the time of the test.
Real-Ear Measurements 189 Other Visible Speech envelope measurements are labeled similarly using the number of the envelope. Figure 8.8.3—Completed Visible Speech test. 8.8.4 Measuring multiple envelopes The clinician can measure up to three different Visible Speech envelopes. For example, it may be beneficial to perform measurements of the different programs on the hearing aid. Another example of the usefulness of multiple measurements is when using the voice of the spouse of the patient. Have the spouse stand a few feet from the patient when measuring Visible Speech Envelope 1. Then use [F2] to select Visible Speech Envelope 2. (Press [F2]. Use [, ] to select the desired envelope. Press [] to complete the selection and close the pop-up menu.) Repeat the test with the spouse standing across the room from the patient. A comparison of the two envelopes can demonstrate to the patient and the spouse how close they need to be to each other in order for speech to be easily audible. When multiple envelopes have been measured, the selected envelope measurements are brighter and more visible than measurements of the other envelopes. To view a different Visible Speech envelope, use [F2] to select it, or use [F3] to temporarily turn off the display of the other envelopes. If the screen looks too busy, you can turn off the minimum and maximum
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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
Page 158 and 159: 150 FONIX 8000 Hearing Aid Analyzer
Page 207 and 208: Appendix A 199 Specifications ACOUS
Page 209: Specifications 201 Size: 11.5"W x 1
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Page 219: Calibration 211 6. Thread the probe
Page 231 and 232: Appendix G 223 Glossary of Terms AG
Page 233 and 234: Glossary of Terms for the FONIX 800
Page 235 and 236: Glossary of Terms for the FONIX 800
Page 237: Appendix H 229 The FONIX Keyboard A
Page 242: 234 FONIX 8000 Hearing Aid Test Sys
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FONIX® 8000 - Frye Electronics

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