Audioscan Verifit User Manual download pdf (Page 116)

Verifit

User's Guide Version 3.12



May 2015

Accessing Viewport tests

1. Press <Tests>, then highlight and <PICK> [Viewport].

2. Highlight and <PICK> [Test box] to prefit a hearing instrument and pre-verify the functions of key digital

features prior to fitting; highlight and <PICK> [On-ear] to perform on-ear fitting, demonstrate digital

functions and counsel patients.

NOTE: Within a given Verifit session, if you have already performed separate Speechmap, Directional, Noise

reduction or Feedback tests using the Test box or On-ear measures menu, these results will automatically

populate the appropriate Viewport quadrants. However only results of Speechmap Tests 1 - 3 are visible in the

Audibility quadrant of Viewport and only results of Tests 1 and 2 from Directional, Noise reduction and/or

Feedback tests are visible in their respective Viewport quadrants.

Viewport Audibility test

1. On the Viewport screen, highlight and <PICK> [Audibility]. You can either work with the existing session

data that appears, scan a previously acquired threshold barcode or enter new threshold data.

2. To enter new thresholds, highlight and <PICK> [Audiometry]. Enter HL thresholds using a mouse or the

keypad. Left click the mouse on the audiogram to enter a point. Click again to delete the point. On the

keypad the arrow keys change frequency and level and <PICK> enters or deletes a threshold point. Press

<Continue> when all points have been entered.

3. For Test box measures, position the hearing aid in the test box. See Positioning the Hearing Instrument in

Test Box Measures.

4. For On-ear measures, position the client, probe module and probe tube and insert the earmold or hearing aid

into the test ear. See Positioning the Client, Positioning the Probe Tube in On-Ear Measures.

5. Highlight and <PICK> Test 1 to present speech at 50 dB SPL (default). The middle of the three active curves

now visible (LTASS) should hover above the (red or blue) threshold curve for as broad a range of

frequencies as is possible, or it should hover at the target levels if targets are displayed. If it does not, adjust

gain (without changing compression) until it does. Press <Continue> and wait for the test to complete.

Repeat as needed to get the middle curve just above threshold or around the displayed fitting target.

6. Highlight and <PICK> Test 2 to present speech at 65 dB SPL (default). The lower curve should now hover at

or just above the threshold curve. If targets are displayed, then the middle curve (LTASS) should hover at the

target levels If either of these results are not evident, adjust high-level gain (or compression ratio) until the

desired result is obtained. Press <Continue> and wait for the test to complete. Repeat as needed.

NOTE: Running a new test hides the envelope for previous speech test(s). To re-display the hidden envelope,

highlight and <PICK> Hide/Show and select the corresponding envelope (right column) button.

7. Highlight and <PICK> Test 3 to present tones at 90 (Test box) or 85 (On-ear) dB SPL. In the On-ear mode,

no tones are presented until you press <Continue>. The measured curve should be near but below the *

markers at all frequencies. If it is not, adjust the MPO control(s) of the hearing instrument until the

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Audioscan Verifit User Manual Page 116