Audioscan Verifit - Manual (Page 57)

Verifit ® User's Guide Version 3.12  May 2015
7. Press <Continue> to capture curves or press <Cancel> to abort the test. Captured curves are labeled L (left
speaker response) and R (right speaker response) followed by the test number (1 - 4).
To test directional function in situ, see On-Ear Instrument Measures
Multicurve procedure
Multicurve generates 1 to 4 output or gain response curves using either pink noise or swept pure tones at input
levels ranging from 40 – 90 dB SPL and 0 dB (off).
1. Press <Tests>, then highlight and <PICK> [Test box measures], then highlight and <PICK> [Multicurve].
2. Refer to Coupling the hearing instrument, Positioning the hearing instrument and Battery pill use and care to
prepare the instrument for testing.
3. Turn the instrument ON.
4. Highlight and <PICK> button 1, 2, 3 or 4 in the Test column.
5. Highlight and <PICK> the Stimulus window, then highlight and <PICK> either [Pink noise] or [Swept] from
the drop-down list.
6. Highlight and <PICK> the Level window for the selected Test, then highlight and <PICK> a stimulus level
from the drop-down list.
7. Press <Continue> to run a sweep or to capture a pink noise curve; press <Cancel> to abort the test.
8. To measure another response curve, highlight and <PICK> another test button; to overwrite a curve,
highlight and <PICK> its test button.
To change scale from dB SPL to dB Gain, highlight & <PICK> the Scale window.
Multicurve results
1. Output curves for the noise signal are in 1/12th octave bands. They will be approximately 18 dB lower than
pure tone curves for a linear instrument.
2. Gain curves for a linear instrument will be the same for both swept and pink noise test signals.
3. For compression instruments, both gain and output curves may be expected to differ for the two test signals.
4. See Test Box Measures - Setup to change screen appearance.
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