Audioscan Verifit - Manual (Page 107)

Verifit ® User's Guide Version 3.12  May 2015
7. Select Test 2 and select the same stimulus and stimulus level used in Test 1.
8. Press to measure and store the long-term signal-averaged result.
9. The isolated band should now appear at a lower frequency and should reach or exceed threshold at its new
location as shown below. Note that the 'cavity' between 1 kHz and the isolated band may be partially or
completely filled in by noise within the hearing aid which will make the isolated band appear less distinct in
the test curves.
10. Once the frequency-lowering properties of the hearing instrument have been verified, use one of the Speech-
std stimuli to verify aided speech audibility or target match (as described elsewhere in this section) for
frequencies below the isolated band.
FM fitting and verification
FM Offset or FM Transparency method in Speechmap (after Platz 2004)
It is assumed that the hearing aid has been set up for optimal audibility and maximum output. See other sections
of Speechmap Fitting Procedures.
1. Before attaching the FM receiver, couple the hearing aid to the 2cc coupler in the test box and select
Speechmap from the Test box measures menu. Select the appropriate hearing Instrument type (typically
BTE).
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