Audioscan Verifit 2 - Manual (Page 3)

Verifit ® User's Guide Version 4.2 © June 2015
On-ear or Test box mode .................................................................................................................................................... 50
SII calculation in Speechmap ............................................................................................................................................. 51
Using custom stimuli in Speechmap .................................................................................................................................. 51
Creating WAV files for Speechmap .................................................................................................................................. 53
8 Speechmap Fitting Procedures ............................................................................................................................................ 55
Speechmap screen choices ................................................................................................................................................. 55
Data entry ........................................................................................................................................................................... 57
Fitting to targets for soft speech ......................................................................................................................................... 57
Fitting to targets for average speech ................................................................................................................................. 58
Adjusting the Maximum Output Level .............................................................................................................................. 59
Open fittings in Speechmap ............................................................................................................................................... 60
Verifying Frequency Compression/ Frequency-Lowering Hearing Instruments in Speechmap ...................................... 61
Binaural fitting in Speechmap ........................................................................................................................................... 62
CROS fitting in Speechmap ............................................................................................................................................... 63
T-Loop fitting and verification in Speechmap .................................................................................................................. 64
Tele-test fitting and verification in Speechmap ................................................................................................................ 65
FM fitting and verification ................................................................................................................................................. 66
How to Verify with Calibrated 'S' and 'SH' Stimuli .......................................................................................................... 66
9 Speechmap Technical Details .............................................................................................................................................. 68
Wideband measurements in Speechmap ............................................................................................................................ 68
Speechmap stimuli ............................................................................................................................................................. 68
Stimulus spectra .................................................................................................................................................................. 69
Microphone location effects ............................................................................................................................................... 70
Deep insertion compensation ............................................................................................................................................. 70
Speech signal analysis ........................................................................................................................................................ 71
10 On-Ear Instrument Measures ............................................................................................................................................. 72
On-ear directional test overview ........................................................................................................................................ 72
On-ear directional testing ................................................................................................................................................... 72
On-ear feedback test ........................................................................................................................................................... 73
On-ear noise reduction test ................................................................................................................................................. 73
On-ear manual control ........................................................................................................................................................ 74
Sound level meter using on-ear microphones .................................................................................................................... 74
11 WRECD measurement ....................................................................................................................................................... 76
Calibration of WRECD Transducer ................................................................................................................................... 76
Measure WRECD .............................................................................................................................................................. 76
WRECD results .................................................................................................................................................................. 78
WRECD protocols .............................................................................................................................................................. 78
WRECD facts ..................................................................................................................................................................... 80
12 Occlusion Effect Test ......................................................................................................................................................... 81
Occlusion effect measurement ........................................................................................................................................... 81
13 Sensory loss simulator ....................................................................................................................................................... 82
Sensory loss simulator description ..................................................................................................................................... 82
Sensory loss simulator operation ....................................................................................................................................... 82
14 Insertion Gain ..................................................................................................................................................................... 84
Insertion gain in SPL .......................................................................................................................................................... 84
Insertion gain in HL ........................................................................................................................................................... 85
Audiometric data entry ....................................................................................................................................................... 86
REUR measurement procedure .......................................................................................................................................... 87
REAR measurement procedure .......................................................................................................................................... 88
SII calculation in Insertion gain ......................................................................................................................................... 88
CROS fitting using Insertion gain ...................................................................................................................................... 89
15 Test Box Measures - Setup ................................................................................................................................................ 91
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