audioscan verifit - Page 3

Verifit
®
User's Guide Version 4.8 © November 2016
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.................................................................................................................................................67
How to Verify with Calibrated 'S' and 'SH' Stimuli..........................................................................................................67
9 Speechmap Technical Details..............................................................................................................................................69
Wideband measurements in Speechmap............................................................................................................................69
Speechmap stimuli.............................................................................................................................................................69
Stimulus spectra..................................................................................................................................................................70
Microphone location effects...............................................................................................................................................72
Deep insertion compensation.............................................................................................................................................72
Speech signal analysis........................................................................................................................................................73
10 On-Ear Instrument Measures.............................................................................................................................................74
On-ear directional test overview........................................................................................................................................74
On-ear directional testing...................................................................................................................................................74
On-ear feedback test...........................................................................................................................................................75
On-ear noise reduction test.................................................................................................................................................75
On-ear noise reduction stimuli...........................................................................................................................................76
On-ear manual control........................................................................................................................................................76
Sound level meter using on-ear microphones....................................................................................................................77
11 WRECD measurement.......................................................................................................................................................78
Calibration of WRECD Transducer...................................................................................................................................78
Measure WRECD ..............................................................................................................................................................79
WRECD results..................................................................................................................................................................80
WRECD protocols..............................................................................................................................................................81
WRECD facts.....................................................................................................................................................................82
12 Occlusion Effect Test.........................................................................................................................................................83
Occlusion effect measurement...........................................................................................................................................83
13 Sensory loss simulator.......................................................................................................................................................84
Sensory loss simulator description.....................................................................................................................................84
Sensory loss simulator operation.......................................................................................................................................84
14 Insertion Gain.....................................................................................................................................................................86
Insertion gain in SPL..........................................................................................................................................................86
Insertion gain in HL...........................................................................................................................................................87
Audiometric data entry.......................................................................................................................................................88
REUR measurement procedure..........................................................................................................................................89
REAR measurement procedure..........................................................................................................................................90
SII calculation in Insertion gain.........................................................................................................................................90
CROS fitting using Insertion gain......................................................................................................................................91
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