Verifit
®
User's Guide Version 3.12
November 2015
On-ear feedback test...........................................................................................................................................................76
On-ear noise reduction test.................................................................................................................................................76
On-ear manual control........................................................................................................................................................77
Sound level meter using on-ear microphones....................................................................................................................78
15 Occlusion Effect Test.........................................................................................................................................................80
Occlusion effect measurement...........................................................................................................................................80
16 RECD measurement...........................................................................................................................................................81
Calibration of RECD transducer........................................................................................................................................81
Measure RECD ..................................................................................................................................................................82
RECD results......................................................................................................................................................................83
ANSI S3.46(2013) RECD .................................................................................................................................................84
RECD protocols..................................................................................................................................................................84
RECD facts.........................................................................................................................................................................86
17 Insertion Gain.....................................................................................................................................................................87
Insertion gain in SPL..........................................................................................................................................................87
Insertion gain in HL...........................................................................................................................................................88
Audiometric data entry.......................................................................................................................................................88
REUR measurement procedure..........................................................................................................................................89
REAR measurement procedure..........................................................................................................................................90
SII calculation in Insertion gain.........................................................................................................................................91
CROS fitting using Insertion gain......................................................................................................................................91
18 Speechmap.........................................................................................................................................................................93
Speechmap facts.................................................................................................................................................................93
DSL 5.0 in Speechmap.......................................................................................................................................................93
DSL 5.0 changes.................................................................................................................................................................94
NAL-NL1 in Speechmap....................................................................................................................................................94
NAL-NL2 in Speechmap....................................................................................................................................................94
Camfit in Speechmap.........................................................................................................................................................95
Using Speechmap...............................................................................................................................................................95
Speechmap Setup................................................................................................................................................................96
Screen tour - unaided screen..............................................................................................................................................97
Screen tour - aided screen..................................................................................................................................................98
On-ear or Test box mode....................................................................................................................................................98
SII calculation in Speechmap.............................................................................................................................................99
Using custom stimuli in Speechmap..................................................................................................................................99
Creating WAV files for Speechmap................................................................................................................................101
19 Speechmap Fitting Procedures........................................................................................................................................103
Assessment data entry......................................................................................................................................................103
Assessment data choices..................................................................................................................................................104
Fitting to targets for soft speech.......................................................................................................................................105
Fitting to targets for loud sounds.....................................................................................................................................106
Fitting to targets for mid-level speech.............................................................................................................................106
Open fittings in Speechmap.............................................................................................................................................107
Verifying Frequency Compression/ Frequency-Lowering Hearing Instruments in Speechmap....................................107
FM fitting and verification...............................................................................................................................................109
CROS fitting in Speechmap.............................................................................................................................................110
T-Loop fitting and verification in Speechmap................................................................................................................111
20 Speechmap Technical Details..........................................................................................................................................114
Speechmap stimuli...........................................................................................................................................................114
Stimulus levels..................................................................................................................................................................114
Microphone location effects.............................................................................................................................................115
Deep insertion compensation...........................................................................................................................................116
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