Audioscan Verifit - Manual (Page 4)

Verifit ® User's Guide Version 3.12  May 2015
On-ear feedback test ........................................................................................................................................................... 74
On-ear noise reduction test ................................................................................................................................................. 74
On-ear manual control ........................................................................................................................................................ 75
Sound level meter using on-ear microphones .................................................................................................................... 76
15 Occlusion Effect Test ......................................................................................................................................................... 78
Occlusion effect measurement ........................................................................................................................................... 78
16 RECD measurement ........................................................................................................................................................... 79
Calibration of RECD transducer ........................................................................................................................................ 79
Measure RECD .................................................................................................................................................................. 80
RECD results ...................................................................................................................................................................... 81
ANSI S3.46(2013) RECD ................................................................................................................................................. 82
RECD protocols .................................................................................................................................................................. 82
RECD facts ......................................................................................................................................................................... 84
17 Insertion Gain ..................................................................................................................................................................... 85
Insertion gain in SPL .......................................................................................................................................................... 85
Insertion gain in HL ........................................................................................................................................................... 86
Audiometric data entry ....................................................................................................................................................... 86
REUR measurement procedure .......................................................................................................................................... 87
REAR measurement procedure .......................................................................................................................................... 88
SII calculation in Insertion gain ......................................................................................................................................... 89
CROS fitting using Insertion gain ...................................................................................................................................... 89
18 Speechmap ......................................................................................................................................................................... 91
Speechmap facts ................................................................................................................................................................. 91
DSL 5.0 in Speechmap ....................................................................................................................................................... 91
DSL 5.0 changes ................................................................................................................................................................. 92
NAL-NL1 in Speechmap .................................................................................................................................................... 92
NAL-NL2 in Speechmap .................................................................................................................................................... 92
Camfit in Speechmap ......................................................................................................................................................... 93
Using Speechmap ............................................................................................................................................................... 93
Speechmap Setup ................................................................................................................................................................ 94
Screen tour - unaided screen .............................................................................................................................................. 95
Screen tour - aided screen .................................................................................................................................................. 96
On-ear or Test box mode .................................................................................................................................................... 96
SII calculation in Speechmap ............................................................................................................................................. 97
Using custom stimuli in Speechmap .................................................................................................................................. 97
Creating WAV files for Speechmap .................................................................................................................................. 99
19 Speechmap Fitting Procedures ........................................................................................................................................ 101
Assessment data entry ...................................................................................................................................................... 101
Assessment data choices .................................................................................................................................................. 102
Fitting to targets for soft speech ....................................................................................................................................... 103
Fitting to targets for loud sounds ..................................................................................................................................... 104
Fitting to targets for mid-level speech ............................................................................................................................. 104
Open fittings in Speechmap ............................................................................................................................................. 105
Verifying Frequency Compression/ Frequency-Lowering Hearing Instruments in Speechmap .................................... 105
FM fitting and verification ............................................................................................................................................... 107
CROS fitting in Speechmap ............................................................................................................................................. 108
T-Loop fitting and verification in Speechmap ................................................................................................................ 109
20 Speechmap Technical Details .......................................................................................................................................... 112
Speechmap stimuli ........................................................................................................................................................... 112
Stimulus levels .................................................................................................................................................................. 112
Microphone location effects ............................................................................................................................................. 113
Deep insertion compensation ........................................................................................................................................... 114
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