Audioscan Verifit 2 - Manual (Page 55)

Verifit ® User's Guide Version 4.2 © June 2015
8 Speechmap Fitting Procedures
The Speechmap fitting screen provides a number of choices for inputting and applying audiometric data for the
verification of hearing instrument fittings. The procedures in this section assume a familiarity with Test Box
Measures - Setup, On-Ear Measures - Setup, On-Ear Measures Screen Setup and Speechmap.
Speechmap screen choices
Speechmap screen choices are made by clicking on the relevant buttons for [On ear or Test box], [Graph or
Table], [Dual view or Single view], [L or R or L+R], [Audiometry], [BTE + HA-4, BTE + mold, ITE, ITC, CIC,
RITE, Body, Open, CROS or FM] and [Loss simulator] Clicking on [Audiometry] will cause a related selection
poster to be presented. Changes made on this poster are applied and the poster closed by clicking on
. The
poster may be closed without applying the changes by clicking .
Defaults are the last-used choices if test setup memory has been turned on. See Saving test setup.
1. Targets: Fitting rule. Select from DSL Adult, DSL Child, NAL-NL1, NAL-NL2, Camfit restoration,
Camfit equalisation or None.
2. HL Transducer: Sound source used to obtain the audiogram. Select from [Headphone, Insert + foam, Insert
+ mold (DSL only) or Soundfield. If Headphone is selected, average adult real-ear to dial difference (REDD)
is used to convert entered HL values to ear canal SPL. If Insert + foam is selected the appropriate real-ear to
coupler difference (RECD) is used to convert entered HL values to ear canal SPL values. If Insert + mold is
selected, the audiometer is no longer calibrated and a measurement protocol is provided for accurate
conversion of entered HL values to ear canal SPL. If Measure is not selected, entered HL values are
converted to ear canal SPL as if a foam tip had been used to obtain the audiogram. If Soundfield is selected
appropriate real-ear unaided gain (REUG) values @ 45 degrees azimuth, will be used to convert HL values
to ear canal SPL values.
3. Bone conduction: Select from [N/A or Enter]. If [Enter] is selected, an entry screen will be provided after
the air conduction thresholds have been entered.
4. UCL: Uncomfortable Level. Select from [Enter or Average]. If Average is selected, UCL will be estimated
from entered thresholds. If [Enter] is selected, an entry screen will be provided after the air (and bone)
conduction thresholds have been entered. If measured UCL values are entered, these values will be converted
to real-ear SPL and used as real-ear saturation response (RESR) targets. Note that DSL 5.0 has changed this
term to Upper Limit of Comfort (ULC). Regardless of the acronym, it is a narrow-band SPL that should
never be exceeded.
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