Audioscan Verifit - Manual (Page 96)

Verifit ® User's Guide Version 3.12  May 2015
Screen tour - aided screen
On-ear or Test box mode
The Speechmap environment provides two hearing instrument verification options: On-ear measures and Test
box measures. Using on-ear mode, the stimulus is controlled by the on-ear reference microphone below the ear
and SPL in the ear canal is measured by the probe microphone. In test box mode, levels measured in the 2cc
coupler are converted to estimated ear canal levels using the RECD values (age-appropriate average, entered, or
measured). In addition, the stimulus delivered to the hearing instrument microphone is modified to include
average microphone location effects for the hearing instrument type indicated. The screen display for both
modes is the same, showing SPL, measured or simulated, in the ear canal.
For On-ear mode: press <Tests>, then highlight and <PICK> On-ear measures and highlight and <PICK>
Speechmap. Review On-Ear Measures - Setup,
For Test box mode: press <Tests>, then highlight and <PICK> Test box measures and highlight and <PICK>
Speechmap. Review Calibrating test box reference microphone, Coupling the hearing instrument, Positioning
the hearing instrument.
To switch modes: highlight and <PICK> [Mode].
It is suggested that hearing instruments be preset in test box mode with fine tuning done in on-ear mode.
Note that on-ear mode should be used for vented or open fittings. Vent effects depend on the vent, the ear and
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