Unitron TrueFit software instruction guide v2.2
21
Processing Strategy
1. Click the Processing Strategy task at the bottom of the screen.
2. With DSLv5 adult or DSLv5 pediatric, select your desired processing strategy from the
drop-down menu: WDRC or Linear.
Note: Selecting NAL-NL2 or NAL-NL1 provides a WDRC processing option only.
Tinnitus Masker Strategy
1. Click the Tinnitus Masker Strategy task at the bottom of the screen.
2. Select your desired tinnitus masker signal strategy from the drop-down menu:
Audiogram-based, White Noise, or Pink Noise
Note: The Tinnitus Masker Strategy task box will only be visible with products supporting
this feature.
Note: The tinnitus masker strategy impacts the quick fit calculation for the frequency
shape of the tinnitus masker noise. The tinnitus masker noise can be viewed and fine
tuned in the Fitting > Configure Features > Tinnitus Masker task box.
In Situ
Use the In Situ screen to assess hearing sensitivity and uncomfortable loudness levels via
signals generated by the hearing instruments. The In Situ measurement results can be
used to define the fitting formula targets.
1. Click on the Start In Situ button for the device / ear you would like to assess.
2. An In Situ wizard will appear. Preparation information is provided to assist with the test.
3. Select the coupling option to be used for the In Situ test. The options available will
depend on the form factor being fitted and can include:
a. Vented (current vent value).
Note: Ensure the product venting is configured correctly in the acoustics screen as it
will impact the signal level generated by the device.
b. Temporarily occluded earpiece.
4. After the coupling option is selected, click Continue to get to the In Situ measurement step.
5. Select the desired measurement type (AC: air conduction or UCL: uncomfortable
loudness level) via the appropriate button.
6. Select the desired frequency /presentation level by clicking on the graph.
7. Present the tone by using the space bar or by clicking the Present Tone button.
8. To present tones automatically when you click on the graph, select the Enable
Autoplay option.
9. If you desire to present tones at a loudness level beyond the safety limit of 100 dB HL,
select the Enable HL > 100 dB HL option.
10. To speak with the client during the test, the hearing instrument microphones must be
enabled by clicking on the Talk to Client button. The volume level of the device can be
adjusted as required using the up/down volume arrow keys.
If you would like to use the In Situ data as the basis for the hearing instrument quick fit,
check the Use In Situ data to recalculate hearing instrument settings check box.
Following completion of the test, the In Situ data will be displayed on the graph, along
with any previous standard audiometric data if it is available.
Note: If a previously entered audiogram is available in the session, it will be shown faded
into the background for reference purposes on the In Situ and Audiogram screens.
Click on Use Audiogram to use the entered standard audiometric data for fitting formula
targets.
Click on Use In Situ to use the measured In Situ data for fitting formula targets.
Note: The In Situ data can be deleted using the Remove (Delete) icon above the graph.
If desired, speech sounds and common sound icons can be displayed on the audiogram
for counseling purposes by selecting the check box for the desired information.
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