Unitron Element Uživatelský manuál stáhnout pdf (Strana 7)

Feedback

Optimization

Screen

At the initial fitting, the first step is to run the

Feedback Optimization test to activate the

phase canceller. This test will take

approximately 15 seconds per ear.

To run the Feedback Optimization test:

1. Ensure that ambient noise is at a

minimum. If the ambient noise level is too

high during the test, U:fit will prompt you

to reduce ambient noise levels.

2. Click either the Right Ear or Left Ear

button to start the test. Test progression

can be seen on the status bar at the

bottom of the screen. To stop the test,

click Stop.

If the test ran successfully, the hearing aid’s

gain limits are updated on the graph (black line) and the phase canceller is enabled.

High ambient noise levels may affect the Feedback Optimization results. If this is the case,

you will be notified at the end of the test. You may choose to accept the results or reduce

ambient noise levels and conduct the test again.

Curve description:

Note: The phase canceller is not enabled until the feedback optimization test has been run.

For slim tube fittings the speech enhancement is not enabled until the feedback

optimization test has been run.

Black line Feedback threshold (max gain achieved without feedback)

Green line Target gain

Red or Blue line Aided gain

Grey line Hearing instrument limit

Element Programming Guide

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Unitron Element Uživatelský manuál Strana 7