oticon Sumo XP, Fittings Manual

8

Although the prescribing algorithm takes the risk of feedback occurring into account when calculating
the prescribed setting, there is still some risk of feedback occuring when the fitting session begins or at
higher volume control levels. This is because these settings are not based on the actual earmould being
used.

The following steps give you suggestions on how to manage feedback:

1. Check for feedback in the prescribed setting. 

Ask the client to smile and move their jaw.

• If feedback occurs, run the FBM tool. (For more information see next page)
• If no feedback occurs continue to the next step.

2. Check for feedback at higher volume control settings by increasing the feedback trimmer in Genie. 

Ask the client to smile and move their jaw.

• If feedback occurs, run the FBM tool.
• If no feedback occurs, you still may wish to run the FBM tool to provide more high 

frequency gain at higher volume control levels.

When adjusting for feedback, it is very important that the client is active during the test. The client 
should move their jaw and head and smile to maximize the risk of feedback in any situation.

When the FBM tool has been activated, a Measured Feedback Area is set. If you wish to return 
to Default Feedback Area, press “Reset to Default Feedback Area” in the FBM dialogue box.

If a new earmould has been fitted you might wish to run the FBM tool again to define the Feedback 
Area for the new earmould. 

If you manually eliminate feedback using the Feedback Manager trimmer, never set the trimmer to 
below 3.0. If this is necessary in order to eliminate feedback, use the FBM tool instead as this will 
provide a more optimal setting.

Step 2b: Check For Feedback

Feedback Mgr.

FBM tool 

Feedback Manager

This tool eliminates 
feedback during the 
fitting session.
(See next page)