Cochlear Nucleus 8 Manual page 11

Fit a dome
Select the dome type based on the recipient's degree of hearing loss. All domes come in
6 mm, 8 mm or 10 mm sizes:
Note
If you prefer, recipients can use a custom earmould instead of a dome for the 60
and 85 Hybrid receiver sizes.
1. The Custom Sound software suggests a dome type based on the recipient's
audiogram.
Note
You can use a different dome than suggested if you prefer. While you should fit as
open a dome as possible, you also need to prevent feedback (too open) or occlusion
(too closed).
2. Select a dome size and fit the dome onto the speaker unit and try it in the recipient's
ear canal.
3. If the dome does not fit the ear, remove it and discard, then try a different size dome.
Hybrid Mode Professionals Guide
Cochlear Hybrid Open Dome
Open Domes have a more open fit in the ear canal, and suit
recipients with mild to moderate hearing loss.
Cochlear Hybrid Bass Double Dome
Bass Double Domes suit recipients with moderate hearing loss.
They have a double vent.
Cochlear Hybrid Bass Single Dome
Bass Single Domes suit recipients with moderate hearing loss. They
have a single vent.
Cochlear Hybrid Power Dome
Power Domes fit more snugly, and provide better headroom before
feedback, suiting recipients with severe hearing loss.
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