
7
Choosing the correct coupling for power xReceivers
Determine the correct dome size based on your otoscopic examination of the ear canal.
Selectthedometypebasedon the audiometric requirements and tting ranges shown on this page.
Allowthedome to t comfortably in the ear canal.
Open dome
Choose for:
•Instant t
•Open t
Considerations:
•Occlusion free
Closed dome
Choose for:
•Instant t
•Semi-occluded t
Considerations:
•Extended tting
range over open
dome
•Some occlusion
Power dome
Choose for:
•Instant t
•Occluded t
Considerations:
•Extended low-
frequency response
•Occlusion
Sleeve mold
cShell
Choose for:
•Custom t
•IntelliVent technology
Considerations:
•Comfort
•Possible occlusion
•Impression required
250 500 1000 2000 4000 8000
-10
0
10
20
30
40
50
60
70
80
90
100
110
120
Hz
Open dome
Closed dome
Power dome
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