29
28
preparing for use
Connecting the Tube and Dome/Tip
1 Choose either the left or right sound tube (pictured on
page 26).
2 Align the sound tube connector end with the sound post
on the hearing aid. Twist the tube clockwise onto the
sound post until it’s snug.
Be sure it is securely fastened to the sound tube before
inserting it in your ear.
3 Choose a dome/tip to use with the sound tube (pictured
on page 27).
2
4
Adult canal
length
varies
0.9-1.1”
(
23-28mm)
Insertion depth =
0.37” (
9.5mm) max
Good
Fit
Too
Small
Adult canal
length
varies
0.9-1.1”
(
23-28mm)
Insertion depth =
0.37” (
9.5mm) max
Dome/Tip Insertion Depth
The dome/tip should be completely in the ear
canal without touching the eardrum. Proper
insertion of the dome/tip is key to getting
adequare loudness with no feedback (“whistling”).
For adults, the length of the ear canal varies from 0.9” to 1.1”.
The maximum insertion depth is 0.37”. While wearing the
hearing aid, the distance from the dome/tip to the eardrum
is at least 0.53”. This is greater than the lower limit of 0.39” as
specified by OTC guidelines, meaning there is more space
between the dome/tip and eardrum.
4 Align the dome/tip with the end of the sound tube and push it straight on.
preparing for use continued
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