Etymotic The BEAN® Quiet Sound Amplifier® - Manual (Page 8)

8
Selecting an Eartip
ACCU•Fit ™ Eartips
Selecting an eartip:
No two ears are exactly alike. The eartip that is most
comfortable is the best choice, but it must seal well
to prevent feedback (whistling).
When changing eartips make sure the eartip
fits securely on the stem of the BEAN.
incorrect correct