e Ensure that the earplug is positioned so that the wire rests in the notch at
the bottom of the ear canal. Hold the plug for a few seconds until the foam expands inside the
ear and will hold the plug in place.
f Repeat Steps c through e for the other earplug.
g Check the fit of each earplug by moving a cupped hand near the ear. The
user should not perceive any change in sound level. If the sound level changes, this indicates
an improper seal; repeat steps c through e with new foam tips. If the foam tips still don not seal
properly, repeat steps c through g with the next larger foam tip size. If the foam tips still do not
seal properly, consult the local hearing conservation officer.
If you are not wearing a CB protective mask, do not perform Steps h and i. The
CEP extension cable (CEP199-X01) should be used only with a CB protective
h If the M45 mask is to be worn, connect the CEP to the extension cable as
Figure 12. CEP and Extension Cable.