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Problem
Possible cause
Solution
The hearing
aids do not
respond with a
correspond ing
change in vol-
ume or pro-
gram to the
DEX
The DEX is used
beyond the trans-
mission range
Move the DEX closer to
the hearing aids
Strong electromag-
netic interference in
the vicinity
Move away from known
source of EM interfer-
ence
The DEX and the
hearing aids are not
matched
Check with hearing care
professional to make
sure DEX is matched
with the hearing aids
You hear
“inter rupted”
speech (on
and off) from
the hear ing
aids or no
speech
(muted) from
the transmit-
ting ear .
The battery in one of
the hearing aids has
expired
Replace battery in one
or both hearing aids
Strong electromag-
netic interference in
the vicinity
Move away from known
sources of interference
