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measures,
the
“real
ear”
factors
are
incorporated
into
the
results.
The
resulting
simulated
measurements
provide
information
to
select
and
make
adjustments
to
the
hearing
instrument
and
verify
adjustments
in
the
MedRx
coupler
rather
than
in
the
uncooperative
client’s
ear.
This
is
particularly
important
in
the
case
of
children,
whose
small
volume
ear
canals
enhance
high
frequency
amplification
more
so
than
in
average
adults.
This
is
an
essential
consideration
in
determining
the
maximum
output
of
the
hearing
instrument.
If
RECD
data
is
present,
the
software
will
display
an
option
to
choose
between
Ear
or
Coupler
measurement
on
all
Real
Ear
screens
where
measurements
in
a
coupler
are
appropriate.
There
are
two
ways
to
measure
the
REAR
response
with
optional
RECD
coupler:
using
an
insert
headphone
or
a
hearing
instrument.
If
a
hearing
instrument
is
used,
its
volume
control
setting
and
other
parameters
should
remain
the
same
for
both
REAR
and
coupler
measurements.
Set
the
volume
control
to
moderate,
and
turn
the
compression
and
noise
reduction
circuits
off.
Using
open
‐
fit
hearing
aids
for
RECD
measurements
may
result
in
invalid
low
and
mid
‐
frequency
measurements
because
of
insufficient
gain
at
those
frequencies.
Please
contact
your
hearing
aid
manufacturer
for
recommendations.
How
to
Perform
the
RECD
Task
First,
perform
the
REAR
task
to
obtain
a
REAR
curve.
This
can
be
measured
with
a
hearing
instrument
or
an
insert
earphone.
REAR
with
a
hearing
instrument
Adjust
volume
of
the
hearing
instrument
to
comfortable
listening
level.
Turn
the
compression
and
noise
reduction
circuits
off.
Position
the
client
less
than
one
meter
from
the
speaker
and
facing
the
speaker.
Place
the
hearing
instrument
and
the
probe
microphone
tube
as
for
all
REM
measurements.
Select
START
to
open
the
measurement
type
selection
screen.
Choose
the
REAR
with
a
Hearing
Aid
option.
Select
OK
to
begin
the
test
and
wait
until
it
concludes.
REAR
with
an
insert
headphone
Place
the
probe
microphone
tube
as
for
all
REM
measurements
but
use
the
insert
headphone
instead
of
a
hearing
instrument.
Select
START
to
open
the
measurement
type
selection
screen.
Choose
the
REAR
with
an
Insert
Headphone
option.
Select
OK
to
begin
the
test
and
wait
until
it
concludes.
Содержание Avant REM+
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