MedRx Avant REM+, Руководство пользователя

Страница: 26 / 40

D ‐ 0125127 ‐ C
26
Coupler Response
When the REAR measurement is complete, you are prompted to perform
a coupler response.

Attach the hearing instrument or the
insert headphone (must be the same as
in the REAR test) to the appropriate
coupler and place the probe tube inside
the coupler.

If a hearing instrument is used, be sure
to perform this measurement at the
same volume control setting as the first
measurement.

Select START to open the measurement
type selection screen.

Choose the Coupler Response option or
Use Stored to skip the measurement
(see note below.)

Select OK and wait until the test completes.

The calculated RECD curve is automatically displayed on the
screen and is stored in memory for correction of subsequent
coupler measurements made from the RECD function.
NOTE: If the REAR and the coupler response were measured with the
insert headphone, the program saves the coupler response curve for
later use. In this case to obtain another RECD, only REAR with insert
headphone measurement is necessary. This is possible because the
coupler response does not change provided that neither the coupler
nor the insert earphone has changed.
NOTE: After measuring RECD, it is possible to perform Live Speech
Mapping in the coupler as well. Look for the “Measuring in” option on
the LSM screen.
Measuring Acoustic
Feedback
Feedback (whistling, howling) is one of the most common complaints
of hearing instrument users. Even though many modern hearing
instruments have sophisticated feedback management systems,
knowing exactly where the feedback is occurring can greatly reduce the
time required to resolve the problem. The AVANT REM+ system does
an excellent job measuring and displaying acoustic feedback.
1. Place the calibrated probe tube
in the ear canal as instructed
previously.
2. Place the hearing instrument in
the ear without disturbing the
probe tube.
3. Begin a Live Speech Mapping
session as instructed previously.
4. When feedback is present, click
the Start button.
5. Acoustic feedback appears as a
large spike in the LSM response.