MedRx AVANT REM (Real Ear Measurement) Installation Manual
Effective Date: 05-25-2017
8
Preparing for Testing
Speaker Calibration
Open the Speaker Calibration screen from REM/LSM screen menu,
Tools > Calibrate
Speakers.
The speaker should be positioned in such a way that nothing blocks the path of the
emanated sound in front and on the sides of the speaker. For example positioning a speaker
behind a monitor is incorrect and can severely affect its response at the measurement
location. The speaker diaphragm should be at about the same level as the patient's ear and
the reference microphone.
Place the reference microphone at the location where the patient normally sits, or about 1
meter from the speakers.
Click on
Start
to begin the calibration and wait until it ends. Observe the response curve to
flatten itself out. The darker curve is showing the response used by the equalization
algorithm, the lighter curve is showing the current microphone input. Use of the powered
speaker supplied with this device is
recommended.
Calibrating the Probe Tube
For reasons of infection control and reliability of results, MedRx recommends that a new probe
tube be used with each patient.
To ensure accurate measurements, it is necessary to calibrate
the probe tube each time it is replaced.
1.
Place a new probe tube on the
probe microphone port as
shown.
2.
Place the probe tube between
the calibration nibs as shown.
Be sure that the opening of the
probe tube is centered on the
opening of the reference
microphone.
