User guide
ELI
O
S
ECH001XN111-A4 – 07/2022
72
Handheld mode measurement
4.7 DP-gram
•
"Low signal. Check leak. Continue?"
: The signals F1 and F2 and are too low compared to their set value (at
least 20dB too low). This may be due to the wrong positioning of the probe, more precisely a sealing problem
between the probe plug and the ear canal. It is advised to click on “No”, reposition the probe and restart the meas-
ure. However, if you are sure of the probe’s positioning, it is possible to continue by clicking on “Yes”.
•
"Too much signal, Check eartip. Continue?"
: The signals F1 and F2 and are too strong compared to their set
value (at
least
20dB too much). This may be due to an incorrect positioning of the probe, more precisely a probe
plug pushed too far into the ear canal. It is advised to click on “No”, reposition the probe and restart the measure.
However, if you are sure of the probe positioning, it is possible to continue by clicking on “Yes”.
Once the calibration is complete, the measurement window is displayed:
A progression bar informs you of the state of progress of a point. When the progression bar stops, the system updates
the point corresponding to the frequency being tested. This graph contains several kind of information :
1.
The green curve represents the power of the distortion product in dB at the various selected frequencies.
2.
The index given in white above a point is the power of the distortion product.
3.
The vertical white figures indicate the test frequency for each points.
4.
The red curve represents the average noise level.
The rejection indicator light notifies you when the rejection threshold is reached. If 40 successive rejections are de-
tected, the current point is rejected and the "
Rejection
" information appears on the screen. This phenomenon indicates
that the acoustic noise is too high. There can be several causes for this:
1.
The patient noise is too high. When the patient is more relaxed, measurement will start again automatically.
If the phenomenon persists, it means that the rejection threshold has been calibrated too low. Exit from the
measurement by clicking on "
Stop
" then restart a new measurement.
2.
The probe is incorrectly positioned. It is possible that the probe moves during measurement, in particular if
you are running postural tests. In this case, click on "
Stop
", replace the probe (paragraph
5.2.2
) and make
another measurement.
3.
The ambient noise is too high. The intrinsic noise in the room where you are making the measurement must
not exceed 60 dB.
The "
Stop
" button stops the measurement. Once the data acquisition is over, the curve is reconstructed. You then
have the choice of saving the data by clicking on "
Save
" or deleting it by exiting the window using the back cross.
Nest measurement
Rejection level setting
Rejection indicator
Frequency in Hz
Progress bar
Noise level
Signal level in dB SPL
Current measurement
For more details about the curve consulting options, please refer to paragraph
Erreur ! Source du renvoi
introuvable.
.
The saved data can be consulted in the patient's "
Consultation
" menu.
