D-0112389-I – 2022/04
Sera™ - Instructions for Use - EN
Page
71
(Calibrated to
Standards)
IP30 EarCup
OWA Probe
SnapPROBE
TM
Level:
30, 35, 40, 45 dB nHL
Bandwidth:
22.05 kHz
Recording
Analysis time:
3 minutes
A/D resolution:
24 bit
Artifact reject system:
Rejection level (Peak, Min RMS, Max RMS) & Clipping
(Saturation)
Display
Transducer, test result bars, result symbols
(pass/refer/incomplete), test time, artifact, electrode
impedances.
Accuracy of
Measurement
Algorithmic Sensitivity
(default protocol):
99.96 %
Please refer to the Sera
TM
Additional Information
for further information about available test
protocols, test protocol settings and sensitivity and
specificity.
DPOAE
Stimulus
Frequency range:
1500 to 6000 Hz
Nominal frequency:
f2
f2/f1 ratio:
1.22
Level:
50 – 65 dB SPL
Transducer:
SnapPROBE
TM
auto detection, auto calibrated
Replaceable probe tip
OWA Probe auto detection, auto calibrated
Replaceable probe tip
Recording
Analysis time:
60 seconds
A/D Resolution:
24 bit, 5.38 Hz resolution
Artifact (noise)
rejection system:
30 dB SPL
Residual noise:
An RMS average measurement in the DP-bin frequency
area (26 bins at frequencies < 2500 Hz & 60 bins ≥
2500 Hz).
Test Pressure:
Ambient
Display
Transducer, test result bars, result symbols
(pass/refer/incomplete), probe stability, test time,
artifact.
Accuracy of
Measurement:
Algorithmic Sensitivity
(default protocol):
≥ 99.6 %
Please refer to the Sera
TM
Additional Information
for further information about available test
protocols, test protocol settings and sensitivity and
specificity.
The Sera
TM
with DPOAE uses an improved method of stimuli level control, which more accurately delivers
the specified intensity in the full range of ear canals, from infants to adults. The applicability of the IEC
60645-6 standard is currently limited to adult ears. Therefore, to better serve a market with a product that
provides more accurate stimulus levels to a wide range of ear canal volumes (specifically infants), we have
elected to utilize a more comprehensive calibration procedure for DPOAEs that is outside the scope of
IEC 60645-6 for some protocols.
All protocols that include IEC in the name use the specified IEC calibration method.
