Maico easyScreen - Page 76

Operation Manual easyScreen
8508935 Rev. 4
76
04/04/2019
ABR
Stimulus
Type
CE-CHIRP
®
(default) range 200 Hz to 11 kHz
Click range 200 Hz to 11 kHz
Level range
30 dB nHL to 45 dB nHL
Default level
35 dB nHL
4
Stimulus rate
88 /s left ear, 92.5 /s right ear
Transducers
IP30 ABR insert phones
IP30 ABR for EarCup
TM
OAE Probe
BERAphone
®
Test modes
Binaural (only with IP30) or monaural
Recording
Analysis time
Maximum 180 s of artifact-free data samples
A/D resolution
24 bit
Artifact reject system
Rejection level (Peak, Min RMS, Max RMS)
& Clipping (Saturation)
Artifact rejection level
100 μV
Display
View of progress bars toward Pass, feedback
about EEG Noise and recording Time
ABR impedance
measurement
Measurement frequency
33 Hz
Measurement current
11.25 μA
Waveform
Rectangular
Acceptable Impedance
Range
1 kΩ to 50 kΩ
DPOAE
Stimulus
Frequency range
1500 Hz to 6000 Hz
Default frequencies
2000, 3000, 4000, 5000 Hz
Nominal frequency
F2
F2/F1 Ratio
1.22
Level range
50 dB SPL to 65 dB SPL
Default level (L1/L2)
65 dB SPL / 55 dB SPL with in-ear
calibration
5
Level tolerance
7 dB
Transducer
OAE Probe
4
See section 6.7 for more information about the available protocols with different levels and stimuli.
5
The easyScreen uses an alternative stimulus level control procedure, which is optimized for a large
range of ear canal volumes from newborn ears with small ear canal volumes to adult ears with large
volume. This is beyond the range required by the standard. See section 6.7 for details about the
protocols which comply with the standard.