| Standard |
– EC 60601-2-26 (Electroence-phalographs).
– IEC 60645-1/ANSI S3.6 (Audiometers).
– IEC 60645-3 (Auditory test signals). |
|
| PreAmplifier |
Two channels (standard) EPA4 Cable Collector (4 electrodes). Standard 50 cm.
Option: 5 cm or 290 cm
One Channel (optional) EPA3 Cable Collector (3 electrodes). 50 cm
Gain: 80 dB/60 dB. Frequency response: 0,5 – 5000 Hz
Noise: 4nV/√Hz. 0.22 μV RMS (0 – 3 kHz)
CMR Ratio: Minimum > 118 dB. Typical 130 dB <100 Hz
Radio Frequency Immunity: Typically 25 dB improvement over previous available designs
Max input offset voltage: 2,5 V. Input impedance: 10 MΩ. Power: From main unit. |
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| Included Parts ASSR |
ASSR Software CD
Preamplifier
ETB Standard electrode cable with buttons
ETU Universal electrode cable
ETS Electrode cable spring
ETR Electrode cable with re-usable electrodes
PEG15 Set of 25 single use pre-gelled electrodes
EarTone ABR Insert ear phones w/foam tips
20 pcs. of Infant eartip (2 x 10)
SPG15 Tube of skin preparation gel
Ten20™ Electrode gel
Alcohol pads (100 pcs.)
Gauze Swabs |
|
| Modulation Rates |
90Hz and 40Hz. Can be changed within the same session. |
|
| Anti Aliasing Filter |
Analogue 5kHz 24dB / octave. (30kHz Sampling rate). |
|
| Impedance Check |
33Hz rectangle. Impedance information for each individual electrode.
No unplugging of electrode leads required.
Readout directly on Amplifi er. Measuring Current: 19μA. Ranges: 0.5kΩ-25kΩ. |
|
| Transducers |
Ear-Tone ABR insert phones included.
Independent calibration for TDH39 (not included). |
|
| Gain |
Manual: 6dB steps from 74dB to 110dB (5μV to 320μV input). |
|
| Number of Channels |
2 channel response detection. (EPA3: 1 channel). 8 channels for stimulus control. |
|
| Auto Protocols |
Test protocols included for children and for adults (sleeping and awake).
Customized protocols can be created by user. |
|
| Stimuli |
NB CE-Chirps® at 500Hz, 1kHz, 2kHz, 4kHz. Bandwidth: +/- ½ octave -3dB. Very steep roll offs. Simultaneous stimuli: 8 (4 frequencies in each Ear). |
|
| Rejection system |
Manual increase and decrease of rejection limits during data acquisition. |
|
| Raw EEG |
Online display of both channels. Refresh rate: 10Hz typical. |
|
| Optional Parts |
TDH39 Headset
EPA3 Cable collector (one channel/3 electrodes) |
|
| Masking |
White noise. 0 – 100dB HL. |
|
| Stimulus Control |
Independent control of up to 8 simultaneous stimuli (max. 4 per ear).
Independent stimulus level control for each of the 8 stimuli, with dynamic range assistance.
Independent start / stop control for each of the 8 stimuli. |
|
| Data Acquisition |
2 channels. Separate Detection Algorithm for each Channel.
A/D resolution: 16bit. Manual Start and Stop: Global as well as for each stimulus.
Time out limits: Max 15min. (Default: 6 min.). Manual change in +/- 1 min. steps.
False Pass Probability Settings: 1% and 5%. |
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Features
