Otodynamics Otoport Flex - ABR Test Stimulus and Polarity

CHAPTER TWENTY-SIX
Mode of operation
196
Mode of operation
26.3 ABR test
Stimulus level 5-60 dBHL
Stimulus rate 51.8-57.9Hz
Stimulus polarity Alternating
Stimulus type Click or Chirp (see below)
Stimulus repetition rate 51.8-57.9 Hz
Evaluation method Fsp & Template Correlation
Sampling rate 25.6 kHz
Frame length 17.3-18.8ms
Amplier gain 75dB
Amplier CMRR > 60dB at 100 Hz
Input impedance 1MΩ || 10 nF
Amplier noise 20 nV / Hz @ 0.1-1 kHz
Input bandwidth 150-1000 kHz
Notch lter None
Impedance sense current 0.2µA
Impedance sense signal 400 Hz square wave
Impedance test range 0 to 99 kΩ
Display EEG-level, ABR detection probability
Electrodes Disposable wet gel electrodes
(FDA 510(k) cleared)
Electrode Montage
Positive electrode Forehead
Negative electrode Ipsilateral mastoid or nape of neck
Common electrode Back of shoulder, cheek, or contralateral
mastoid