Auditory Brainstem Response
The ActiveTwo system is able to measure a very large number of channels with the normal EEG bandwidth, for example 256 channels@2kHz samplerate. At the same time, the ActiveTwo can also be used for experiments requiring a lesser amount of channels at a much higher samplerate. The System is easily switched between these options with the speedmode switch on the front panel of the AD-box. The digital anti-aliasing filters and ActiView acquisition software automatically adjust to the selected samplerate. This option of adjusting the samplerate makes the system very versatile. Below is an example of the ActiveTwo used in an application with only a few channels on 16 kHz.

This picture shows the result of a measurement with the special ABR electrode.

For explanation and application info, refer to this YouTube video: Neurospec Introduction to ABR


Download the ABR leaflet


This picture shows the neural pathway for ABR response purposed by Hall, J. W., III. (1992). Handbook of auditory evoked responses. Boston: Allyn & Bacon. Hood, L. J., (1998) Clinical applications of the auditory brainstem response, San Diego, CA: Singular Publishing Group.



This picture shows a speech evoked ABR recorded with a BioSemi ActiveTwo system at Montclair University. It's super clean!

Download the pdf file for more information