Electrical noise suddenly appeared in our Neuroscan EEG collection
system. We can perform quick calibration tests that do not
show the distortion. Yet, when we attempt to test a subject,
we obtain electrical noise that distorts the EEG completely.
Could this be an amplifier problem? The booths are only a year
old and we have been able to collect good data a month ago.
If anyone has any
experience in eliminating such noise, we would appreciate any
suggestions. Please email me at : mh2s at virginia.edu
Thanks to all.
Mun-Wai Hon UVA Electrophysiology Lab