Hans J Scheer et al 2006 Physiol. Meas. 27 109 doi:10.1088/0967-3334/27/2/002
Hans J Scheer, Tilmann Sander and Lutz Trahms
Show affiliationsFirst, the intrinsic random noise sources of a biopotential measurement in general are reviewed. For the special case of an electroencephalographic (EEG) measurement we have extended the commonly used amplifier noise model by biological generated background noise. As the strongest of all noise sources involved will dominate the resulting signal to noise ratio (S/N), we have investigated under which conditions this will be the case. We illustrate experimentally that up to 100 Hz S/N practically depends only on cortical generated background noise, while at a few hundred Hz or more amplifier and thermal noise of interelectrode resistance are the major sources.
87.80.-y Biophysical techniques (research methods)
87.19.R- Mechanical and electrical properties of tissues and organs
Issue 2 (February 2006)
Received 22 July 2005, accepted for publication 22 November 2005
Published 19 December 2005
Hans J Scheer et al 2006 Physiol. Meas. 27 109
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