| 摘要 |
A system (10) for determining if signals present at bioelectric sensors (17, 20, 43, 45) derive from an intended source (12) or from different, localized sources or artifacts includes a first sensor (17) placed to detect the electric potential of interest (16) and generate a first electric signal (19) possibly representative of the electric potential of interest (16) and a second sensor (20) placed near the first sensor (17) and preferably a relatively large distance away from the source (12). The second sensor (20) detects the electrical potential of interest (16) and generates a second electrical signal (22) which also possibly represents the electrical potential of interest (16). An electronic circuit determines whether a difference between the electrical signals (19, 22) exceeds a certain threshold, thus indicating that either one or both of the signals (19, 22) is a measure of an artifact and not the electric potential of interest (16). |
