Real-time digital median frequency estimator for surface myoelectric signals.
A prototype instrument is described that uses a digital signal processor to estimate the median frequency of the myoelectric signal in real time. A set of tenth-order digital low-pass filters is used to track the median frequency. An estimate of frequency is obtained once every 256 ms with a resolution of 1 Hz.
Pratt
A J
AJ
Division of Biomedical Engineering, University of Saskatchewan, Saskatoon, Canada.
Gander
R E
RE
Brandell
B R
BR
D000465:Algorithms; D003199:Computer Systems; D004576:Electromyography; D008991:Monitoring, Physiologic; D012815:Signal Processing, Computer-Assisted; D013499:Surface Properties