Non-linear amplification of electromyographic signals with particular application to human chewing.
A method is described for logarithmically-amplifying electromyographic signals so that the most commonly-occurring events within them are enhanced selectively before digital conversion. There is a need to resolve low and intermediate levels of activity during chewing, while preserving the occasional high-level responses. Besides achieving a higher resolution in subsequent digital sampling, this signal-processing technique increased the representation of low and intermediate activities in polygraphic displays. It further ensured that signals were presented to the A/D converter within the code width of the instrument.
D000669:Amplifiers, Electronic; D000703:Analog-Digital Conversion; D004576:Electromyography; D006801:Humans; D007568:Jaw / Q000502:physiology; D008409:Mastication; D009068:Movement; D013703:Temporal Muscle / Q000502:physiology