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Unformatted text preview: • We use computers instead of oscilloscope Problem: Digital take discreet sample, real life is analog (continuous event) Solution: take more samples closer to reality Powerlab has A to D converter Electrical noise • Filter to get rid of noise 1.) Band pass – speakers 2.) AC Couple – sets nonchanging or slowly changing signals to zero 3.) DC Couple – allow signal through unchanged • Use: AC couple fast events (Action potentials) DC couple slow events (transducers) Grounding to reduce noise • Advantages: 1.) Decreases stimulus artifact 2.) Decreases noise less noise...
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- Winter '08
- Alternating Current, Measure biological event, couple slow events, ac couple, dc couple