lab 1 - Introduction to Biological Signal Acquisition The...

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Introduction to Biological Signal Acquisition. The human EEG Dr. J.C. Martinez-Trujillo PHYG 212 Pre-laboratory lecture
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http://www.whale-images.com/whale-sounds.htm
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http://www.seaworld.org/infobooks/Beluga/becommunication.html
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Signals A signal is an abstract element of information. Functions of one or more independent variables that contain information about the behavior of some phenomenon.
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EKG Spirogram EEG Biological signals examples
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EKG Spirogram EEG Biological signals examples
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Types of signals Deterministic: It is predictable for the time span of interest. e.g., a sine wave: V(t) = sin(2*pi* ω * t); V(t) is the signal over time (t) and ‘ ω the frequency. Stochastic or Random : A signal whose value has some element of chance associated with it, therefore it cannot be predicted exactly.
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What kind of signal is this?
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Signal amplification Amplifier: A device that tracks the amplitude of an incoming signal and proportionally increases the voltage, current or power of the signal by using power from another source. Gain: It is the factor by which the amplifier multiplies the signal. If gain =1 , the signal does not change If gain >1 , the signal is amplified If gain <1 , the signal is reduced
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Gain=1
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This note was uploaded on 02/16/2011 for the course PHGY 212 taught by Professor Juliomartineztrujillo during the Fall '10 term at McGill.

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lab 1 - Introduction to Biological Signal Acquisition The...

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