# Shared Flashcard Set

## Details

lab 4
dfdf
16
Kindergarten
03/10/2014

Term
 what is on the x-axis
Definition
 used to determine wave frequency, time is the measurement,seconds are the units
Term
 what is on the y-axis
Definition
 units are in millivolts,measurement is electrical activity, used for amplitude of the wave
Term
 Explain when one might use a single point on a graph and when would use a range. What is the benefit of each?
Definition
 One might use the single point if trying to determine the amplitude of the wave at an exact point in time.,One might use a single point when trying to determine the exact time at which an event occurred.,One would use a single point when using the VALUE setting., One would use a range to have the computer determine the a maximum or minimum value in a peak or trough, respectively., One would use range to allow the computer to generate the most accurate measure of maximum or minimum., One might use a range to measure a duration (how much time passed) from one point to another
Term
 human error
Definition
 The more measurements that are taken (e.g., A-B, B-C, C-D, three measurements), the greater the potential of human error.
Term
 Given that BIOPAC can be used to measure the electrical activity in the body...Measurement, Organ or System
Definition
 Electrocardiography, Heart, Electromyograpy, Skeletal Muscle, Electroencephalography, Brain
Term
 amplitude
Definition
 is the distance of a data point on the line from the baseline
Term
 baseline
Definition
 line in the middle that measures distance above and below the baseline. positive and negative.
Term
 trough
Definition
 lowest point of a dip below the baseline
Term
 peak
Definition
 the highest point of a wave above the line
Term
 wave cycle
Definition
 is considered to be the amount of time it takes a waveform to go from one peak or trough, to the next peak or trough
Term
 frequency
Definition
 as the number of cycles per seconds.
Term
 hertz
Definition
 unit of measurement for frequency
Term
 periodic
Definition
 waveforms with constant frequency
Term
 non-periodic
Definition
 waveforms with variable intervals of time between peaks or troughs
Term
 in-phase
Definition
 when two waveforms add together and result in a complex waveform, that creates a greater amplitude
Term
 out-of-phase
Definition
 added together that cancel each other out
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