15/24
Ch. 6: Logarithmic Unit
The Decibel

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16/24
•
Engineers deal with data that can take on values
over a
HUGE
range!!!
– Plotting this on a “linear” scale doesn’t show the data
well
Logarithmic Scale
i.e., Plotting Y vs. X
– so use “logarithmic” scale(s)
•
Y on
log
axis vs. X on
linear
axis,
or
•
Y on
linear
axis vs. X on
log
axis,
or
•
Y on
log
axis vs. X on
log
axis,
… depends on data
– The following plots illustrate this!
•
Two sets of data that are very different, but you can’t see it
on the linear scale!!!