Step 6: Conduct Data Analysis  2/7
•Calculate signal to noise ratio, S/N, a metric in decibels
Useful output
Harmful output
S/N =
Effect of Mean
Variability around mean
=
= 10 log
y2
s2
Note: This is one of many forms of S/N ratios.
                    variability
S/N gain      reduction
       3                27%
       6                50%
      12               75%