Use a formula-bearing logarithmic scale
The comparison level is defined by the following formula. The raw measured quantity Q is measured in relative units
\[L = 3\log_{10}\left(\frac{Q}{Q_0}\right)\]
\[Q_0 = 10\]
The quantities and levels in this item are defined only by the displayed formula
The raw measured quantity is
\[Q = 10000\]
The unit is relative units