The logarithmic scale is appropriate to represent things that behaves in a logarithmic way. A linear scale would be hard to manage since you'd often end up with

The logarithmic scale is appropriate to represent things that behaves in a logarithmic way. A linear scale would be hard to manage since you'd often end up with extremely small and extremely large values next to each other which would be painful to represent and think about. Take a typical filter response graph for instance: https://iowegian.com/wp-content/uploads/2015/04/rcfreq.gif https://iowegian.com/wp-content/uploads/2015/04/rcfreq.gif Try graphing that with a linear scale, there won't be a lot to see I wager. It's true that it does take a little time to familiarize oneself with non-linear units at first (especially if one wants to add or subtract them for instance) but they have their uses. For measuring a signal they're clearly appropriate.