Loudness Sones – Fully Tested

A sone is a unit of loudness that represents the perceived loudness of a sound. It is defined such that:

The math is straightforward. A sound of 2 sones is exactly twice as loud as 1 sone. A sound of 4 sones is twice as loud as 2 sones, and four times as loud as 1 sone. loudness sones