A sone is an internationally recognized measurement of sound output. Sones translate decibel readings into numbers that correspond to the way people sense volume, and follow a "linear" scale, like inches (see chart below). Sone readings offer quick sound comparisons for laymen and engineers. 

Sone chart

Sound level situation

Sone level

How we feel

Traffic noise

8.0 / 7.0 / 6.0 / 5.0 / 4.0 / 3.0 / 2.0 / 1.5

Conversation with added noise


Normal conversation

Calm office

Night in suburbs


Comfortable zone free from noise

Rustling shrubs