Sone Definition ((hot)) May 2026

[ \textSones = 2^\left(\frac\textPhons - 4010\right) ]

| Sound Source | Approximate Sones | Approximate Phons / dB SPL | |--------------|------------------|----------------------------| | Quiet library, soft whisper | 1 sone | 40 dB | | Normal conversation (3-5 ft) | 2-4 sones | 50-60 dB | | Busy street traffic | 8-16 sones | 70-80 dB | | Loud music, vacuum cleaner | 32-64 sones | 90-100 dB | sone definition

The sone is related to the decibel, but the relationship is non-linear. A common approximation used for converting sound pressure level (phon, a unit of loudness level) to sones is: [ \textSones = 2^\left(\frac\textPhons - 4010\right) ] |

1. Executive Summary

The is a unit of loudness , a psychoacoustic measure of how loud a sound is perceived by the human ear. Unlike physical measures of sound pressure (decibels), the sone scale is linear and directly proportional to perceived loudness. A sound rated as 2 sones is perceived as twice as loud as a sound rated as 1 sone. Unlike physical measures of sound pressure (decibels), the

The sone is a perceptually relevant unit that quantifies how loud a sound feels , rather than its physical energy. Its linear scaling makes it intuitive for comparing loudness differences, and it is essential in product design, architectural acoustics, and hearing research.