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.
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. sone definition
This formula is an idealization. The exact sone value for a given dB SPL depends on frequency, as the human ear is not equally sensitive to all frequencies. The sone is a perceptually relevant unit that
1. Executive Summary