A standardized unit of perceived loudness. A graph of sones vs. SPL shows, for any constant SPL, the relative loudness the ear perceives at each frequency, i.e., the inverse of the equal loudness curves.
A standardized unit of perceived loudness. A graph of sones vs. SPL shows, for any constant SPL, the relative loudness the ear perceives at each frequency, i.e., the inverse of the equal loudness curves.