a subjective unit of loudness for an average listener equal to the loudness of a 1000-hertz sound that has an intensity 40 decibels above the listener's own threshold of hearing
= The unit of measurement for loudness One sone is the loudness of a sound whose loudness level is 40 phons Loudness is proportional to the sound's loudness rating, e g , two sones are twice as loud as one sone
A subjective unit of loudness, as perceived by a person with normal hearing, equal to the loudness of a pure tone having a frequency of 1,000 hertz at 40 decibels
a subjective unit of loudness for an average listener equal to the loudness of a 1000-hertz sound that has an intensity 40 decibels above the listeners own threshold of hearing