a unit of subjective sound loudness. One sone is the loudness of a pure tone of frequency one kilo hertz and strength 40 decibels. A sound has loudness sones if a listener judges it to be times louder than a sound of 1 sone. The phon is another unit of sound loudness; a sound of loudness phons has loudness 2( - 40)/10 sones. The sone is often used in industrial engineering to express the perceived loudness of engines, fans, and other items of industrial equipment. The unit was introduced by S.S. Stevens and H. Davis in 1938. Its name is from the Latin word sonus, sound.
a unit of perceived loudness equal to the loudness of a 1000-hertz tone at 40 dB above threshold
a linear measure of noise loudness
a measure of sound level used by appliance manufacturers
an internationally recognized measurement of sound output
an internationally recognized unit of loudness
The unit of perceived loudness. One sone is the loudness of a 1000 Hz tone at a sound pressure level of 40 dB. Two sones would be twice as loud and, at middle and high frequencies, that would require an increase in sound level of about 10 dB. At low frequencies it would require less. See: Loudness, Equal-Loudness Contours, Sound Pressure Level.
One sone is defined as the loudness of a 1,000-Hz signal with the pressure of 40 decibels.
The sone is a unit of perceived loudness N after a proposal of S. Smith Stevens in 1936. In acoustics, loudness is a subjective measure of the sound pressure.