It is called the water table or phreatic surface.
You can convert the loudness in sones to the loudness level in phons. 4 sones equals 60 phons. Scroll down to related links and read "Correlation between sones und phons".
The higher the sones the louder the sound. For example bathroom ceiling fans usually are within 1 to 5 sones. I would say somewhere in between would suffice. Another example of how loud sones are is your refrigerator they usually range between 1 to 2 sones.
Scroll down to related links and use the nice calculator "Correlation between sones und phons - Loudness level LN in phons to loudness N in sones and Loudness N in sones to Loudness level LN in phons"
You can convert the loudness in sones to the loudness level in phons. To convert the sound pressure level in dB or dBA to loudness in sones is not possible. Scroll down to related links and read "Correlation between sones und phons".
You can convert the loudness in sones to the loudness level in phons. 8.5 sones equals 70.9 phons. The convertion from sone to dB is only a guess. Scroll down to related links and read "Correlation between sones und phons".
Allan Sones's birth name is Allan Thomas Sones.
50 phons (decibels) is equivalent to 2 sones.
The loudness level at 90 dB for a 4000 Hz tone is 7 sones. Sones are a unit of perceived loudness.
F. Mason Sones died in 1985.
F. Mason Sones was born in 1918.
Sonya Sones was born in Newton, Massachusetts, United States.
Allan Sones was born on September 27, 1924, in London, England, UK.