sone

[sohn]
noun
  1. a unit for measuring the loudness of sound, equal to the loudness of a sound that, in the judgment of a group of listeners, is equal to that of a 1000-cycle-per-second reference sound having an intensity of 40 decibels.

Origin of sone

1945–50; < Latin sonus sound1
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British Dictionary definitions for sones

sone

noun
  1. a subjective unit of loudness equal to that experienced by a normal person hearing a 1 kHz tone at 40 dB

Word Origin for sone

C20: from Latin sonus a sound
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for sones

sone

n.

unit of loudness, 1936, from Latin sonus (see sound (n.1)).

Online Etymology Dictionary, © 2010 Douglas Harper