from The American Heritage® Dictionary of the English Language, 4th Edition
- n. 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.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. 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
from The Century Dictionary and Cyclopedia
- An old spelling of soon.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a unit of perceived loudness equal to the loudness of a 1000-hertz tone at 40 dB above threshold
Latin sonus, a sound; see swen- in Indo-European roots.(American Heritage® Dictionary of the English Language, Fourth Edition)