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phon

[ fon ]
/ fɒn /
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noun

a unit for measuring the apparent loudness of a sound, equal in number for a given sound to the intensity in decibels of a sound having a frequency of 1000 cycles per second when, in the judgment of a group of listeners, the two sounds are of equal loudness.

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Origin of phon

First recorded in 1930–35, phon is from the Greek word phōnḗ voice

Definition for phon (2 of 3)

phon-

variant of phono- before a vowel: phonic.

Definition for phon (3 of 3)

phon.

abbreviation

phonetics.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

British Dictionary definitions for phon (1 of 2)

phon
/ (fɒn) /

noun

a unit of loudness that measures the intensity of a sound by the number of decibels it is above a reference tone having a frequency of 1000 hertz and a root-mean-square sound pressure of 20 × 10 –6 pascal
C20: via German from Greek phōnē sound, voice

British Dictionary definitions for phon (2 of 2)

phon.

abbreviation for

Also: phonet phonetics
phonology
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

Medical definitions for phon

phon-

pref.

Variant ofphono-
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

Scientific definitions for phon

phon
[ fŏn ]

A unit of apparent loudness. The loudness of a signal in phons is equal to the intensity in decibels of a 1,000-hertz tone judged to be as loud as the signal being measured.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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