- 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.
Origin of phon
First recorded in 1930–35, phon is from the Greek word phōnḗ voice
- variant of phono- before a vowel: phonic.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for phon
Steve might threaten what he liked, but jump Phon would not.
They say you go gamble, Chance he go gamble, Phon he go gamble too.
All right, Phon, I'll not leave you behind, even if I have to pack you on my own shoulders.
Phon had been driven ahead of Steve, as Corbett and Steve had arranged.
To Steve and Phon this yellow table-land was the region of fairy gold.
- 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
- Also: phonet phonetics
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
- Variant ofphono-
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
- 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.