Phon Definition & Meaning | Merriam-Webster Medical

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phon

noun

ˈfän : the unit of loudness on a scale beginning at zero for the faintest audible sound and corresponding to the decibel scale of sound intensity with the number of phons of a given sound being equal to the decibels of a pure 1000-hertz tone judged by the average listener to be equal in loudness to the given sound

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phocomelus phon phonasthenia See all Nearby Words

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“Phon.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, https://www.merriam-webster.com/medical/phon. Accessed 30 Dec. 2025.

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