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Definition of Phon
1. Noun. A unit of subjective loudness.
Definition of Phon
1. Noun. A unit of apparent loudness, equal in number to the intensity in decibels of a 1,000-hertz tone judged to be as loud as the sound being measured. ¹
¹ Source: wiktionary.com
Definition of Phon
1. a unit of loudness [n -S]