phon

phon  (fn)

n.

A unit of apparent loudness, equal in number to the intensity in decibels of a 1,000-hertz tone perceived to be as loud as the sound being measured.

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[German, from Greek phn, sound; see phone¹.]

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phon  (fn)

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.

Thesaurus

Noun

1.

phon - a unit of subjective loudness sound unit - any acoustic unit of measurement sone - a unit of perceived loudness equal to the loudness of a 1000-hertz tone at 40 dB above threshold