The phon is a logarithmic unit of loudness level for tones and complex sounds. Loudness is measured in sones, a linear unit.

The Greek root word phon means “sound.” This word root is the word origin of a number of English vocabulary words, including microphone, phone, and saxophone. An easy way to remember that phon means “sound” is through the word symphony, which is many instruments making a “sound” together.

The use of the phon as a unit of loudness is an improvement over just quoting the level in decibels, but it is still not a measurement which is directly proportional to loudness. Using the rule of thumb for loudness, the sone scale was created to provide such a linear scale of loudness.

2 天之前 · The meaning of PHON is 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.

phon, unit of loudness level. The loudness level of a sound is a subjective, rather than an objective, measure. To measure loudness, the volume of a 1,000-hertz reference tone is adjusted until it is perceived by listeners to be equally as loud as the sound being measured.

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 …

PHON definition: a unit of loudness that measures the intensity of a sound by the number of decibels it is... | Meaning, pronunciation, translations and examples in American English

Define phon. phon synonyms, phon pronunciation, phon translation, English dictionary definition of phon. 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....

Phon definition: A measure of the apparent loudness level of a sound with respect to a 1,000-cycle-per-second pure tone: based on the subjective judgment of the human ear or on objective comparisons of acoustical measurements.

3 meanings: a unit of loudness that measures the intensity of a sound by the number of decibels it is above a reference tone.... Click for more definitions.