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
Word origin
C20: via German from Greek phōnē sound, voice
phon. in British English
abbreviation for
1. Also: phonet
phonetics
2.
phonology
phon in American English
(fɑn)
noun
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