phon

About 0.08 uses per million words.

Meaning

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.

Similar words

loudness sone phonon phot volume phononics hyperphonon magnetophonon planck magnitude

Often followed by

is scale and for contour curve sound curves loudness