loudness level


loudness level

[′lau̇d·nəs ‚lev·əl] (acoustics) The level of a sound, in phons, equal to the sound pressure level in decibels, relative to 0.0002 microbar, of a pure 1000-hertz tone that is judged to be equally loud by listeners.

loudness level

Of a sound, the sound-pressure level of an equally loud 1,000-Hz pure tone, expressed in units called phons.