Loudness level

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3-1-190

Alternative term: Equivalent loudness

The loudness level of a sound is the sound pressure level of a standard pure tone (1000 Hz) which, according to the median value of judgements of normal observers, is assessed as being equally loud with the sound.


Note: The unit of loudness level is the Phon.

Reference: C.E.F.




Please note that this is the term as it stands in the original IALA Dictionary edition (1970-1989)

Contrast

Celsius (previously Centigrade)

Capacitance

Illuminance

Energy

force

Farad

Fahrenheit

International Association of Marine Aids to Navigation and Lighthouse Authorities - AISM