Loudness::sound    Loudness::duration    Level::pressure    Olson::title    Sounds::hearing    Levels::power


Loudness is the characteristic of a sound that is primarily a psychological correlate of physical strength (amplitude). More formally, it is defined as "that attribute of auditory sensation in terms of which sounds can be ordered on a scale extending from quiet to loud".<ref>American National Standards Institute, "American national psychoacoustical terminology" S3.20, 1973, American Standards Association.</ref>

Loudness, a subjective measure, is often confused with objective measures of sound strength such as sound pressure, sound pressure level (in decibels), sound intensity or sound power. Filters such as A-weighting attempt to adjust sound measurements to correspond to loudness as perceived by the typical human. However, loudness perception is a much more complex process than A-weighting.<ref name=Olson1972/>

Loudness is also affected by parameters other than sound pressure, including frequency, bandwidth and duration.<ref name=Olson1972>{{#invoke:Citation/CS1|citation |CitationClass=journal }}</ref>

Loudness sections
Intro   Explanation    Hearing loss   Compensation  Normalization  Measurement  See also  References  

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