Bark scale
Auditory frequency metric / From Wikipedia, the free encyclopedia
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The Bark scale is a psychoacoustical scale proposed by Eberhard Zwicker in 1961. It is named after Heinrich Barkhausen who proposed the first subjective measurements of loudness.[1] One definition of the term is "...a frequency scale on which equal distances correspond with perceptually equal distances. Above about 500 Hz this scale is more or less equal to a logarithmic frequency axis. Below 500 Hz the Bark scale becomes more and more linear."[2]
The scale ranges from 1 to 24 and corresponds to the first 24 critical bands of hearing.[3]
It is related to, but somewhat less popular than[citation needed], the mel scale, a perceptual scale of pitches judged by listeners to be equal in distance from one another.