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critical frequency bands

The division of the audible frequency spectrum into critical frequency bands, made by Heinrich Barkhausen, reflects the resolution behavior of the human ear.

Upper frequencies of the critical frequency bands

Upper frequencies of the critical frequency bands

The critical frequency bands are the frequency bands that are covered by masking. They have different bandwidths, decreasing to lower frequencies and increasing to higher ones. The range of frequencies perceived by the ear can be divided into 27 critical frequency bands, which are replicated in 32 bandpass filters during audio compression in MPEG, MP3, mp3Pro and ATRAC. The lower frequency bands below 500 Hz have a bandwidth of less than 100 Hz, the bands above 500 Hz correspond to a sixth of an octave.

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Englisch: critical frequency bands
Updated at: 05.07.2007
#Words: 111
Links: frequency (f), resolution, masking, audio compression, moving picture experts group (MPEG)
Translations: DE
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