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The equivalent rectangular bandwidth or ERB is a measure used in psychoacoustics. Researchers have derived a differential equation giving the ERB value in Hz of a human auditory filter with a center frequency of kHz rac = 6.23 cdot f^2 + 93.39 cdot f + 28.52 Solving this equation gives roughly the following relation between the ERB value and the frequency in Hz: v = 11.17268 cdot logleft(1 + rac ight) Or the converse: f = rac - 14678.49
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