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Equivalent Rectangular Bandwidth (ERB)

As discussed in Section 3.4, excitation patterns are functions of frequency--that is, they give the average neural activity for each audible frequency. When plotting excitation patterns and excitograms, it is preferable to view frequency in terms of Equivalent Rectangular Bandwidth (ERB). A corresponding frequency expressed in terms of ERB-rate is scaled in a manner that gives a more psychoacoustically appropriate weighting to a given frequency range than would be obtained if Hz were used to measure frequency. The formula to compute a frequency in terms of ERB-rate from a given frequency $f$ in Hz is:

\begin{displaymath}
ERB_{\mathrm{rate}} = 21.4 \log_{10} \left( 0.00437 f + 1 \right).
\end{displaymath} (1)


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Download psychoacoustics.pdf

``Psychoacoustics Lab Activity'', by Ryan J. Cassidy and Julius O. Smith III,
REALSIMPLE Project — work supported by the Wallenberg Global Learning Network .
Released 2008-06-05 under the Creative Commons License (Attribution 2.5), by Ryan J. Cassidy and Julius O. Smith III
Center for Computer Research in Music and Acoustics (CCRMA),   Stanford University
CCRMA