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Spectral Audio Signal Processing
Time-Frequency Displays
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Specific Loudness
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Specific Loudness
Figure 6.6 shows the specific loudness computed from the excitation pattern of Fig.6.4. As mentioned above, it is a compressive nonlinearity that depends on level and also frequency.
![\includegraphics[width=\twidth]{eps/lsg-sl}](http://www.dsprelated.com/josimages_new/sasp/img1055.png)
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Julius Smith's background is in electrical engineering (BS Rice 1975, PhD Stanford 1983). He is presently Professor of Music and Associate Professor (by courtesy) of Electrical Engineering at Stanford's Center for Computer Research in Music and Acoustics (CCRMA), teaching courses and pursuing research related to signal processing applied to music and audio systems. See http://ccrma.stanford.edu/~jos/ for details.
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