User`s manual

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Figure 4-42 SIF Recall Settings Window
Examples of Spectral Inverse Filters:
In the examples below, SIF will equalize a voice spectrum using various Equalize Voice Filter
Amounts and Output Shapes. When the Filter Amount is small, only the peaks in the spectrum are
flattened. As the Filter Amount is increased, lower energy segments are equalized. The top trace in
each of the figures below gives the filter curve and the bottom trace gives the original input spectrum.
In Figure 4-43, Figure 4-44, and Figure 4-45 the EQ Range is increased. Each increase in Range is
accompanied by an increase in compensating Gain. Compare the filter curve (top) to the original input
spectrum (bottom). As the Filter Amount is increased, more peaks are attenuated. Figure 4-45
completely compensates all peaks and valleys. Note also how the 40 dB attenuation outside the two
Limits is affected.
Figure 4-43 Equalize Voice operation, Filter Amount set to 60%, Output Shape set to Flat