# Translations:Illustrations of spectra/13/en

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Let us look at the equal-delay wavelet (1, 1) and its corresponding reverse wavelet (1, 1), which is of course the same wavelet. Figure 8 shows their spectra. By definition, an equal-delay wavelet is both a minimum-delay wavelet and a maximum-delay wavelet. The hill-shaped amplitude spectrum touches zero at frequencies . The phase spectrum is the line (thick line) through the origin. This line added to itself gives the line (thin line).