# Translations:Illustrations of spectra/19/en

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Let us look at the equal-delay wavelet (1, –1) and the corresponding reverse wavelet (–1, 1) (Figure 11). By definition, an equal-delay wavelet is both a minimum-delay wavelet and a maximum-delay wavelet. The common V-shaped amplitude spectrum touches 0 at frequency 0. The figure shows two lines, one through on the vertical axis and the other through on the vertical axis. The minimum-delay phase spectrum is made up of the left side of the line that goes through and the right side of the 26.6° line that goes through . The opposite is true for the maximum-phase spectrum. These two phase spectra add up to the line (thin line).