# Translations:Illustrations of spectra/15/en

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Let us look at the minimum-delay wavelet (1, –0.5) and the corresponding maximum-delay wavelet (–0.5, 1). Figure 9 shows the common-amplitude spectrum (dashed line) of these two wavelets. The amplitude spectrum is a valley-shaped curve with its trough at frequency 0. In other words, the amplitude spectrum is that of a high-pass filter. We see that the minimum-phase spectrum (thick line) and the maximum-phase spectrum (medium-thick line) add up to a line (thin line). Note that the two phase curves in Figure 9 are farther apart than are the two phase curves in Figure 6.