Wide-band (upper half, 5 ms) and narrow-band (lower half, 43 ms) spectrograms
(Hann window, 4 times zero-padded, fixed grey-scale) of [paza] by
PJ, computed (top) from the original signal s(n), (middle) from the
periodic estimates of the voiced component v(n), and (bottom) from
the aperiodic estimates of the unvoiced component u(n).