We provide two examples of the application of our system. For
each example, we provide both a spectrogram, which hints at the
capabilities of a conventional SMS system, and trajectory plot.
The trajectory plot includes the center frequency for each
detected peak (shown as a bold dot) and a line showing the linear
frequency trajectory estimated by our chirp detector. Because 50%
overlap of windows was used in our system, each linear trajectory
is extended only half way to the adjacent frame. Hence, the
trajectories should meet up between frames if our estimator is
accurate. Indeed, this can in general be seen.
We see that most of the information gleaned from the spectrogram
can be observed in our trajectory plot, and we recall that our
system is operating at one half the frame rate of the spectrogram.
Hence, we may consider our system an improvement to conventional
SMS in that we have both reduced the frame rate by a factor of 2
and captured the essential features of the signal.
In the first example figures, we see the female speech utterance
``you always'' and in in the second example figures the female
speech utterance ``example'' [10].
