A banded spectrogram is indicative of the sound produces by
a ship's screw. The location of the frequency bands and other
characteristics of the sound can be used to infer the style
of ship. This spectrogram probably represents a relatively
small vessel moving at high speed.
Click
on spectrogram
for full-sized image.
809K
wav file(The
recorded signal has been sped up 10 times)
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