Used
to study the movement of ocean currents, underwater sound
beacons emit a specific tone that can be recorded and timed
by neutrally buoyant floats. This example was recorded by
the autonomous hydrophone array in the Gulf of Alaska. The
signal ramps up to about 270Hz and lasts for about 3 minutes.
Click
on spectrogram
for full-sized image.
1,697K
wav file(The
recorded signal has been sped up 2 times)
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