Hi all,
I would simply say that every situation, like every research, has its
own=
features and its own needs. In my particular case, acoustic surveys with
towed arrays of hydrophones, the ability to do continuous recordings
24h/day for weeks is the key to get the results we are searching for.
Recording 40GB/day, maybe for 2 weeks with no interruption, is a big
challenge. Though no one has a software smart enough to recognize what to
record and what to discard. Thus we prefer to record everything and to do
continuous monitoring with headphones and real-time spectrograms to
classify the sounds we receive into a limited set of easily identifiable
sound categories. This is done continuously, 24h/day by rotating trained
operators, with a 1 minute accuracy. At the end of each cruise we can
produce a GIS map of what sounds were recorded and where. Then we use this=
data as an index to recordings, to easily focus on interesting cuts. Also,=
we test different automatic recognition algorithms on our data sets and we=
make comparisons with what the operators did. Maybe in future we will be
able to discard all those cuts with no interesting sounds.
Gianni
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