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Shifting to virtual learning tomorrow

Is there anything else in the ocean that would make that sound? >> people have speculated it could have been harmonic from shipping or a pump motor or something where you have the primary frequency and shadow frequencies. i don't think that's the case, though. i think the other day when they got two hours and 20 minutes of good, solid pinger data, and i believe that's what it was, because they're not just listening at 37.5 but they also have spectrum analyzers that look at the wave form and look and they know exactly the frequency exactly what it is. they would not be talking about that as str...