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American Focus > Blog > Tech and Science > Deep Ocean Sound Confused Scientists For Years. We Finally Know What Makes It. : ScienceAlert
Tech and Science

Deep Ocean Sound Confused Scientists For Years. We Finally Know What Makes It. : ScienceAlert

Last updated: September 25, 2024 9:50 am
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Deep Ocean Sound Confused Scientists For Years. We Finally Know What Makes It. : ScienceAlert
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A Fascinating Discovery: The Mystery of the Biotwang Sound Unveiled

A mysterious sound heard booming from deep under the ocean waves has finally been traced to a fascinating source. First recorded in 2014 in the west Pacific, the “biotwang” is actually the call of the Bryde’s whale (Balaenoptera brydei) traveling long distances in the open ocean. What’s more, the techniques used to identify the sound have led to the development of a new tool for understanding whale populations and how they move about in and inhabit Earth’s enigmatic seas.

According to a team led by biological oceanographer Ann Allen of NOAA Pacific Islands Fisheries Science Center in Hawaii, “Bryde’s whales occur worldwide in tropical and warm temperate waters, but their population structure and movements are not well understood.”

The ocean is full of strange noises, but biotwangs – strange, mechanical-sounding features above a certain frequency – have been a particular puzzle. They were first picked up in the Mariana Archipelago during an autonomous sound survey conducted by Oregon State University; two years later, with only the sound recordings to go on, scientists presumed the culprit was likely some sort of baleen whale.

Now, the ocean isn’t exactly easy to study. It’s a pretty hostile environment to humans; we can’t just go poking around in it. But NOAA has been conducting ongoing monitoring of the ocean for a long time, and 23 years ago, they installed a new system off California’s coast to remotely keep track of the soundscape.

If Bryde’s whales are the source of the biotwangs, then the sounds should have been recorded by the monitoring project, and they should be consistent with the whales’ migration patterns.

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But there’s a big problem. Multiple recorders running for more than two decades produce an incredible volume of data. In order to comb through it all and find the signals they were looking for, Allen and her colleagues enlisted the aid of Google to design an algorithm that could pore over the data and tease out the biotwangs.

Having traced the sound to its source gives the scientists a new way to track and understand the population distribution and migration patterns of Bryde’s whales around the world. In addition, the AI tool can be tweaked to identify other sounds, and their temporal patterns, to figure out where other marine mammals are going and when.

Scientists hope that this information will help them, in turn, figure out ways to protect the amazing giants that inhabit our world’s wild oceans.

The research has been published in Frontiers in Marine Science.

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Curated news websites are a great way to stay up-to-date on current events without having to sift through endless articles and news sources. These websites typically feature a mix of local, national, and international news, ensuring that readers are getting a well-rounded view of what’s happening in the world.

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TAGGED:ConfuseddeepFinallyOceanScienceAlertScientistsSoundYears
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