科学家们数十年来一直记录到海洋中一些奇怪的低频声音，被称为“生物鸭”。最近，研究人员重新分析了1982年在斐济盆地记录的一段神秘声音，发现它可能是不同海洋动物之间的交流。这些声音最初被认为是机械声，但研究发现，它们来自多个不同地点的动物，并且存在着类似对话的现象，例如一个动物发出声音时，其他动物会保持安静，然后轮流回应。虽然此前认为这些声音来自小须鲸，但缺乏直接证据，但可以肯定的是，这些声音来自动物，很可能就是鲸类发出。

🐳 **神秘声音的发现:** 科学家们长期以来记录到海洋中存在一些奇怪的低频声音，被称为“生物鸭”，其来源一直是个谜。

🗣️ **动物间的交流:** 研究人员分析发现，这些声音很可能是不同海洋动物之间的交流，它们会轮流发出声音并相互回应，类似于对话。

📡 **声源定位与分析:** 科学家们通过拖曳水听器阵列记录这些声音，发现声音来自多个不同地点的动物，并且在交流过程中存在着类似“你一言我一语”的现象。

🐋 **潜在声源：鲸类？:** 虽然此前认为小须鲸是声源，但缺乏直接证据，但这些声音极有可能来自鲸类等海洋哺乳动物，因为它们以其复杂的声呐交流而闻名。

🤔 **未解之谜:** 虽然研究揭示了这些声音的本质，但关于这些动物交流的内容、目的等问题，仍有待进一步探索。

Both scientists and sailors alike have recorded unique, strange noises in the ocean for decades. They sound guttural, and alien.

The sound is dubbed the "bio-duck" — though it doesn't sound like a duck — and you can hear an example of a recording below. Researchers have now reanalyzed one of these mysterious recordings from 1982, documented in the Pacific Ocean's South Fiji Basin, and concluded that it's a conversation between different animal speakers.

"Maybe they were talking about dinner, maybe it was parents talking to children, or maybe they were simply commenting on that crazy ship that kept going back and forth towing that long string behind it," Ross Chapman, an underwater acoustics researcher from the University of Victoria and an author of the research, said in a statement.

At first, earlier listeners thought the deep sea sounds weren't natural. "They heard this sound, which is a low-frequency pulse of sound which is very regular. It almost sounds mechanical," Denise Risch, a National Oceanic and Atmospheric Administration marine biologist, previously noted. "So if you first hear it, you wouldn't necessarily think it's an animal, but it's very loud and very pervasive. You could hear it in the wintertime across the Southern Ocean."

Scientists recorded these unusually mechanical noises using an array of hydrophones, which detect underwater sounds, that they towed behind a vessel. The different hydrophones allowed the researchers to identify different speakers.

"We discovered that there were usually several different speakers at different places in the ocean, and all of them making these sounds," Chapman explained. "The most amazing thing was that when one speaker was talking, the others were quiet, as though they were listening. Then the first speaker would stop talking and listen to responses from others."

Earlier research concluded Minke whales, the smallest species of baleen whale, created these underwater sounds. Yet there was never any sighting of the whales coming up for air to confirm this.

It is clear, however, these unusual sounds are coming from animals. And it certainly wouldn't be surprising if it were whales. These intelligent, cultured marine mammals, for example, fill the ocean with song.