Blue Whale (Balaenoptera musculus): The blue whale, Earth’s largest animal, produces low-frequency calls up to 188 decibels, audible over 1,000 miles underwater. These deep moans, typically around 10–40 Hz, travel efficiently through the ocean’s SOFAR channel, allowing long-distance communication. Scientists believe they use these calls to find mates or coordinate movements across ocean basins. The sound is generated by forcing air through vocal structures, though the exact mechanism remains partially unknown. Their calls have decreased in frequency over decades, possibly due to rising ocean noise or changes in population density. The blue whale’s voice underscores the scale of marine communication and the impact of human activity on ocean acoustics.
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