In February 2026, researchers at the Woods Hole Oceanographic Institution (WHOI) made a discovery that quietly rewrote a chapter in marine science history. While digitizing a collection of fragile audograph discs in their archives, they identified what may be the earliest preserved recording of a whale — the song of a humpback, captured on March 7, 1949, near Bermuda. The scientists aboard the R/V Atlantis that day were testing sonar equipment for the U.S. Office of Naval Research. They had no idea what they were hearing.
The discovery matters for reasons that go far beyond historical curiosity. According to Laela Sayigh, a marine bioacoustician and senior research specialist at WHOI, the ocean is much louder now than it was in 1949, with increases in both the number and types of sound sources. This recording can provide insight into how humpback whale sounds have changed over time, as well as serving as a baseline for measuring how human activity shapes the ocean soundscape.
In other words, the 1949 recording isn’t just the oldest known whale song — it’s a window into an ocean that no longer exists, and a benchmark for understanding how profoundly that environment has changed.
What Whale Song Actually Is
Humpback whale song is one of the most complex and studied vocalizations in the animal kingdom. The song has an intricate nested hierarchy — acoustically distinct units are arranged into phrases, phrases form themes, and several themes together create a complete song. Only males sing, and the purpose is primarily reproductive — males produce these elaborate sequences during breeding season to attract females and signal their fitness.
What makes humpback song scientifically extraordinary is that it isn’t fixed. Male humpback whales sing a repetitive, stereotyped, socially learned, and culturally transmitted song display that slowly evolves each year. Most males within a population sing the same, slow-evolving song type. Every male in a given population sings the same version of the current song — and that version is constantly changing.
Annual Evolution and Song Revolutions
The gradual year-to-year evolution of humpback song has been documented extensively since Roger Payne’s landmark 1970 album Songs of the Humpback Whale first brought these vocalizations to public awareness — itself predated nearly two decades by the newly discovered 1949 WHOI recording.
But gradual evolution is only part of the story. In the South Pacific, song revolutions have led to rapid and complete replacement of one song type by another introduced from a neighboring population. These aren’t gradual shifts — they are wholesale cultural overhauls, where an entirely new song spreads through a population and displaces the previous one within a single breeding season.
The geographic pattern of how these revolutions travel is one of the most striking findings in whale song research. Songs first recorded off eastern Australia could be found around French Polynesia approximately 6,000 km away only one year later. Research published in Royal Society Open Science confirmed this transmission continues further east, with song themes recorded in French Polynesia in 2016 appearing in Ecuadorian recordings by 2018 — a cultural wave propagating across the Pacific over the course of just two years.
Novel songs are more likely to spread from larger to smaller populations, resulting in this characteristic eastward pattern of revolutions through South Pacific populations, where population sizes decrease from west to east.
Dialects and Regional Variation
Just as human languages diverge across geographies, humpback whale song shows meaningful regional variation. Populations in different ocean basins sing distinctly different songs, and even within the same ocean, the degree of song similarity decreases with geographic distance.
Research led by Whale Trust examining humpback populations across the North Pacific found that while songs from Japan, the Philippines, and Hawaii shared some common themes, those recorded in the closer regions of Japan and the Philippines were far more similar to each other than to the more distant samples from Hawaii. A subsequent multi-year collaborative study expanded this comparison across Hawaii, Mexico, Japan, and the Philippines, confirming that there is ongoing but annually variable mixing of humpback whale populations across the North Pacific.
These population-level differences function similarly to dialects — a humpback off the coast of Southern California is singing a meaningfully different song than one in Tonga, even if the underlying structure of the vocalizations shares common features.
How Noise Pollution Is Changing the Song
The ocean of 1949 that the WHOI recording captures was dramatically quieter than the one whales navigate today. Peter Tyack, a marine bioacoustician and emeritus research scholar at Woods Hole, noted that the ocean of the late 1940s was much quieter than today, and that the recovered recordings not only allow scientists to follow whale sounds but also tell us what the ocean soundscape was like at that time — something that is very difficult to reconstruct otherwise.
The consequences of a noisier ocean are measurable and ongoing. Research has found that to be heard over shipping noise, right whales have been making their calls higher-pitched by about half an octave since 1950 — effectively switching from being basses to being tenors to compensate for the low-frequency noise that is increasing.
Baleen whales, including humpbacks, produce low-frequency vocalizations that are particularly vulnerable to interference from ship engines, industrial activity, and sonar. Research has found that baleen whales make their songs in frequency ranges very close to the surface — exactly the right range and location to be drowned out by boats. CBC Radio When communication is disrupted, the consequences extend to feeding, navigation, mating, and social cohesion — functions that depend entirely on sound in a world where light barely penetrates.
Why It Matters — and What We Still Don’t Know
The 1949 WHOI recording provides something researchers rarely have: a true acoustic baseline. The discovery represents a rare baseline for understanding how whale communication may have evolved over the past 75 years. With that reference point, scientists can begin to quantify how much whale vocalizations have shifted in response to a fundamentally noisier ocean environment.
Questions remain. The precise mechanisms driving song revolutions — why all males in a population adopt a new song so rapidly and completely — are still actively debated in the literature. Whether song complexity correlates directly with reproductive success, and exactly how much noise pollution is altering song learning and transmission, are areas of ongoing research.
What is clear is that whale song is not a fixed biological trait but a living, culturally transmitted behavior — one shaped by evolution, social learning, environmental pressure, and the acoustic world whales inhabit. The fact that a 1949 recording made by researchers who didn’t know what they were hearing can now anchor that understanding is a remarkable testament to scientific curiosity and the value of preservation.
Hear It for Yourself
Humpback whales migrate through the waters off Southern California throughout the year — and Harbor Breeze Cruises offers year-round whale watching tours from Long Beach and San Pedro where you may encounter these extraordinary animals in their natural habitat. Check our live whale sightings page to see what’s been spotted recently, and book your tour at 2seewhales.com.
For more on the whales you might encounter offshore, read our posts on How Big Is a Blue Whale? and Types of Killer Whales and the New Species.