The signal was recorded in the northeast Pacific. It has been sped up ten times, raising the pitch to 520 Hz (C5). The sonic signature is that of a whale, albeit at a unique frequency. The call patterns resemble neither blue nor fin whales, being much higher in frequency, shorter, and more frequent.[5] Blue whales usually vocalize at 10–39 Hz,[2] fin whales at 20 Hz.[1] The calls of this whale are
![52-hertz whale - Wikipedia](https://cdn-ak-scissors.b.st-hatena.com/image/square/86bacf235208150ee757c6157cd4818abc9336c2/height=288;version=1;width=512/https%3A%2F%2Fupload.wikimedia.org%2Fwikipedia%2Fcommons%2Ff%2Ff7%2FAkblue52a_256_064c.jpg)