Researchers captured the sounds of distant whale calls in the Santa Barbara Channel using recording devices nearly 2,000 feet below the surface. They also captured the extra noise that can be created by container ships and industrial activity. The spectrograms below provide a visual representation of the sounds. Lower frequencies, or pitches, appear lower in the image. Higher amplitudes, or louder sounds, produce brighter colors.
↑ Higher frequency
Humback whales
Scripps Institution of Oceanography
Sean Greene LOS ANGELES TIMES