To Fish, it was clear that ocean creatures were far noisier than anyone had guessed. Sound waves travel through water efficiently—five times faster than through air—but, as Fish hastened to ...

Sound waves travel through different types of matter, including liquid water. Importantly, the movement of ocean water can greatly affect how sound waves travel from one point to another.

"As you take in a beautiful view of the ocean, do you think of sound?" writes columnist Lisa Wooninck. "There is a lot of it beneath the waves! Natural sounds are generated by wind, rain, waves, ...