By Zoe Pollock
Stefan Helmreich meditates on the act of cupping a seashell to one’s ear:
For generations, people who live by the sea have held that, when pressed to the ear, seashells resound with something like the roar of the ocean—a sensation whose explanation has offered a puzzle pleasurable and provocative to scientists and lay listeners alike.
In his 1915 Book of Wonders, popular science writer Rudolph Bodmer suggested that the association followed from the symbolic power of shells: “The sounds we hear when we hold a sea shell to the ear are not really the sound of the sea waves. We have come to imagine that they are because they sound like the waves of the sea, and knowledge that the shell originally came from the sea helps us to this conclusion very easily.” But the likeness, he urged, had a technical explanation—though one in which similitude still figured. Both sea and seashell sounds were generated by waves: “The sounds we hear in the sea shell are really air waves”—waves, that is, of concentrated, resonant noise from the listener’s surroundings.
