In what is now the sixth installment of a stunning and weirdly addictive series, the BBC has released 10 full hours of video shot during the filming of the Planet Earth II “Cities” episode.
The first thing you notice is how loud it is—a shrill, almost metallic buzz that fills your head. Given unprecedented access to one of the world's largest and most secure data centers, Timo Arnall shows us that the "cloud" is not ethereal, but big, hulking and incredibly loud.
Studies of the impact of sound can have a heady overestimation of causality, but they're still worth keeping up on, especially when they include an hour of background listening. Nicola Twilley highlights research on airport soundscapes.
Ever wonder what New York City sounded like in the 1920s? Not the music or even the individual people, but the ambient noise—that swirling mix of life in America's biggest city? Thanks to historian Emily Thompson, that idle question now has an interactive answer.