Twenty Thousand Hertz

The stories behind the world's most recognizable and interesting sounds.
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Twenty Thousand Hertz


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Now displaying: July, 2017
Jul 25, 2017

Noise pollution is something we’ve all experienced. Road construction, motorcycles, passing aircraft - the list goes on and on. Other than being just plain annoying, what effect does noise pollution have on our lives? In this episode, we take a look at the physical and psychological effects of noise pollution on humans, as well as the wider and equally devastating environmental repercussions. Featuring Les Blomberg, executive director of the Noise Pollution Clearinghouse, and Rachel Buxton, acoustic ecologist, conservation biologist, and postdoctoral researcher at Colorado State University.

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Jul 18, 2017

We often think of the ocean as a quiet, peaceful place, filled with animals that don't make much noise. So when Christophe Haubursin from Vox went diving in the ocean for the first time, he was surprised at how rich the soundscape was: he could hear fish nibbling on coral and squid swimming. But more than anything, he could almost always hear the hum of a boat engine. It's part of a big problem in the ocean right now — ship noise has doubled every decade since 1970, wreaking havoc on marine life. 

This video was made in collaboration with Twenty Thousand Hertz, a podcast that dives deep into all kinds of stories about sound. Everything from "who's the person behind the voice on your phone," to "what do other planets sound like to our ears?" To hear more stories like this, subscribe at

Marine life photographs courtesy of NOAA, STRI Office of Bioinformatics, and Richard Bejarano. is a news website that helps you cut through the noise and understand what's really driving the events in the headlines. Check out Vox to get up to speed on everything from Kurdistan to the Kim Kardashian app. 

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Jul 11, 2017

71% of the Earth is covered by water. And most of us imagine it to be a serene, almost silent world. But why should we have all the fun up here? Discover what sound is like just below the surface and all the way down to the ocean's depths. And see how mankind might be making it unpleasant for everyone and everything that calls the oceans home. Featuring underwater acoustician Al Jones, Professor John Hildebrand from the Scripps Institution of Oceanography, and Christophe Haubursin from on special assignment.

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