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Clean

Clean

Season 1 Episode 1
55:11
Time

Time

Season 1 Episode 2
55:11
Glass

Glass

Season 1 Episode 3
54:40
Light

Light

Season 1 Episode 4
54:40
Cold

Cold

Season 1 Episode 5
54:40
How We Got to Now Season 1

Sound

Season 1 Episode 6
54:41
Episode 5: The Calling

The Calling

Season 4 Episode 5
53:05
When Whales Could Walk

When Whales Could Walk

Season 51 Episode 1
53:31
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How We Got to Now

Measuring Sound

The high levels of noise pollution in New York City instigated the formation of a noise abatement commission. Steven explains how innovator Harvey Fletcher became part of this movement and created a roving 'noise laboratory' that measured the amount of sound on the streets of the city.