30/30 Silence has become an ever more desirable state. But when we have it, is it what we want?
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29/30 Prof Hendy travels to Accra, a city so loud that visitors describe it as a visceral shock.
28/30 David Hendy considers how music has been used to soothe, cheer, and inspire us.
27/30 Radio seemed like magic to begin with, then the Nazis exploited its darker powers.
26/30 Soldiers in WW1 experienced a sonic onslaught. Prof Hendy considers life under bombardment
25/30 How recording technology made it possible to catch the fugitive moment.
24/30 Professor David Hendy follows the writer Thomas Carlyle's grumpy attempts at soundproofing
23/30 Professor David Hendy explores how the Victorians learned to listen all over again.
22/30 Medicine's listening revolution in the 19th century with the discovery of the stethoscope.
21/30 Prof David Hendy explores how the sounds of nature gave way to the industrial revolution.
20/30 The soundscape of civil conflict in 18th-century Paris and 19th-century America.
19/30 David Hendy explores the history of slavery through sound.
18/30 Professor David Hendy eavesdrops with the servants in an 18th-century home.
17/30 Professor David Hendy explains how cramped conditions led to a brutal massacre of cats.
16/30 How settlers interpreted the sounds and songs of native American Indians.
15/30 New codes of conduct in the 16th and 17th centuries outlawed noise of every kind.
14/30 Prof David Hendy tells the story of a medieval street party that lasted for eight weeks.
13/30 David explores how medieval singers and preachers adapted to the acoustics of holy places.
12/30 David Hendy explains how sound played a part in the medieval battle between good and evil.
11/30 Prof David Hendy explores how the sound of the bell carries religion out into the world.
10/30 David Hendy eavesdrops on the private lives of early Christians.
9/30 Prof David Hendy considers the visceral impact of a stadium full of noisy humans.
8/30 David Hendy listens to the babble of ancient Rome.
7/30 Prof David Hendy explores the power of the orator.
6/30 David Hendy discovers how epic tales were remembered and passed down.
5/30 David Hendy explains why sound is central to the shaman's power.
4/30 David Hendy listens to ancient sounds in Orkney's Ring of Brodgar.
3/30 David Hendy listens to 'The Singing Wilderness'.
2/30 Humans have found many ways to communicate. David goes to Ghana to hear the talking drum.
1/30 David Hendy begins his 30-part series in the prehistoric cave.