Blowing With Ghosts
An extract from Locked in by Jean-Philippe Renoult (with DinahBird, Knut Aufermann and Sarah Washington) - 2008 We used a very simple sonar system consisting of speakers facing out from the boat, megaphones, battery run electronic instruments, a harmonica, our voices and microphones that picked up the sonic reflections from the concrete walls of the locks.
Blowing With Ghosts_JPR.mp3
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MP3 audio,
9435Kb

