Raising of Tower Bridge recorded from inside the bascule chamber by The London Sound Survey published on 2013/03/31 17:45:11 +0000 The bascule chamber is one of two large hidden vaults where the road section's counterweight sinks as the bridge is raised. It's built of brick and has a quarter-circle cross-section some 15-20m across. The recording had to be made remotely for safety reasons. Audio Technica BP4025 single-point stereo mic and Fostex FR2-LE recorder. Plenty more London sounds and related stuff on the London Sound Survey website at http://www.soundsurvey.org.uk. Many thanks to the staff of Tower Bridge for their invaluable help in making this recording. Find out more about Tower Bridge at http://www.towerbridge.org.uk.