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Now, for the first time ever, a University of Leicester team has been given special access to measure the vibrations of the famous bells for a new BBC Four documentary, Sound Waves: The Symphony of Physics. It’s the centrepiece of the London skyline, the Elizabeth Tower, fondly known as Big Ben, which has been keeping Londoners on time with its distinct hourly bong for over 150 years. Credit: Carl Vivian, University of Leicester The Elizabeth Tower, also known as Big Ben. Credit: Carl Vivian, University of Leicester Engineers from the University of Leicester have discovered why London’s iconic Big Ben produces such a distinct bong