20 spaces only, please book using EventBrite link
Writer and photographer Lewis Bush will present the findings of his investigations into number stations and covert transmissions between intelligence agencies, for his book Shadows of the State.
Numbers stations are shortwave radio broadcasts of coded messages believed to be intended for undercover agents. While the height of their activity was during some of the tensest periods of the twentieth century these stations continue to operate today, transmitting their oblique messages to persons unknown.
Shadows of the State adapts open source research and satellite image interpretation techniques in order to investigate these mysterious broadcasts and to locate the likely transmitter sites of thirty of these stations. These sites are then mapped using high resolution satellite imagery and the signals themselves are made visible to in the form of radio spectrograms alongside recordings and extensive information about each station.
Lewis will present a special Institute of Acoustics focused talk on his research on the history of number stations, triangulation methods, and spectral analysis on signals.
Advanced booking via EventBrite https://ioa_sw_lewis_bush_secrets_of_the_state.eventbrite.co.uk
Nearby parking is available on Frogmore Street or at Millennium Square
Please sign in at the College Reception from 2.30pm for a 3pm start. Yellow visitors lanyards will be issued and must be return at the end of the visit.
The room is number: 6E37 - Photographic Studio. Make your way up to 6th floor. There is a lift for any mobility issues. At the top of the stairs take the right-hand corridor through the double doors. Snake your way down the corridor and the Photostudio 6E37 is located on your left.
For more info about Lewis Bush http://www.lewisbush.com/
For more details of Regional Branch activities, please refer to the IOA website: www.ioa.org.uk
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St George's Road
Bristol, BS1 5UA