DG81805: RailBAM (Bearing Acoustic Monitor) equipment installed near Swaythling. This has an array of 16 microphones that can listen to a passing train and identify whether the axle bearings are sounding normal or making a different sound which might indicate the onset of failure in the future. Manufactured by Trackside Intelligence and installed by Siemens, the RailBAM product installed in the UK is a European first and the first to be employed to monitor passenger vehicles.


here's a close-up of the cabinet with its door open to expose the microphones.