What we do

Self Noise Monitoring System


CIRCE is an easy use, accurate system that submairne crew can use to monitor and record self noise.  The system is made up of a number of Self Noise Hydrophones (SNH) that are external to the pressure hull, a computer processor and a display/control interface.

The operator can monitor and record real-time acoustic data from the SNH correlated with machinery status information and Navigation data harvested from the Sonar network to:

  • Continuously monitor the own-ship self noise signature while at sea,

  • Immediately detect and therefore reduce the duration and impact of acoustic indiscretions,

  • Detect and localise abnormal noises which may be produced by:

    • A cavitating propeller,

    • Any piece of plant or machinery operating within the submarine,

    • Any loose or unsecured items in the sail or casing,

    • An object fouling the hull,

    • Flow related structural resonances,

    • Degraded isolation between internal structures and hull.

  • Provide long term machine state monitoring and management of the mechanical noise-producing machinery on the submarine,

  • Allow collection of baseline signatures for comparison across hulls and over time.