HBK Self-noise Monitoring System (SNMS)

The HBK Self-noise Monitoring System (SNMS) is a permanently installed, integrated solution for vibration and noise monitoring of submarines and other vessels where the management of the acoustic signature is vital.

Based on HBK’s Commercial-off-the-Shelf (COTS) PULSE™ platform, the SNMS integrates LAN-XI data acquisition hardware and PULSE software applications to provide a fully integrated solution for monitoring and analysing noise sources.

The SNMS’ main functions are as follows:

- Measuring the vibration of the hull, and the hydrodynamic noise;
- Monitoring, recording, analysing and listening to the various noise sources within the vessel for the purposes of carrying out noise surveillance and cavitation monitoring;
- Continuously and automatically monitoring to ensure that limits for both broadband (third-octave) and narrow-band noise are not exceeded;
- Recording and storing the measured spectra for subsequent recall for examination or comparison with other similar records;
- Provide facilities whereby an operator may setup and control the SNMS functions, and display the results of the various measurements, analyses and recordings;
- Provide a network interface to command and control systems for exchange of data/alarm information, and for remote access to the self-noise monitoring system;
- The system comprises permanently installed transducers (hull mounted accelerometers and external hydrophones), transducer power supply, data acquisition, data analysis, storage and display and data interface.