Self-noise monitoring systems (SNMS)

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

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Acoustic detection and identification techniques continuously become more advanced and sophisticated. As they evolve, so must acoustic stealth strategies. To maintain acoustic discretion, all noise sources of a vessel must be considered, including personnel, on-board equipment and cavitation, as well as the radiated noise signature of the vessel as a whole.

Brüel & Kjær has extensive experience in underwater acoustics and testing solutions that can be used in application-specific tasks, from investigating, analyzing and identifying noise sources to validating advanced designs.

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Self-noise monitoring systems (SNMS) system overview

Based on Brüel & Kjær’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 analyzing noise sources.

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. System enhancements include portable vibration meters and carry-on systems to perform time-limited tasks.